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PHP - Creating A Captcha Image
Hi,
I need help in my code. I have written a CAPTCHA code, but it is not appearing when I test run in my website. My code is below, could anyone highlight to me my error? Any problems to those that were highlighted in red? Thanks <?php session_start(); // Set some important CAPTCHA constants define('CAPTCHA_NUMCHARS', 6); // number of characters in pass-phrase define('CAPTCHA_WIDTH', 100); // width of image define('CAPTCHA_HEIGHT', 25); // height of image // Generate the random pass-phrase $pass_phrase = ""; for ($i = 0; $i < CAPTCHA_NUMCHARS; $i++) { $pass_phrase .= chr(rand(97, 122)); //chr(), convert a number to its ASCII character equivalent } // Store the encrypted pass-phrase in a session variable $_SESSION['pass_phrase'] = SHA($pass_phrase); // Create the image $img = imagecreatetruecolor(CAPTCHA_WIDTH, CAPTCHA_HEIGHT); // Set a white background with black text and gray graphics $bg_color = imagecolorallocate($img, 255, 255, 255); // white $text_color = imagecolorallocate($img, 0, 0, 0); // black $graphic_color = imagecolorallocate($img, 64, 64, 64); // dark gray // Fill the background imagefilledrectangle($img, 0, 0, CAPTCHA_WIDTH, CAPTCHA_HEIGHT, $bg_color); // Draw some random lines for ($i = 0; $i < 5; $i++) { imageline($img, 0, rand() % CAPTCHA_HEIGHT, CAPTCHA_WIDTH, rand() % CAPTCHA_HEIGHT, $graphic_color); } // Sprinkle in some random dots for ($i = 0; $i < 50; $i++) { imagesetpixel($img, rand() % CAPTCHA_WIDTH, rand() % CAPTCHA_HEIGHT, $graphic_color); } // Draw the pass-phrase string imagettftext($img, 18, 0, 5, CAPTCHA_HEIGHT - 5, $text_color, 'Courier New Bold.ttf', $pass_phrase); // Output the image as a PNG using a header header("Content-type: image/png"); imagepng($img); // Clean up imagedestroy($img); ?> Similar TutorialsI want to add some text onto an image. Sometimes I either get nothing returned or I get a shit load of garbage returned. Garbage in the form of little question mark symbols and other crap like that. PHP File - show Tickets Code: [Select] include("createImage.php"); while( $row = mysql_fetch_array( $r ) ){ echo generateTicket( $row['ticketNumber'] ) . "<br /><br />"; } PHP - createImage.php Code: [Select] <? header("Content-type: image/jpeg"); function generateTicket( $ticketNum ){ $imageFile = "images/ticket.jpeg"; if( file_exists( $imageFile ) ){ $im = @imagecreatefromjpg( $imageFile ); $text_color = imagecolorallocate( $im, 0, 0, 0 ); imagestring( $im, 6, 25, 150, $ticketNum, $text_color ); imagejpeg( $im ); }else echo 'error'; } ?> Hey all, I'm trying to upload multiple image(which works great) but the problem I'm having is when an image is uploaded it over-rights a previous image if they are the same name and the old one is gone. Solution: create a unique name for each image before it's uploaded, change the name and then upload it. I can't seem to figure the correct syntax. My thought was to take the image name and add a random number to the front of it. Am i going about this the right way? thanks for the replies in advance. code below Code: [Select] if (isset($_POST['Submit'])) { $number_of_file_fields = 0; $number_of_uploaded_files = 0; $number_of_moved_files = 0; //creating my random number $random_digit=rand(0000,9999); $uploaded_files = array(); $upload_directory = dirname(__file__) . '/car-images/'; //set upload directory for ($i = 0; $i < count($_FILES['images']['name']); $i++) { $number_of_file_fields++; if ($_FILES['images']['name'][$i] != '') { //check if file field empty or not $number_of_uploaded_files++; $uploaded_files[] = $_FILES['images']['name'][$i]; if (move_uploaded_file($_FILES['images']['tmp_name'][$i], $upload_directory . $_FILES['images']['name'][$i])) { $number_of_moved_files++; } } } $image0 = $uploaded_files[0]; $image1 = $uploaded_files[1]; $image2 = $uploaded_files[2]; $image3 = $uploaded_files[3]; $image4 = $uploaded_files[4]; Hello,
I have a website called http://flappycreator.com/ where users can upload multiple images to create their own version of Flappy Bird. As a result of this I created a PHP page that takes a GET param to create a preview image of their game to display in various locations on the website.
Here is an example:
http://flappycreator...d=5305a9ad9dc30
http://flappycreator...d=5305a9ad9dc30
http://flappycreator...d=5305a9ad9dc30
My issue is, I have given my users the ability to upload PNGs or JPGs and trying to figure out reliable code to display the preview has become a huge hassle. In the example above the Pac-Man character shows a white background but when you play the game, it is actually transparent. In other situations I am getting extremely bad color distortion. The code I have provided is my final attempt after a ton of trial-and-error and the PNG imagealphablending() and imagesavealpha() commands have shown me the best results, however I don't know what they do.
Please help! Thanks.
<?php
$bird_picture = "default/bird.png";
$tube1_picture = "default/tube1.png";
$tube2_picture = "default/tube2.png";
$ground_picture = "default/ground.png";
$bg_picture = "default/bg.png";
// If an id is set, then reset values
if (isset ( $_GET ['id'] )) {
require ('XXX.php');
$db = new DBAccess ();
$query = "SELECT * FROM XXX WHERE XXX = '{$_GET['id']}'";
$result = $db->query ( $query );
$num_results = $result->num_rows;
$row = mysqli_fetch_array ( $result );
if ($num_results != 0) {
if ($row ['bird_picture'] != "") {
$bird_picture = "instances/" . $row ['folder_dir'] . "/" . $row ['bird_picture'];
}
if ($row ['tube1_picture'] != "") {
$tube1_picture = "instances/" .$row ['folder_dir'] . "/" . $row ['tube1_picture'];
}
if ($row ['tube2_picture'] != "") {
$tube2_picture = "instances/" .$row ['folder_dir'] . "/" . $row ['tube2_picture'];
}
if ($row ['ground_picture'] != "") {
$ground_picture = "instances/" . $row ['folder_dir'] . "/" . $row ['ground_picture'];
}
if ($row ['bg_picture'] != "") {
$bg_picture = "instances/" . $row ['folder_dir'] . "/" . $row ['bg_picture'];
}
}
}
$temp = explode(".", $bg_picture);
$extension = end($temp);
if ($extension == "jpeg" || $extension == "jpg") {
$background = imagecreatefromjpeg($bg_picture);
} else {
$background = imagecreatefrompng($bg_picture);
// Turn off alpha blending and set alpha flag
imagealphablending($background, true);
imagesavealpha($background, true);
}
$temp = explode(".", $ground_picture);
$extension = end($temp);
if ($extension == "jpeg" || $extension == "jpg") {
$ground = imagecreatefromjpeg($ground_picture);
} else {
$ground = imagecreatefrompng($ground_picture);
// Turn off alpha blending and set alpha flag
imagealphablending($ground, false);
imagesavealpha($ground, true);
}
$temp = explode(".", $bird_picture);
$extension = end($temp);
if ($extension == "jpeg" || $extension == "jpg") {
$bird = imagecreatefromjpeg($bird_picture);
} else {
$bird = imagecreatefrompng($bird_picture);
// Turn off alpha blending and set alpha flag
imagealphablending($bird, false);
imagesavealpha($bird, true);
}
$temp = explode(".", $tube1_picture);
$extension = end($temp);
if ($extension == "jpeg" || $extension == "jpg") {
$tube1 = imagecreatefromjpeg($tube1_picture);
} else {
$tube1 = imagecreatefrompng($tube1_picture);
// Turn off alpha blending and set alpha flag
imagealphablending($tube1, false);
imagesavealpha($tube1, true);
}
$temp = explode(".", $tube2_picture);
$extension = end($temp);
if ($extension == "jpeg" || $extension == "jpg") {
$tube2 = imagecreatefromjpeg($tube2_picture);
} else {
$tube2 = imagecreatefrompng($tube2_picture);
// Turn off alpha blending and set alpha flag
imagealphablending($tube2, false);
imagesavealpha($tube2, true);
}
imagecopymerge($background, $tube1, 200, -200, 0, 0, 52, 320, 100);
imagecopymerge($background, $tube2, 200, 200, 0, 0, 52, 320, 100);
imagecopymerge($background, $ground, 0, 320, 0, 0, 336, 112, 100);
imagecopymerge($background, $bird, 70, 190, 0, 0, 36, 26, 100);
header('Content-Type: image/png');
imagepng($background);
# Destroy
imagedestroy($background);
imagedestroy($ground);
imagedestroy($bird);
imagedestroy($tube1);
imagedestroy($tube2);
?>
Attached Files
preview.php 3.31KB
1 downloadsBeen just trying to test out some basic code that utilizes gd. In Chrome i receive a blank page. In firefox I get "The image "image.php" cannot be displayed because it contains errors". There is no whitespace before or after the php tags, which seems to cause this error sometimes. $image = imagecreate(200,20); $background = imagecolorallocate($image, 0, 0, 0); $foreground = imagecolorallocate($image,255,255,255); imagestring($image, 5, 5, 1, "Test", $foreground); header("Content-type: image/jpeg"); $imagejpeg($image); I am just following a tutorial, and at this point in the tutorial i should get at least some garbled text, if not an image. I looked at other common causes. gd2 is un-commented in php.ini. phpinfo shows: GD Support enabled GD Version bundled (2.0.34 compatible) FreeType Support enabled FreeType Linkage with freetype FreeType Version 2.4.3 GIF Read Support enabled GIF Create Support enabled JPEG Support enabled libJPEG Version 6b PNG Support enabled libPNG Version 1.2.46 WBMP Support enabled XBM Support enabled gd.jpeg_ignore_warning 0 0 I have not found any other solutions to try, or maybe I have made an error is checking these solutions. Any advice with be great! Thank you for your time. Hello Forums, So basically I am trying to place text over an image. It works but the max text size is 5 which is way too small for my needs! What can I do to increase the size of the text? If anyone can help it would be much appreciated. Here is my code: Code: [Select] <?php $title = $_REQUEST['title'] ; $my_img = imagecreatefrompng ( "Template.png" ); $text_color = imagecolorallocate( $my_img, 0, 0, 0 ); imagestring( $my_img, 5, 30, 25, "$title", $text_colour ); header( "Content-type: image/png" ); imagepng( $my_img ); imagecolordeallocate( $text_color ); imagedestroy( $my_img ); ?> Hi there I've been working with some code to display a single record on page. This all works fine and I'm able to pull what I want from the database. My problems is trying to use that data and turning it into something else like a link. I have a field in the database called image url which contains rows of image urls. So here is the problem area of the code: Code: [Select] <?php //////Displaying Data///////////// $id=$_GET['id']; // Collecting data from query string if(!is_numeric($id)){ // Checking data it is a number or not echo "Data Error"; exit; } $fetch=mysql_query("select * from productfeeds where ProductID=$id "); $row=mysql_fetch_object($fetch); echo mysql_error(); echo "<table>"; echo " <tr><td><b>ProductID</b></td><td>$row->ProductID</td></tr> <tr><td><b>ProductName</b></td><td>$row->ProductName</td></tr> <tr><td><b>ProductPrice</b></td><td>$row->ProductPrice</td></tr> //problem area for me <tr><td><b>Image</b></td><td>$row->ImageURL</td></tr> echo "</table>"; I'm trying to edit this part of the code: <tr><td><b>Image</b></td><td>$row->ImageURL</td></tr> I've tried this: <tr><td><b>Image</b></td><td><a href='{$row['URL']}'> <img src='{$row['ImageURL']}'></a> and <tr><td><b>Image</b></td><td><a href='$row['URL']'> <img src='$row['ImageURL']'></a> //removed brackets but I'm just getting errors. Can you guys help please? Thank you very much. Hi group, I need to create a string to be used by base64_encode to build an SVG file. The source for the string is an image I built in memory. Code: [Select] $img = imagecreatetruecolor( 50,50 ); Other stuff, draw circles, test, ect. I currently write it out to disk with: Code: [Select] imagepng( $img, "$Name.png" ); Then read it back in and process it to create an SVG file. I would like to avoid writing it to disk, so how can I create a string for base64_encode from an in memory image?? Thanks for your time. Greetings, What I'm trying to do is have users upload their event information into a database which would include a flyer. I don't want the image file to go into the database (other than the filename) rather I'd like it to be dropped into a directory. In the same script I'd like to dynamically generate a thumbnail. I have the two scripts and separately they work fine, but I can't get them to work together. I'm guessing the conflict because the thumbnail script is using $_POST and the mysql script is using $_SESSION. If so how can I modify them to both use $_SESSION? The thumbnail script is goes from line 1 - 146 and the mysql portion is the rest. The results of processing this look something like this. QUERY TEXT: INSERT INTO td_events (eventgenre_sel, eventname, eventvenue, eventdate, eventgenre, eventprice, eventpromoter, eventflyer) VALUES ('12', 'spooky times', 'Ironwood Stage & Grill', '2010-12-17 22:36:00', 'DNB', '5000', 'me', '174366-1.jpg') <?php $debug = FALSE; /********************************************************************************************** CREATES THUMBNAIL **********************************************************************************************/ //define a maxim size for the uploaded images define ("MAX_SIZE","1024"); // define the width and height for the thumbnail // note that theese dimmensions are considered the maximum dimmension and are not fixed, // because we have to keep the image ratio intact or it will be deformed define ("WIDTH","500"); define ("HEIGHT","650"); // this is the function that will create the thumbnail image from the uploaded image // the resize will be done considering the width and height defined, but without deforming the image function make_thumb($img_name,$filename,$new_w,$new_h) { //get image extension. $ext=getExtension($img_name); //creates the new image using the appropriate function from gd library if(!strcmp("jpg",$ext) || !strcmp("jpeg",$ext) || !strcmp("JPG",$ext)) $src_img=imagecreatefromjpeg($img_name); if(!strcmp("png",$ext) || !strcmp("PNG",$ext)) $src_img=imagecreatefrompng($img_name); //gets the dimmensions of the image $old_x=imageSX($src_img); $old_y=imageSY($src_img); // next we will calculate the new dimmensions for the thumbnail image // the next steps will be taken: // 1. calculate the ratio by dividing the old dimmensions with the new ones // 2. if the ratio for the width is higher, the width will remain the one define in WIDTH variable // and the height will be calculated so the image ratio will not change // 3. otherwise we will use the height ratio for the image // as a result, only one of the dimmensions will be from the fixed ones $ratio1=$old_x/$new_w; $ratio2=$old_y/$new_h; if($ratio1>$ratio2) { $thumb_w=$new_w; $thumb_h=$old_y/$ratio1; } else { $thumb_h=$new_h; $thumb_w=$old_x/$ratio2; } // we create a new image with the new dimmensions $dst_img=ImageCreateTrueColor($thumb_w,$thumb_h); // resize the big image to the new created one imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y); // output the created image to the file. Now we will have the thumbnail into the file named by $filename if(!strcmp("png",$ext)) imagepng($dst_img,$filename); else imagejpeg($dst_img,$filename); //destroys source and destination images. imagedestroy($dst_img); imagedestroy($src_img); } // This function reads the extension of the file. // It is used to determine if the file is an image by checking the extension. function getExtension($str) { $i = strrpos($str,"."); if (!$i) { return ""; } $l = strlen($str) - $i; $ext = substr($str,$i+1,$l); return $ext; } // This variable is used as a flag. The value is initialized with 0 (meaning no error found) // and it will be changed to 1 if an error occurs. If the error occurs the file will not be uploaded. $errors=0; // checks if the form has been submitted if(isset($_POST['Submit'])) { //reads the name of the file the user submitted for uploading $image=$_FILES['eventflyer']['name']; // if it is not empty if ($image) { // get the original name of the file from the clients machine $filename = stripslashes($_FILES['eventflyer']['name']); // get the extension of the file in a lower case format $extension = getExtension($filename); $extension = strtolower($extension); // if it is not a known extension, we will suppose it is an error, print an error message // and will not upload the file, otherwise we continue if (($extension != "jpg") && ($extension != "jpeg") && ($extension != "JPG") && ($extension != "PNG") && ($extension != "png")) { echo '<h1>Unknown extension!</h1>'; $errors=1; } else { // get the size of the image in bytes // $_FILES[\'image\'][\'tmp_name\'] is the temporary filename of the file in which // the uploaded file was stored on the server $size=getimagesize($_FILES['eventflyer']['tmp_name']); $sizekb=filesize($_FILES['eventflyer']['tmp_name']); //compare the size with the maxim size we defined and print error if bigger if ($sizekb > MAX_SIZE*500) { echo '<h1>You have exceeded the size limit!</h1>'; $errors=1; } //we will give an unique name, for example the time in unix time format $image_name=$filename; //the new name will be containing the full path where will be stored (images folder) $newname="flyers/".$image_name; $copied = copy($_FILES['eventflyer']['tmp_name'], $newname); //we verify if the image has been uploaded, and print error instead if (!$copied) { echo '<h1>Copy unsuccessfull!</h1>'; $errors=1; } else { // the new thumbnail image will be placed in images/thumbs/ folder $thumb_name='flyers/thumb_'.$image_name; // call the function that will create the thumbnail. The function will get as parameters // the image name, the thumbnail name and the width and height desired for the thumbnail $thumb=make_thumb($newname,$thumb_name,WIDTH,HEIGHT); }} }} //If no errors registred, print the success message and show the thumbnail image created if(isset($_POST['Submit']) && !$errors) { echo "<h1>Thumbnail created Successfully!</h1>"; echo '<img src="'.$thumb_name.'">'; } /************************************************************ Adjust the headers... ************************************************************/ header("Expires: Thu, 17 May 2001 10:17:17 GMT"); // Date in the past header ("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); // always modified header ("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1 header ("Pragma: no-cache"); // HTTP/1.0 /***************************************************************************** Check the session details. we will store all the post variables in session variables this will make it easier to work with the verification routines *****************************************************************************/ session_start(); if (!isset($_SESSION['SESSION'])) require_once( "../include/session_init.php"); $arVal = array(); require_once("../include/session_funcs1.php"); reset ($_POST); while (list ($key, $val) = each ($_POST)) { if ($val == "") $val = "NULL"; $arVals[$key] = (get_magic_quotes_gpc()) ? $val : addslashes($val); if ($val == "NULL") $_SESSION[$key] = NULL; else $_SESSION[$key] = $val; if ($debug) echo $key . " : " . $arVals[$key] . "<br>"; } /********************************************************************************************** Make sure session variables have been set and then check for required fields otherwise return to the registration form to fix the errors. **********************************************************************************************/ // check to see if these variables have been set... if ((!isset($_SESSION["eventname"])) || (!isset($_SESSION["eventvenue"])) || (!isset($_SESSION["eventdate"])) || (!isset($_SESSION["eventgenre"])) || (!isset($_SESSION["eventprice"])) || (!isset($_SESSION["eventpromoter"])) || (!isset($_SESSION["eventflyer"]))) { resendToForm("?flg=red"); } // form variables must have something in them... if ($_SESSION['eventname'] == "" || $_SESSION['eventvenue'] == "" || $_SESSION['eventdate'] == "" || $_SESSION['eventgenre'] == "" || $_SESSION['eventprice'] == "" || $_SESSION['eventpromoter'] == "" || $_SESSION['eventflyer'] == "") { resendToForm("?flg=red"); } /********************************************************************************************** Insert into the database... **********************************************************************************************/ $conn = mysql_connect($_SESSION['MYSQL_SERVER1'],$_SESSION['MYSQL_LOGIN1'],$_SESSION['MYSQL_PASS1']) or die ('Error connecting to mysql'); mysql_select_db($_SESSION['MYSQL_DB1']) or die("Unable to select database"); $eventgenre_sel = addslashes($_REQUEST['eventgenre_sel']); $eventname = addslashes($_REQUEST['eventname']); $eventvenue = addslashes($_REQUEST['eventvenue']); $eventdate = addslashes($_REQUEST['eventdate']); $eventgenre = addslashes($_REQUEST['eventgenre']); $eventprice = addslashes($_REQUEST['eventprice']); $eventpromoter = addslashes($_REQUEST['eventpromoter']); $eventflyer = addslashes($_REQUEST['eventflyer']); $sqlquery = "INSERT INTO td_events (eventgenre_sel, eventname, eventvenue, eventdate, eventgenre, eventprice, eventpromoter, eventflyer) " ."VALUES ('$eventgenre_sel', '$eventname', '$eventvenue', '$eventdate', '$eventgenre', '$eventprice', '$eventpromoter', '$eventflyer')"; echo 'QUERY TEXT:<br />'.$sqlquery; $result = MYSQL_QUERY($sqlquery); $insertid = mysql_insert_id(); /*** This following function will update session variables and resend to the form so the user can fix errors ***/ function resendToForm($flags) { reset ($_POST); // store variables in session... while (list ($key, $val) = each ($_POST)) { $_SESSION[$key] = $val; } // go back to the form... //echo $flags; header("Location: /user_registration.php".$flags); exit; } mysql_close($conn); ?> Hi, I am making a CAPTCHA image. I am pretty sure the code I have is correct, but I am getting these error messages when I run the script. I use GoDaddy for hosting. The font that I reference in the script is in the root directory with the script. Any ideas? Thanks, Craig ------------ Warning: imagefilledrectangle(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 19 Warning: imageline(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 22 Warning: imageline(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 22 Warning: imageline(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 22 Warning: imageline(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 22 Warning: imageline(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 22 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagesetpixel(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 27 Warning: imagettftext() expects parameter 1 to be resource, null given in /home/content/68/6372768/html/captcha.php on line 30 Warning: imagedestroy(): supplied argument is not a valid Image resource in /home/content/68/6372768/html/captcha.php on line 35 Code: [Select] <?php session_start(); // Set some important CAPTCHA constants define('CAPTCHA_NUMCHARS', 6); // number of characters in pass-phrase define('CAPTCHA_WIDTH', 100); // width of image define('CAPTCHA_HEIGHT', 25); // height of image // Generate the random pass-phrase $pass_phrase = ""; for ($i = 0; $i < CAPTCHA_NUMCHARS; $i++) { $pass_phrase .= chr(rand(97, 122)); } // Store the encrypted pass-phrase in a session variable $_SESSION['pass_phrase'] = sha1($pass_phrase); // Create the image $img = imagecreatetruecolor(CAPTCHA_WIDTH, CAPTCHA_HEIGHT); // Set a white background with black text and gray graphics $bg_color = imagecolorallocate($img, 255, 255, 255); // white $text_color = imagecolorallocate($img, 0, 0, 0); // black $graphic_color = imagecolorallocate($img, 64, 64, 64); // dark gray // Fill the background imagefilledrectangle($img, 0, 0, CAPTCHA_WIDTH, CAPTCHA_HEIGHT, $bg_color); // Draw some random lines for ($i = 0; $i < 5; $i++) { imageline($img, 0, rand() % CAPTCHA_HEIGHT, CAPTCHA_WIDTH, rand() % CAPTCHA_HEIGHT, $graphic_color); } // Sprinkle in some random dots for ($i = 0; $i < 50; $i++) { imagesetpixel($img, rand() % CAPTCHA_WIDTH, rand() % CAPTCHA_HEIGHT, $graphic_color); } // Draw the pass-phrase string imagettftext($img, 18, 0, 5, CAPTCHA_HEIGHT - 5, $text_color, 'Courier New Bold.ttf', $pass_phrase); // Output the image as a PNG using a header header("Content-type: image/png"); imagepng($img); // Clean up imagedestroy($img); ?> why does this not display my hosting supports gd Code: [Select] <?php session_start(); create_image(); function create_image() { $rand = md5(rand(0, 9999999)); $vaule = substr ($rand, 10, 8); //widht and height is the width of the box $width = 150; $height = 30; //the will be ther sixe of the box $image = imagecreate($width, $height); $black = imagecolorallocate($image, 0, 0, 0); $white = imagecolorallocate($image, 255, 255, 255); $grey = imagecolorallocate ($image, 132, 132, 132); $blue = imagecolorallocate ($image, 138, 197, 255); //the bg of the image imagefill($image, 0, 0, $blue); //imagetext imagestring($image, 5, 15, 7, $vaule, $black); //middle line and down line imageline($image, 0, $height/2, $width, $height/2, $grey); imageline($image, $width/2, 0, $width/2, $height, $grey); //hor line image($image, 0, 0, $width, $height, $grey); image($image, 0, $height, $width, 0, $grey); //desplay image imagepng($image); imagedestroy($image); //start session $_SESSION[captcha_key]; } ?> The following code is what I am trying to use for doing a form captcha style verification and all it is throwing back when I load the page is an image of the website address. Does anyone here know where I am going wrong? I have been at this all day and gotten nowhere. Thanks in advance <?php session_start(); $rndval = rand(1000, 9999); $_SESSION['rndnum'] = md5($rndval); $img = imagecreate(60, 30); $bgc = imagecolorallocate ($img, 255, 251, 205); $fontcolor = imagecolorallocate ($img, 0, 0, 0); imagestring ($img, 5, 5, 8, $rndval, $fontcolor); header('Content-type: image/jpeg'); imagejpeg($img); imagedestroy($img); ?> I want to build a captcha from scratch, as I'm all about doing things myself, and I've proposed a nice idea on how I can achieve that, but I'm sort of lost... What I want to do is write a script that will generate a random string of both letters and numbers, with the ability to set a limit on how many characters are generated. Then, I want to store that string within a variable called "random_string". Once the user types in that code, their input would get captured in a separate php file and stored within a variable like so: $captcha_code = $_POST['catpcha_code']; Then, I would write a code to see if the user's input matches the random character string from the html: Code: [Select] <?php if ($random_string == $captcha_code) { mail($to, $subject, $body); } else { echo ("The code you entered did not match the captcha. Please go back and try again."); } ?> Is this possible? I haven't yet tried it myself, because I don't know how to generate random strings of characters, but I was just wondering if perhaps I'm on the right track? Any suggestions or advice is appreciated =) hi ,frds i am getting trouble . here is my problem captcha is working fine in firefox 3.6.16 but not in IE6 help me frds. Hello everybody, I am new to these forums and registered due to my problems which has been annoying me all the evening... I've been googling for 3 hours and still haven't found a proper answer. The situation is: I started to use session in my page. <?php ini_set('session.use_cookies', 0); ini_set('session.use_only_cookies', 0); ini_set('session.name', 'sid'); ini_set('session.auto_start', 0); ini_set('session.use_trans_sid', 1); session_start(); ?> these lines are included in, let's say, my register.php file. (please, don't recommend me cookies as i'm developing a site for mobiles) And then, there is a form: <?php echo '<form action="register.php?sid='.session_id().'" method="POST"> Įveskite kodą:<br/> <input class="input" type="text" name="captcha" maxlength="4"/><br/> <img id="captcha" src="captcha.php?sid='.session_id().'" /><br/> <input type="submit" name="submit" value="Registruotis" /><br/> </form>';?> although captcha is shown, when I submit the form and i have to check inputs I get this error: Notice: Undefined index: randomnr2 in C:\Program Files\EasyPHP-5.3.3.1\www\new\register.php on line 144 Well, my captcha.php file: <?php $randomnr = rand(1000, 9999); $_SESSION['randomnr2'] = $randomnr; $im = imagecreatetruecolor(100, 38); $white = imagecolorallocate($im, 255, 255, 255); $grey = imagecolorallocate($im, 150, 150, 150); $black = imagecolorallocate($im, 0, 0, 0); imagefilledrectangle($im, 0, 0, 200, 35, $black); //path to font - this is just an example you can use any font you like: $font = dirName(__FILE__).'/font/karate/Karate.ttf'; imagettftext($im, 20, 4, 22, 30, $grey, $font, $randomnr); imagettftext($im, 20, 4, 15, 32, $white, $font, $randomnr); //prevent caching on client side: header("Expires: Wed, 1 Jan 1997 00:00:00 GMT"); header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT"); header("Cache-Control: no-store, no-cache, must-revalidate"); header("Cache-Control: post-check=0, pre-check=0", false); header("Pragma: no-cache"); header ("Content-type: image/gif"); imagegif($im); imagedestroy($im); ?> Any ideas? Thanks in advance. Can anyone please take a quick glance at this form the captcha messages are not appearing correctly. The message keeps getting sent. Thank You Code: [Select] <?php if(($_SESSION['security_code'] != $_POST['security_code']) || (empty($_SESSION['security_code'])) ){ $to = "info@*******.com"; // change to your email address $name = htmlentities ($_POST['name']); $email = htmlentities ($_POST['email']); $phone = htmlentities ($_POST['phone']); $msg = htmlentities ($_POST['msg']); $d = date('l dS \of F Y h:i:s A'); $sub = "form to mail"; $headers = "From: $name <$email>\n"; $headers .= "Content-Type: text/plain; charset=iso-8859-1\n"; $mes = "phone: ".$phone."\n"; $mes .= "Message: ".$msg."\n"; $mes .= "Name: ".$name."\n"; $mes .= 'Email: '.$email."\n"; $mes .= 'Date & Time: '.$d; { mail($to, $sub, $mes, $headers); } echo "<p> </p><p> </p><p> </p><br />CAPTCHA CODE does not match! <p> </p><p> </p><a href='javascript:javascript:history.go(-1)'>Click here to go back to previous page</a>"; } else echo "THANK YOU"; ?> Hi, I really need to add a captcha to this PHP process form? How do I go about doing this? Code: [Select] <?php // Define some constants define( "RECIPIENT_NAME", "John Smith" ); define( "RECIPIENT_EMAIL", "john@example.com" ); define( "EMAIL_SUBJECT", "Visitor Message" ); // Read the form values $success = false; $senderName = isset( $_POST['senderName'] ) ? preg_replace( "/[^\.\-\' a-zA-Z0-9]/", "", $_POST['senderName'] ) : ""; $senderEmail = isset( $_POST['senderEmail'] ) ? preg_replace( "/[^\.\-\_\@a-zA-Z0-9]/", "", $_POST['senderEmail'] ) : ""; $message = isset( $_POST['message'] ) ? preg_replace( "/(From:|To:|BCC:|CC:|Subject:|Content-Type:)/", "", $_POST['message'] ) : ""; // If all values exist, send the email if ( $senderName && $senderEmail && $message ) { $recipient = RECIPIENT_NAME . " <" . RECIPIENT_EMAIL . ">"; $headers = "From: " . $senderName . " <" . $senderEmail . ">"; $success = mail( $recipient, EMAIL_SUBJECT, $message, $headers ); } // Return an appropriate response to the browser if ( isset($_GET["ajax"]) ) { echo $success ? "success" : "error"; } else { ?> <html> <head> <title>Thanks!</title> </head> <body> <?php if ( $success ) echo "<p>Thanks for sending your message! We'll get back to you shortly.</p>" ?> <?php if ( !$success ) echo "<p>There was a problem sending your message. Please try again.</p>" ?> <p>Click your browser's Back button to return to the page.</p> </body> </html> <?php } ?> ?? Thanks in advance! This is my first captcha script...it has 2 files, check.php and insert.php It works fine but I would like to hear your opinion what can I do to make it better? Is there any way that I can add random images ? Here is insert.php Code: [Select] <html> <body> <form action="check.php" method="post"> <img src="captcha.jpg"/> Insert captcha: <input type="text" name="cap"/> <input type="submit" value="submit"/> </form> </body> </html> here is check.php Code: [Select] <html> <body> <?php $cap= "flirc"; if ($_POST["cap"]==$cap) echo "Captcha is right!"; else echo " Captcha is wrong! "; ?> </body> </html>It is pretty basic, I know You can see it in action here Ideally just one word authentication and pretty simple, but effective. Preferebly one that does not use Sessions because then the user is unable to press the back button to go back to the original page after submitting the form... I know I could just put a text link there but not all users would click that link... Code: [Select] <?php /* * To change this template, choose Tools | Templates * and open the template in the editor. */ $width=120; $height=60; $image= imagecreate($width, $height); $txt=substr(md5(rand()),0,8); $white= imagecolorallocate($image, 255, 255, 255); $black= imagecolorallocate($image, 0, 0, 0); $red= imagecolorallocate($image, 255, 0, 0); $new= imagecolorallocate($image, 128, 128, 255); //imagefilledrectangle($image, 10, 10, 110, 50, $white); imagefilledrectangle($image, 20, 20, $width-20, $height-20, $new); imagestring($image, 40, 27, 22, $txt, $black); header("content-type:image/jpeg"); imagejpeg($image); imagedestroy($image); ?> hi i was wondering if anyone had any idea how i can add code A to code b below? code a is my captcha code and code b is my contact form code thanks.. CODE A CAPTCHA: Code: [Select] <?php if(isset($_POST["captcha"])) if($_SESSION["captcha"]==$_POST["captcha"]) { echo 'CAPTHCA is valid; proceed the message'; } else { echo 'CAPTHCA is not valid; ignore submission'; } ?> CODE B CONTACT FORM: Code: [Select] <? $mailto = "me@blah.com"; $cc = ""; $bcc = ""; $subject = "Email subject"; $vname = "blah blah"; $email = $_POST['email']; function validateEmail($email) { if(eregi('^[a-zA-Z0-9._-]+@[a-zA-Z0-9-]+\.[a-zA-Z]{2,4}(\.[a-zA-Z]{2,3})?(\.[a-zA-Z]{2,3})?$', $email)) return true; else return false; } if(strlen($_POST['name']) < 1 || strlen($_POST['message']) < 1 || validateEmail($email) == FALSE) { $emailerror = 'Error:'; if(empty($_POST['name'])) { $emailerror .= '<li>Enter name</li>'; } if(validateEmail($email) == FALSE) { $emailerror .= '<li>Enter valid email</li>'; } if(empty($_POST['message'])) { $emailerror .= '<li>Enter message</li>'; } } else { $emailerror .= "Your email has been sent successfully"; $timestamp = date("F j, Y, g:ia"); $messageproper ="\n\n" . "Name: " . ucwords($_POST['name']) . "\n" . "Email: " . ucwords($email) . "\n" . "Comments: " . $_POST['message'] . "\n" . "\n\n" ; $messageproper = trim(stripslashes($messageproper)); mail($mailto, $subject, $messageproper, "From: \"$vname\" <".$_POST['e_mail'].">\nReply-To: \"".ucwords($_POST['first_name'])."\" <".$_POST['e_mail'].">\nX-Mailer: PHP/" . phpversion() ); } ?> |
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