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PHP - Captcha Vs Challenge Question
How effective is Captcha anymore?
How does using Captcha compare to using a Challenge Question like "2 + 3 = ??" I am creating a form on my website where users can e-mail me their comments - although my e-mail is hidden - and I don't want this to become a spam-magnet?! Debbie Similar TutorialsHey guys. Sorry to start asking questions being such a new member but this just suddenly came up. I have a php script that needs to send binary data to another php script via HTTP. The data can be transferred through the methods GET and POST, preferably POST and preferably not as a file. The problem is that I have tried a number of ways to do this but every time the data seems to be corrupted. Some bytes stay the same but others disappear or change. I guess that they transfer through ASCII mode instead of BINARY but couldn't find any way to fix this. Any help would be deeply appreciated. Cheers. Hi, My code below only allows me to search exact terms and therefore does not allow for spelling mistakes of names etc. Please can somebody advise how I can alter the code below to allow a user to search part of the search criteria and still retrieve results e.g. a search for "business" would return "business analysis", "business architecture" and so on. Any help would be greatly appreciated. $sql="SELECT DISTINCT First_Name, Last_Name, l.Resource_ID FROM ((resource l inner join resource_skill ln on l.Resource_ID = ln.Resource_ID) inner join skill n on ln.Skill_ID = n.Skill_ID) WHERE First_Name LIKE '$fname' OR Last_Name LIKE '$lname' OR Skill_Name LIKE '$skill'"; Thanks a lot! Paul Hi guys,
I’d appreciate a little guidance but I’m gonna struggle to explain what the problem is first… so apologies in advance.
$drawOrder is an array of 1 to 10 letters that are drawn at random
Array
(
[101] => C
[102] => F
[103] => D
[104] => J
[105] => B
[106] => H
[107] => I
[108] => G
[109] => E
[110] => A
)
$bestOrder contains the same values as $drawOrder but the letters are given a priority.
Array
(
[0] => A
[1] => B
[2] => C
[3] => D
[4] => E
[5] => F
[6] => G
[7] => H
[8] => I
[9] => J
)
$bestPossibleOrder – I want this to contain the closest order possible to $bestOrder based on the draw order and 3 letter draw limit
Array
(
[101] => C
[103] => D
[105] => B
[102] => F
[106] => H
[108] => G
[109] => E
[110] => A
[107] => I
[104] => J
)
$availableLetters contains 3 letters that are drawn according to $drawOrder.
Array
(
[101] => C
[102] => F
[103] => D
)
add “[101] => C” to $bestPossibleOrder array
remove “[2] => C” from the $bestOrder array because the letters are not always unique
add “[104] => J “ to $availableLetters because it is next in the draw order.
Array
(
[102] => F
[103] => D
[104] => J
)
add “[103] => D” to my $bestPossibleOrder array
remove “[103] => D” from the $bestOrder array because the letters are not always unique
add “[102] => B“ to $availableLetters because it is next in the draw order.
Array
(
[102] => F
[104] => J
[102] => B
)
Repeat the process until all letters are in the $bestPossibleOrder array
Array
(
[101] => C
[103] => D
[105] => B
[102] => F
[106] => H
[108] => G
[109] => E
[110] => A
[107] => I
[104] => J
)
I’ve attached what I’ve written so far but I’m not sure if it’s a good approach
<?php
$BR = "<br />";
echo "best order:" . $BR;
$bestOrder = array("A","B","C","D","E","F","G","H","I","J");
print ("<pre>" . print_r($bestOrder, true) . "</pre>");
echo "draw order:" . $BR;
$drawOrder = shuffle_assoc($bestOrder);
$drawOrder = array_combine(range(101,(count($bestOrder)+100)),$drawOrder);// $drawOrder array keys have to start from 101
print ("<pre>" . print_r($drawOrder, true) . "</pre>");
echo "available Letters (FIRST DRAW):" . $BR;
$availableLetters = array_slice($drawOrder, 0, 3,true);
print ("<pre>" . print_r($availableLetters, true) . "</pre>");
$numberToPick = selectNextNumber($bestOrder,$availableLetters);
echo "The key with the closest letter to best order is [" . $numberToPick . "]";
function selectNextNumber($bestOrder,$availableLetters){
for ($x = 0; $x <= count($bestOrder); $x++){
$numberToPick = array_search($bestOrder[$x], $availableLetters);
if ($numberToPick !== false) {
//unset($bestOrder[$x]);
//print ("<pre>" . print_r($bestOrder, true) . "</pre>");
return $numberToPick;
}
}
}
function shuffle_assoc($list) {
if (!is_array($list)) return $list;
$keys = array_keys($list);
shuffle($keys);
$random = array();
foreach ($keys as $key) {
$random[$key] = $list[$key];
}
return $random;
}
Hi If any one has any spare time or is intrigued in any way. I am constructing a website forum like the one you use. This one requires a log on. It works in FF 6.0, Opera Safari and Chrome but not in IE 8.0. I have filled in the passwords(s) extra security. http://www.des-otoole.co.uk/streetangels/ Many thanks if you can work it out. You just need to push the button (login) Hi All! First post here - I'm a bit of a self taught PHP junkie I'm having some issues with the following php/MySQL code. The issue is with Internet Explorer (surprise, surprise) I have setup an if statement so that the long description field in the form comes up as a text area (based on the max-length property of the mySQL field.), while the shorter fields come up as text fields. The issue is that in IE, none of the shorter fields preceding the Long Description Text Field show up - ie. the form is lacking a couple of necessary fields. Works perfectly well in Firefox. <form id="addprod" name="addprod" action="" method="get" enctype="multipart/form-data"> <?php require_once($_SERVER['DOCUMENT_ROOT'].'/resources/db/viewer_connect.php'); $table = 'products'; $fieldQuery = "SELECT * from $table"; $result = mysql_db_query($dbname,$fieldQuery) or die('<span class="body_text">Query Error: '.mysql_error().'</span>'); $i = 0; $prInfo = array('PROD_ID'=>'Product ID', 'PROD_NAME'=>'Product Name', 'PROD_DESC_SHORT'=>'Product Description (Short)', 'PROD_DESC_LONG'=>'Product Description (Long)', 'MODEL_1'=>'Model 1', 'MODEL_2'=>'Model 2', 'MODEL_3'=>'Model 3', 'MODEL_4'=>'Model 4', 'MODEL_5'=>'Model 5', 'RRP_1'=>'Model 1 RRP($)', 'RRP_2'=>'Model 2 RRP($)', 'RRP_3'=>'Model 3 RRP($)', 'RRP_4'=>'Model 4 RRP($)', 'RRP_5'=>'Model 5 RRP($)', 'PROD_IMG'=>'Main Image', 'IMAGE_2'=>'Image 2', 'IMAGE_3'=>'Image 3'); while ($i < mysql_num_fields($result)) { $meta = mysql_fetch_field($result, $i); if (!$meta) { echo "No information available<br />\n"; } if($meta->max_length<=256){ if($meta->name=='PROD_IMG'||$meta->name=='IMAGE_2'||$meta->name=='IMAGE_3'){ echo '<p class="body_text"><label for="'.$meta->name.'">'.$prInfo[$meta->name].':<input name="'.$meta->name.'" type="file" size="50" maxlength="'.$meta->max_length.'" /></label></p>'; } else{ echo '<p class="body_text"><label for="'.$meta->name.'">'.$prInfo[$meta->name].':<input name="'.$meta->name.'" type="text" size="50" maxlength="'.$meta->max_length.'" /></label></p>'; } } else{ echo '<p class="body_text" style="line-height:150px; vertical-align:top;"><label for="'.$meta->name.'">'.$prInfo[$meta->name].':<textarea name="'.$meta->name.'" cols="50" rows="10" /></p>'; } $i++; } mysql_free_result($result); ?> <p class="body_text"><input type="submit" value="Add New Record" /><input type="reset" value="Clear Form" /></p> </form> Any thoughts would be awesome!! Thanks in advance, Tim LOL note the topic is a pun at Help Vampires... I actually have an unchallenging question. I'm trying to echo out a column in a MySQL table. I'm getting one field echoing, but not the others: I'm using this code style, but I've made a small mistake somewhere at the end, I've tried many combinations trying to fix it, but haven't succeeded.. $query = "select email from newsletters"; $result = mysql_query($query); $row = mysql_fetch_array($result); foreach ($row as $email) {echo $email;} I got the argument foreach() straight out of the manual and copied the syntax style exactly as was demonstrated in the example, but its still not working. What have I done wrong? Hi All Thanks in advance for your help. I want to have to following query string Type=myparam&Username=dazd&Password=nk98830&id=0&Cols_Returned=numfrom,sentdata But my code returns the following Type=myparam&Username=dazd&Password=nk98830&id=0&Cols_Returned=%2F%22numfrom%2F%22%2C%2F%22sentdata%2F%22 Below is the code: $data= array( "Type"=> "myparam", "Username" => "dazd", "Password" => "nk98830", "id" => "0", "Cols_Returned" => '/"numfrom/",/"sentdata/"' ) ; //This contains data that you will send to the server. $data = http_build_query($data); //builds the post string ready for posting echo "The Query String is "; echo $data; Regards 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); ?> 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]; } ?> 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); ?> 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, 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! 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. 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"]==$cap) echo "Captcha is right!"; else echo " Captcha is wrong! "; ?> </body> </html>It is pretty basic, I know You can see it in action here hi ,frds i am getting trouble . here is my problem captcha is working fine in firefox 3.6.16 but not in IE6 help me frds. Can anyone please take a quick glance at this form the captcha messages are not appearing correctly. The message keeps getting sent. Thank You Code: [Select] <?php if(($_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 guys, I just decided to add an addition question in my site for submitting a form, not gonna say where coz one of you will most proberly try to prove it doesnt work! I have a feeling its easy enough for someone to send my form by getting the two variables and evaluating them. But how would they do that? and how would they know the names of the variables to send...? Is there a way of doing a math captcha that cannot be hacked? I am trying to implement the new version of captcha on my website.
What i did so far:
Inside the FORM:
echo '<div class="g-recaptcha" data-sitekey="XXXXXXXXXXXXXXXXXXXXXXXXXXXX"></div>';Inside PHP:
$recaptcha = $_POST['g-recaptcha-response'];
if(!empty($recaptcha))
{
$google_url = "https://www.google.com/recaptcha/api/siteverify";
$secret = 'YYYYYYYYYYYYYYYYYYYYYYYYYYY';
$ip = $_SERVER['REMOTE_ADDR'];
$url = $google_url."?secret=".$secret."&response=".$recaptcha."&remoteip=".$ip;
$res = getCurlData($url);
$res = json_decode($res, true);
if($res['success'] == 'false')
{
$captcha_error = "Please re-enter your reCAPTCHA.";
}
}
The getCurlData function:
function getCurlData($url)
{
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_TIMEOUT, 10);
curl_setopt($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.16) Gecko/20110319 Firefox/3.6.16");
$curlData = curl_exec($curl);
curl_close($curl);
return $curlData;
}
What i want to achieve is to know when the no-Captcha box is checked. I want to throw an error to the user if he/she did not check that box.
So far i only throw an error if the response from Google is "We are not sure if you are human, please proceed to our second level of verification" [if($res['success'] == 'false')].
PS: most of the code is written by Srinivas Tamada. You can find it here.
Thanks in advance.
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($img); ?> hi i was wondering if anyone had any idea how i can add code A to code b below? code a is my captcha code and code b is my contact form code thanks.. CODE A CAPTCHA: Code: [Select] <?php if(isset($_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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