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PHP - Header Errors - Read Here Before Posting Them
i've seen this error pop up time and time again, and the answer is ALWAYS the same. please look here before you post it. the problem is you are outputting to the browser (whitespace included) before sending a header. this is unallowed. remove output prior to the header, or use OUTPUT BUFFERING.
NEW EDIT TO THIS TOPIC: what usually results in these errors is poor script design. when one processes a form, they should do it BEFORE OUTPUTTING ANYTHING TO THE BROWSER. there is NO reason that the process cannot be operated in the header of the document, before any HTML is output. let's take a common example. the programmer wants a login form which checks the username and password against the database. if they don't match, then don't set a cookie remembering them and tell them it failed. if they do match, set the cookie and send them to a member page. many will do: [HTML starting the page and layout] [PHP processing the form] [form code] because they can simply echo any errors straight from PHP right above that form. they can also send a success message, set the cookie, and header() them off on their merry way without seeing the form again. it's a logical place to put this code. think again. you'll (perhaps not so) obviously get header errors when you go to use setcookie() and header(). if the login fails, it's dandy, but if you have a successful login the user gets nowhere. answer: put the processing in the header, and store the results in variables. perhaps a $result variable that is 1 if successful, 0 if failed. then $output that contains either a success message or customized error messages. the new code would look like: [PHP processing the form (if it was sent) and storing the results] [HTML starting the page and layout] [PHP echoing the results] [form code if failed - exit(); if successful] this will solve your header errors and will make for much more maintainable and readable code. if you want to redirect them elegantly (with a success message), use a <meta> refresh redirect. header() should only be used in instances where instant redirection is desired. Similar TutorialsHello, I am new to some of the rules to PHP as far as what you can POST or SEND via forms in PHP. I am attempting to change the location of a page via the header() function and basically redirect to another page if the weather is inclimate at an outdoor events center. Currently what I have is two different submit buttons that would post the header() redirect based on if the weather is good or bad. Ex. <div style="width:220px; height:50px;"> <form method="POST" action="../../weather.php"> <input type="submit" value="Good Weather" name="weather_good" /> <input type="submit" value="Bad Weather" name="weather_bad" /> </form> </div> Then the processing for the form is this file - <?php if(isset($_POST['weather_good'])){ $myFile = "../myfile.php"; $fh = fopen($myFile, 'w') or die("can't open file"); $stringData = echo "<?php header ('Location:fall_festival/index.php'); ?>"; fwrite($fh, $stringData); fclose($fh); echo "Page Updated"; } else if(isset($_POST['weather_bad'])){ $myFile = "../myfile.php"; $fh = fopen($myFile, 'w') or die("can't open file"); $link = "header('Location:fall_festival/weather/index.php');" ; $stringData = $link; fwrite($fh, $stringData); fclose($fh); echo "Page Updated"; } ?> The file doesn't return an error when it's processed but it also doesn't update the file header and redirect to the proper page. Thanks for your time and help! Code: [Select] header("Location: index.php?x=y") , i had seen people having this problem when i was asking too.. about adding GET values to a change header function... Anyone still need this help? hi there, seems like I'm getting a fairly common beginners php error but as I'm using a number of differant files and as I'm not entirley clear on a couple of things I thought I'd tap into the immense php talent on this site here's the error - Warning: Cannot modify header information - headers already sent by (output started at C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\Epointment\index.php:4) in C:\Program Files\Apache Software Foundation\Apache2.2\htdocs\Epointment\ot\views\header.php on line 38 I have an index page that allows a user to log on, the processing go's away and checks the usual stuff then reloads the login page with the user detail or just reloads the login page with the user/password fields blank. This seemed to be working ok until I put my files onto another web server that had output_buffering turned off. here's part of the login page Code: [Select] <html> <head><title></title></head> <body> <?php ini_set("display_errors", "1"); error_reporting(-1); $dir = dirname(__FILE__); require_once "$dir/ot/ot.php"; ot::include_view('header', array('account' => null)) ?> // various stuff <p>Please login below</p> <?php ot::include_view('login_form')?> the ot.php file doesn't have any echo's or print_r's etc if that helps?? here's the header.php file.. <?php Code: [Select] if (ot::get('do_logout', 0) == 1) { ot::destroy_session(); header("Location: http://{$_SERVER['SERVER_NAME']}{$_SERVER['PHP_SELF']}"); exit; } elseif (self::post('do_reset_password')) { ot::do_reset_password($err); echo "$err"; } $adb = ot::db('account'); $account = null; $error = ""; $id = ot::account_id(); if ($id) { $account = ot::account_from('id', $id); $res = ot::do_change_password($account, $err); if ($res) { echo "<p>Password Changed Successfully</p>"; $account = $res; } else if ($err) { echo "<p>Error: $err</p>"; } $res = ot::do_change_email($account, $err); if ($res) { echo "<p>Email Changed Successfully</p>"; $account = $res; } else if ($err) { echo "<p>Error: $res</p>"; } } else { $account = ot::do_login(); if ($account) { header("Location: http://{$_SERVER['SERVER_NAME']}{$_SERVER['PHP_SELF']}"); exit; } } ?> here's the ot::do_login function Code: [Select] public static function do_login(&$err="") { $adb = ot::db('account'); $e = self::post('email'); $p = self::post('pwd', '', false); if (self::post('do_login') && $e && $p) { $ao = self::account_from('email', $e); if ($ao) { if (self::validate_login($e, $p, $ao)) { //echo "\n"."hit2"; $_SESSION['id'] = $ao->id; return $ao; } } $err = "Invalid email or password"; return false; } } and here's the login_form.php, which is called from ot::do_login from header.php ... Code: [Select] <form action='<?php echo $_SERVER['REQUEST_URI']?>' method='post' > <p>Email:<br/><input type='text' name='email' /></p> <p>Password:<br/><input type='password' name='pwd' /></p> <p><input type='submit' name='do_login' value='Login' /> <input type='submit' name='do_reset_password' value='Reset Password' /></p> </form> Any pointers or useful things I've not posted? is this bit of code from above ok? as in I'm doing some php stuff before the header() function gets used? Code: [Select] <html> <head><title></title></head> <body> <?php ini_set("display_errors", "1"); error_reporting(-1); $dir = dirname(__FILE__); require_once "$dir/ot/ot.php"; ot::include_view('header', array('account' => null)) I have a web site with a user login requirement that has worked splendidly for months. I also have a development version of my site on my laptop, localhost. At the moment, I have identical code on both the development and production sites. I'm getting some header error in production, but not on development. Is it guaranteed that my page is generating some white space, or is it possible that there may be another issue at hand (I'm fairly non-technical, so I'm grasping here - my web host upgraded to a different PHP version that is creating whitespace in production while development on my laptop is a different version of php, my web host has done something else that is causing this, fill in the blank with your own conspiracy theory)? Any reading material out there (besides the php.net manual) that explores what may be going on? Thanks in advance - this community has been wonderfully helpful for me over the last year! Hey, I'm trying to open a .php file and read a comment block that is in the beginning of the file. I'm having some trouble in that nothing is being echoed out. Here is the reading file: <?php $fb = fopen("tepl.php", "r"); $data = fread($fb, 8192); fclose($fb); var_dump($data); ?> here is the file (tepl.php) being read: <?php /* Name: Test Plugin 1 URI: http://www.theorangeday.com/plugintest/ Description: This is just a test plugin because I need to test how this thing is going to work overall. Author: Thomas Francis Author URI: http://www.theorangeday.com/ Version: 0.1 */ function test_plugin(){ echo "we loaded the test plug"; } ?> the var_dump returns Code: [Select] string(321) " " What's wrong here? Hello,
I try to get website speed of some website, but i can read only ''domain.com'' i can't read website files like css , js ... why ? i use proxies for this job.
here is the php code:
$options = array(
'useragent' => "Firefox (+http://www.firefox.org)", // who am i
'connecttimeout' => 120, // timeout on connect
'timeout' => 120, // timeout on response
'redirect' => 10, // stop after 10 redirects
'referer' => "http://www.google.com",
'proxyhost' =>'85.25.8.14:80'
);
$response = http_get("http://solve-ict.com/wp-content/themes/ict%20theme/js/jquery-1.7.1.min.js", $options , $info);
but it works fine with http://domain.com/ , but with files css or js it gives 404, using some free proxy servers available
?
Thanks.
Trying to get this done: Page_1 has many external links, when certain links are clicked i do not want user to go directly to page, but rather go to a special add page_2 where user must click a second time on the link to finally get there. The add page_2 must show on screen the name of the initial link from page_1, it must change accordingly with the link it came from page_1,once on page_2 the hyperlink redirects outside the site. So far i am thinking give an id to the div or "<a href..." on page_1 then somehow have page_2 detect that id and fill in the variable for the final external link. Other wise is there a way to detect a url from incoming? I guess a similar example is how some domain name sellers landing page will indicate the name of the site. Such as "Thisdomain.com" is for sale. same landing page but the name changes according to the domain that was typed. I got a question im using izabi for me im one who loves the software. But there some quirks that they forgot to add when making the mail system. I was wondering how it would be possible to code in a peice of php where it says read after someone read the email. If you need a copy of the mail mail script let me know. This topic has been moved to PHP Applications. http://www.phpfreaks.com/forums/index.php?topic=350027.0 Hello everyone, I'm just starting out with PHP as I need to create an online bookstore for a school project. I'm working by a magazine which should teach you exactly how to do this using PHP, but I've had a bunch of problems with the code they use and I don't really know what's going on. Anyway, this looks really simple and basically what it does is allows you to post a comment on a book, then returns you to the book's page. Problem is, I'm getting the Header may not contain more than a single header, new line detected. error and I can't figure out why. I've tried researching into the matter but all the cases I found had to do with returning to an url, which is not my case. Anyway, here's the snippet of code: The form: Code: [Select] <div style="width:400px; border:1px solid #ffffff; background-color:#F9F1E7; padding:5px"> <b>Adauga opinia ta:</b> <hr size="1"> <form action="adauga_comentariu.php" method="POST"> Nume: <input type="text" name="nume_utilizator"><br><br> Email: <input type="text" name="adresa_email"><br><br> Comentariu: <br> <textarea name="comentariu" cols="45"></textarea><br><br> <input type="hidden" name="id_carte" value="<?=id_carte?>"> <center><input type="submit" value="Adauga"</center> </form> </div> The script adaugare_comentariu.php: Code: [Select] <?php ob_start(); include("conectare.php"); $numeFaraTags=strip_tags($_POST['nume_utilizator']); $emailFaraTags=strip_tags($_POST['adresa_email']); $comentariuFaraTags=strip_tags($_POST['comentariu']); $sql="insert into comentarii (id_carte, nume_utilizator, adresa_email, comentariu) values(".$_POST['id_carte'].", '".$numeFaraTags."','".$emailFaraTags."','".$comentariuFaraTags."')"; mysql_query($sql); $inapoi="carte.php?id_carte=".$_POST['id_carte']; header("location:urldecode($inapoi)"); ob_end_flush(); ?> conectare.php connects to the mysql database. $inapoi is the variable which returns the user to carte.php (the book he posted a comment on), where id_carte is the book's unique id. I'm getting Header may not contain more than a single header, new line detected on line ten, which is the header line. Can anyone help me? I've been stumped on this for a few days now and I've just let it pass and started working on other bits, but it's bugging me too much and I'd like to fix it. How do I display the actual errors in IIS 7.5? If I miss a semicolon, I get: "HTTP Error 500.0 - Internal Server Error" absolutely useless. In prior versions, I could see the line and get to the PHP error. How do I display PHP errors? I've added: set_ini('display_errors', '1'); but it doesn't help. i'm doing a form that posts values to XML, and i don't know how. can someone help me with a quick lesson in passing variables/XML data? i don't even know what question to ask, actually - the XML format i've been given is: Code: [Select] <?xml version="1.0" encoding="UTF-8"?> <lead> <innerNode></innerNode> <last_name>Smith</last_name> <first_name>John</first_name> </lead> and what i've come up with so far is this, but i don't even know if i'm on the right track: Code: [Select] $last_name = $_REQUEST['l_name']; $first_name = $_REQUEST['f_name']; $url = "http://url.com/leads"; $post_string = '<?xml version="1.0" encoding="UTF-8"?> <lead> <innerNode></innerNode> <last_name>'.$last_name.'</last_name> <first_name>'.$first_name.'</first_name> </lead>'; $header = "POST HTTP/1.0 \r\n"; $header .= "Content-type: text/xml \r\n"; $header .= "Content-length: ".strlen($post_string)." \r\n"; $header .= "Content-transfer-encoding: text \r\n"; $header .= "Connection: close \r\n\r\n"; $header = $post_string; $ch = curl_init(); curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0); curl_setopt($ch, CURLOPT_URL,$url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_TIMEOUT, 4); curl_setopt($ch, CURLOPT_CUSTOMREQUEST, $header); $data = curl_exec($ch); if(curl_errno($ch)) { print curl_error($ch); } else { echo "yay"; curl_close($ch); } i'm being told "should return a response.xml with either a success or failure post status." which is confusing me can someone help a bit? thanks very much... GN I've tried this: <?php $xsblock = $_SERVER['HTTP_REFERER']; $url = "testchan"; $pos = strpos($xsblock, $url); if ($pos == false) { die(); } else { echo "content content content content content content content content"; } ?> How can I do this correctly? Thanks in advance! Hi guys, I have a list box. say the code is Code: [Select] <select name="drop1" id="Select1" size="4" multiple="multiple"> <option value="1">item 1</option> <option value="2">item 2</option> <option value="3">item 3</option> <option value="4">item 4</option> <option value="0">All</option> </select> The user will select few items. How do i capture the data through the "POST" method. Code: [Select] $data = $_POST['drop']; would not work coz there is an array if data. Can any one help or point me in the right direction? Thanks in advance I am working on a PHP/MySQL authorization script. The script seems to work initially, but when I try to Login and post the Form ( echo '<form method="post" action=authorize_1.php">'; echo '<table>'; echo '<tr><td>Userid:</td>'; echo '<td><input type="text" name="userid"></td></tr>'; echo '<tr><td>Password:</td>'; echo '<td><input type="password" name="password"></td></tr>'; echo '<tr><td colspan="2" align="center">'; echo '<input type="submit" value="Log in"></td></tr>'; echo '</table></form>'; ) Internet Explorer returns the error that the page is not found.... but I am using one .php file for the authorization so I am sure the page is found because i can see the Login portion. Any ideas as to what is going wrong? Hi, i have written a form that uses 3 dropdown boxes, one of them being populated from a database. The form code is as follows; Code: [Select] <form id="pointsForm" name="pointsForm" method="post" action="points-engine.php"> <select name="car" id="car"> <?php // result of car name collection $result = mysql_query ($query); //Array stored in $cars while($cars=mysql_fetch_array($result)){ //option values added by looping through array echo "<option value=$cars[id]>$cars[carName]</option>"; } ?> </select> <select name="season" id="season"> <option value="low">Low season</option> <option value="mid">Mid season</option> <option value="high">High season</option> <option value="peak">Peak season</option> </select> <select name="period" id="period"> <option value="day">One day</option> <option value="weekend">Weekend</option> <option value="week">One week</option> </select> <input type="submit" name="Submit" value="Submit" /> </form> which posts to; Code: [Select] <?php $car=$_POST['car']; echo $car; $season=$_POST['season']; echo $season; $period=$_POST['period']; echo $period; ?> The initial form code is working fine, the car field is being populated from the database. My problem is the post value for car isn't working... points-engine.php is echoing $season & $period fine but not $car can anyone tell me why? many thanks Richard You guys helped me create a function to gather information for my database. Now I need some help with posting that information. Function code and Form: <?php include("opendatabase.php"); ?> <?php function createMatchup($week, $game) { $query1 = "SELECT team_name FROM schedule, teams WHERE schedule.week_id = $week AND schedule.game_id = $game AND schedule.A_team = teams.team_id"; $query2 = "SELECT team_name FROM schedule, teams WHERE schedule.week_id = $week AND schedule.game_id = $game AND schedule.H_team = teams.team_id"; $result1 = mysql_fetch_assoc(mysql_query($query1)); $result2 = mysql_fetch_assoc(mysql_query($query2)); $output = " <input type=\"text\" size = \"3\" name=\"w$weekg$gameA\"> {$result1['team_name']} vs. {$result2['team_name']} <input type=\"text\" size = \"3\" name=\"w$weekg$gameH\">"; return $output; } $game1 = createMatchup(1, 1); $game2 = createMatchup(1, 2); $game3 = createMatchup(1, 3); $game4 = createMatchup(1, 4); $game5 = createMatchup(1, 5); $game6 = createMatchup(1, 6); $game7 = createMatchup(1, 7); $game8 = createMatchup(1, 8); $game9 = createMatchup(1, 9); $game10 = createMatchup(1, 10); $game11 = createMatchup(1, 11); $game12 = createMatchup(1, 12); $game13 = createMatchup(1, 13); $game14 = createMatchup(1, 14); $game15 = createMatchup(1, 15); $game16 = createMatchup(1, 16); mysql_close($con); ?> <form action="insert_spreads.php" method="post"> <?php echo $game1; ?> <br> <?php echo $game2; ?> <br> <?php echo $game3; ?> <br> <?php echo $game4; ?> <br> <?php echo $game5; ?> <br> <?php echo $game6; ?> <br> <?php echo $game7; ?> <br> <?php echo $game8; ?> <br> <?php echo $game9; ?> <br> <?php echo $game10; ?> <br> <?php echo $game11; ?> <br> <?php echo $game12; ?> <br> <?php echo $game13; ?> <br> <?php echo $game14; ?> <br> <?php echo $game15; ?> <br> <?php echo $game16; ?> <br /><br /> <input type="Submit" value="Submit Spreads"> </form> I'm wondering if I can use this code for posting to the database (insert_spreads.php): <?php header("Location: admin_schedule.php"); include("opendatabase.php"); $w$weekg$gameA=("$_POST['w$weekg$gameA']"); $w$weekg$gameH=("$_POST['w$weekg$gameH']"); $sql=" UPDATE schedule SET A_pt_spread= '$w$weekg$gameA',H_pt_spread= '$w$weekg$gameH' WHERE week_id = '$week' AND game_id = '$game'; $result = mysql_query($sql) or die(mysql_error().$sql); mysql_close($con) ?> Thanks for helping. hello, i have a while loop that displays multiple tables of data depending on how many are in the database... i have a link if you click it will redirect to another page that prompts you to save an xls file with the table data... this was all working for me before when i had the while loop display rows of data in one table...well i decided that i would like the while loop to display a separate table each time... when i changed it... the xls file only shows one table of data... how can i set up so it will export all tables of data... is there some kind of loop i can set up for it to append the tables?? i have the table data all in a variable $table which i put into a hidden form field that redirects to the xls export page.... any help is appreciated... <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Admin</title> </head> <body> <?php $sql= mysql_query("SELECT * FROM programs") or die (mysql_error()); while($row = mysql_fetch_array($sql)){ $table = "<table border='1' width='600' style='border-collapse:collapse;'>" . "<th colspan='4'>Programs</th>" . "<tr>" . "<td>ID</td>" . "<td>Views</td>" . "<td>Enabled</td>" . "</tr>"; $prog_titles = $row['titles']; $prog_titles = explode(',' , $prog_titles); $table .= "<tr>" . "<td>".$row['id']. "</td>" . "<td>".$row['views']. "</td>" . "<td>".$row['enabled']. "</td>" . "<td></td>" . "</tr>" . "<tr>" . "<td>Title ID</td>" . "<td>Name</td>" . "<td>Description</td>" . "<td>Image</td>" . "</tr>" ; foreach ( $prog_titles as $title ) { $sql2= mysql_query("SELECT * FROM titles WHERE title = '$title' "); $row2 = mysql_fetch_array($sql2); $table .= "<tr>" . "<td>" . $row2['id'] . "</td>" . "<td>" . $row2['title'] . "</td>" . "<td>" . $row2['description'] . "</td>" . "<td>". "<img width='50px' src='images/" . $row2['img'] . "'/></td>" . "</tr>" ; } // close foreach $table .= "</table>"; echo $table; echo "<br /><br /><br />"; } // close while ?> <br /> <br /> <FORM action="export.php"> <INPUT type="submit" value="Export to XLS"> <INPUT type="hidden" value="<?php print $table;?>" name="export"> </FORM> </body> </html> i am basically trying to retrieve the response of a chatbot from mysql database with query below. As i run script i don't get any error from the server but it seems the post doesn't take $data2 which is an array that includes the keys "user_id" and "text" that are normally accepted (eg: $dmessage->post('direct_messages/new/wrap_links=true', 'text'->'example', '12345'); As result of the above i can't post to Twitter the chatobot response as the recipient (my other twitter account) doesn't get the answer...what do you think? Code: [Select] include_once ('connect.php'); connect_to_database(); $query2 = mysql_query ("SELECT response FROM conversation_log WHERE id = (SELECT MAX(id) FROM conversation_log)") or die (mysql_error()); $row = mysql_fetch_row($query2); $response = $row[0]; //this is the array with the parameters to be used to send bot responses via Twitter API. It normally takes $data2 = array("text"=>"$response" , "user_id"=> "$userid"); //this modifies the array values with response e userid fields $data2["text"] = "$response"; $data2["user_id"] = "$userid"; require_once('config_oauth.php'); // includes the applications Oauth keys require_once($_SERVER['DOCUMENT_ROOT'].'Program-O/gui/xml/oauth/twitteroauth.php'); //Full path to twitteroauth.php library $dmessage = new TwitterOAuth($consumer_key,$consumer_secret, $oAuthToken, $oAuthSecret); // create new instance with the credentials //sends the bot response via Twitter API by going through the array $data2 $dmessage->post('direct_messages/new/wrap_links=true', $data2); can anyone help me as to whay I get this error: Problem with the query: INSERT INTO options (item_id, option ) VALUES('1', 'hi' ) You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'option ) VALUES('1', 'hi' )' at line 1 with this code: Code: [Select] foreach($_POST["user"] AS $key => $val) { $user = $val; $id1 = $_POST['id1'][$key]; $sql = "INSERT INTO options (item_id, option ) VALUES('$id1', '$user' )"; $rs = mysql_query($sql) or die ("Problem with the query: $sql <br />" . mysql_error()); } Code: [Select] <input type="checkbox" name="yes" id="checkme" /><div id = "extra"> <div id="user"> Enter User Names:<br> <input type="text" name="user[]"/><br></div> <div id="add_user" style="display: none;"><input type="text" name="user[]"/> |
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