Troubleshooting “Warning: session_start(): Cannot send session cache limiter - headers already sent”
i am getting Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at error
<-
The answer is above by Ross.
Firstly, putting session_start() as the first line of code will mean that you cannot deserialise any objects correctly into session variables.
The reason for getting this issue is 99% likely to be trailing spaces at the end of your include files (yes - I know it sounds unlikely but just try it). The offending file is in the error message. I wanted to back up Ross answer which worked for me but this site is counter intuitive.
IGNORE the nonsense answers. Remove the trailing spaces, newlines etc... and all will be well. ROSS knows what he is talking about. Putting session_start() at the top of your file DOES work but it isnt the correct solution.
讨论(0) -
In my case I had to set the file encoding without BOM.
讨论(0) -
You will find I have added the session_start() at the very top of the page. I have also removed the session_start() call later in the page. This page should work fine.
<?php session_start(); ?> <!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" /> <link href="style.css" rel="stylesheet" type="text/css" /> <title>Welcome</title> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> $(document).ready(function () { $('#nav li').hover( function () { //show its submenu $('ul', this).slideDown(100); }, function () { //hide its submenu $('ul', this).slideUp(100); } ); }); </script> </head> <body> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="header"> </td> </tr> <tr> <td class="menu"><table align="center" cellpadding="0" cellspacing="0" width="80%"> <tr> <td> <ul id="nav"> <li><a href="#">Catalog</a> <ul><li><a href="#">Products</a></li> <li><a href="#">Bulk Upload</a></li> </ul> <div class="clear"></div> </li> <li><a href="#">Purchase </a> </li> <li><a href="#">Customer Service</a> <ul> <li><a href="#">Contact Us</a></li> <li><a href="#">CS Panel</a></li> </ul> <div class="clear"></div> </li> <li><a href="#">All Reports</a></li> <li><a href="#">Configuration</a> <ul> <li><a href="#">Look and Feel </a></li> <li><a href="#">Business Details</a></li> <li><a href="#">CS Details</a></li> <li><a href="#">Emaqil Template</a></li> <li><a href="#">Domain and Analytics</a></li> <li><a href="#">Courier</a></li> </ul> <div class="clear"></div> </li> <li><a href="#">Accounts</a> <ul><li><a href="#">Ledgers</a></li> <li><a href="#">Account Details</a></li> </ul> <div class="clear"></div></li> </ul></td></tr></table></td> </tr> <tr> <td valign="top"><table width="80%" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="2"> <tr> <td width="22%" height="327" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="2"> <tr> <td> </td> </tr> <tr> <td height="45"><strong>-> Products</strong></td> </tr> <tr> <td height="61"><strong>-> Categories</strong></td> </tr> <tr> <td height="48"><strong>-> Sub Categories</strong></td> </tr> </table></td> <td width="78%" valign="top"><table width="100%" border="0" cellpadding="0" cellspacing="0"> <tr> <td> </td> </tr> <tr> <td> <table width="90%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="26%"> </td> <td width="74%"><h2>Manage Categories</h2></td> </tr> </table></td> </tr> <tr> <td height="30"> </td> </tr> <tr> <td> </td> </tr> <tr> <td> <table width="49%" align="center" cellpadding="0" cellspacing="0"> <tr><td> <?php if (isset($_SESSION['error'])) { echo "<span id=\"error\"><p>" . $_SESSION['error'] . "</p></span>"; unset($_SESSION['error']); } ?> <form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" enctype="multipart/form-data"> <p> <label class="style4">Category Name</label> <input type="text" name="categoryname" /><br /><br /> <label class="style4">Category Image</label> <input type="file" name="image" /><br /> <input type="hidden" name="MAX_FILE_SIZE" value="100000" /> <br /> <br /> <input type="submit" id="submit" value="UPLOAD" /> </p> </form> <?php require("includes/conn.php"); function is_valid_type($file) { $valid_types = array("image/jpg", "image/jpeg", "image/bmp", "image/gif", "image/png"); if (in_array($file['type'], $valid_types)) return 1; return 0; } function showContents($array) { echo "<pre>"; print_r($array); echo "</pre>"; } $TARGET_PATH = "images/category"; $cname = $_POST['categoryname']; $image = $_FILES['image']; $cname = mysql_real_escape_string($cname); $image['name'] = mysql_real_escape_string($image['name']); $TARGET_PATH .= $image['name']; if ( $cname == "" || $image['name'] == "" ) { $_SESSION['error'] = "All fields are required"; header("Location: managecategories.php"); exit; } if (!is_valid_type($image)) { $_SESSION['error'] = "You must upload a jpeg, gif, or bmp"; header("Location: managecategories.php"); exit; } if (file_exists($TARGET_PATH)) { $_SESSION['error'] = "A file with that name already exists"; header("Location: managecategories.php"); exit; } if (move_uploaded_file($image['tmp_name'], $TARGET_PATH)) { $sql = "insert into Categories (CategoryName, FileName) values ('$cname', '" . $image['name'] . "')"; $result = mysql_query($sql) or die ("Could not insert data into DB: " . mysql_error()); header("Location: mangaecategories.php"); exit; } else { $_SESSION['error'] = "Could not upload file. Check read/write persmissions on the directory"; header("Location: mangagecategories.php"); exit; } ?>讨论(0)
加载中...
- 热议问题