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Error: Length parameter must be greater than 0

By: capitanqueso in PHP Tutorials on 2012年12月05日 [フレーム]

If you ever try to upload an empty file using fread(), php may show a nasty warning (according to your "error_reporting") about "Length parameter must be greater than 0" especially if you are parsing this as xml. So in order to handle this error from here you may do the next:

<?php 
$file = $_FILES['file']; 
$error_text = true; // Show text or number 
define("UPLOAD_ERR_EMPTY",5); 
 if($file['size'] == 0 && $file['error'] == 0){ 
 $file['error'] = 5; 
 } 
 $upload_errors = array( 
 UPLOAD_ERR_OK => "No errors.", 
 UPLOAD_ERR_INI_SIZE => "Larger than upload_max_filesize.", 
 UPLOAD_ERR_FORM_SIZE => "Larger than form MAX_FILE_SIZE.", 
 UPLOAD_ERR_PARTIAL => "Partial upload.", 
 UPLOAD_ERR_NO_FILE => "No file.", 
 UPLOAD_ERR_NO_TMP_DIR => "No temporary directory.", 
 UPLOAD_ERR_CANT_WRITE => "Can't write to disk.", 
 UPLOAD_ERR_EXTENSION => "File upload stopped by extension.", 
 UPLOAD_ERR_EMPTY => "File is empty." // add this to avoid an offset 
 ); 
 // error: report what PHP says went wrong 
 $err = ($error_text) ? $upload_errors[$file['error']] : $file['error'] ; 
 header("Content-Type: text/xml"); 
 echo '<errors> 
 <error>'. 
 $err .' 
 </error> 
 </errors> 
 '; 
 // Add your code to prevent fread() to run, either from here or with a previous "if" 
?>

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