What are common reasons for a PHP file upload error with an error code of '0'?

One common reason for a PHP file upload error with an error code of '0' is exceeding the maximum file size allowed by the server. To solve this issue, you can adjust the `upload_max_filesize` and `post_max_size` directives in your php.ini file to allow for larger file uploads. Another reason could be a temporary folder permission issue, where the server does not have write permissions to the temporary upload folder. In this case, you can change the permissions of the temporary folder to allow the server to write files. 

<?php
// Adjust maximum file size allowed
ini_set('upload_max_filesize', '20M');
ini_set('post_max_size', '25M');

// Check and change permissions of temporary upload folder
$temp_folder = ini_get('upload_tmp_dir');
if (!is_writable($temp_folder)) {
    chmod($temp_folder, 0755);
}
?>

Keywords

PHP file upload error code 0 file permissions server configuration

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