PHP fopen() Error: failed to open stream: Permission denied

This error message is indicating that the PHP script is trying to open a file using the fopen() function, but the script does not have the necessary permissions to access the file. The most common cause of this error is that the file or the directory containing the file has incorrect permissions set. To resolve this issue, you need to ensure that the file or directory has the correct permissions for the user or group that the PHP script is running as. This can typically be done by using chmod to set the correct permissions on the file or directory.

<?php

// Define the file path
$file = '/path/to/file.txt';

// Try to open the file for writing
$handle = fopen($file, 'w');

// Check if the file was successfully opened
if ($handle === false) {
    // Output the error message
    echo "Error: failed to open stream: Permission denied";
} else {
    // Output a success message
    echo "File was successfully opened for writing.";

    // Close the file handle
    fclose($handle);
}

?>