What could be the potential reasons for the "Warning: fopen()...failed to open stream: No such file or directory" error in a PHP script?

The "Warning: fopen()...failed to open stream: No such file or directory" error in a PHP script typically occurs when the file path provided to the fopen() function does not exist or is incorrect. To solve this issue, ensure that the file path is accurate and the file you are trying to open actually exists in the specified location.

$file_path = 'path/to/your/file.txt';

if (file_exists($file_path)) {
    $file = fopen($file_path, 'r');
    // Continue with file operations
} else {
    echo "File does not exist.";
}