In what scenarios would it be advisable to use is_writable() function in PHP file handling operations?

The is_writable() function in PHP can be used to check if a file or directory is writable before attempting to write to it. This can help prevent errors or issues that may occur if the file is not writable. 

// Check if a file is writable before writing to it
$file = 'example.txt';

if (is_writable($file)) {
    // Open the file for writing
    $handle = fopen($file, 'w');
    
    // Write to the file
    fwrite($handle, 'Hello, world!');
    
    // Close the file
    fclose($handle);
    
    echo 'File written successfully!';
} else {
    echo 'File is not writable. Please check file permissions.';
}

Keywords

is_writable PHP file handling scenarios advisable

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