How can missing write permissions affect the functionality of "file_put_contents" in PHP?

If the user running the PHP script does not have write permissions on the specified file path, the "file_put_contents" function will fail to write to the file. To solve this issue, you can either grant the necessary write permissions to the user or change the file path to a location where the user has write permissions.

// Check if the file path has write permissions before using file_put_contents
if (is_writable('/path/to/file.txt')) {
    file_put_contents('/path/to/file.txt', 'Hello, World!');
} else {
    echo "Error: The file path does not have write permissions.";
}