Find all functions in a file and return it's names in array

Functions-in-file.php

<?php

//--------------------------------
// Example usage:
//--------------------------------
print "<pre>";
print_r( functions_in_file(__FILE__) );

//--------------------------------
// Find functions in a file:
//--------------------------------
function functions_in_file($file, $sort = FALSE) {

    $file = join("\n",file($file));
    preg_match_all('/function\s+(\w+)/', $file, $m);
    $functions = $m[1];
    if ($sort) {
        asort($functions);
    }
    return $functions;
}

?>