Flexible named and positional parameters for PHP

defaults.php

<?php

/**
 * Flexible named and positional parameters for PHP
 *
 * To use in your function, call it like this:
 *
 *  function your_function() {
 *  	$opts = defaults(func_get_args(),array(
 *          'some_param'=> 'default',
 *          'another_param'=> 'default',
 *          'yet_another_param => 'default'
 *          ), array('yet_another_param','another_param'));
 *      # ...
 *  }
 *
 * If you call your_function with an array as the first parameter, it will assume named parameters
 * Calling with anything else as the first parameter, positional parameters will be assumed
 *
 * $defaults is a hash mapping parameter names to default values
 * $positional is a list of key names map positional parameters to, if the calling function is called without an array as the first parameter
 */
function defaults($passed,$defaults = array(),$positional = array()) {
    if (count($passed) > 0 && !is_array($passed[0]) && $positional) {
        $orig = $passed;
        $passed = array();
        foreach ($orig as $v) {
            $k = array_shift($positional);
            $passed[0][$k] = $v;
        }
    }

    if (is_array($passed[0])) {
        $result = $passed[0];
    } else {
        $result = array();
    }

    foreach ($defaults as $k => $v) {
        $result[$k] = array_key_exists($k,$result) ? $result[$k] : $v;
    }
    return $result;
}

?>