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10 years ago

When using a php script like a remote function call, I find something like this useful for setting default parameters.

<?php
/**
/* combine _GET _POST _COOKIE variables with provided default values
/* defaults - associative array of default values
/* overwrite - if true, write result to _REQUEST superglobal
/* super_globals - array of super globals to fetch values from
**/
function get_params($defaults = null, $overwrite = false, $super_globals = array('_GET', '_POST', '_COOKIE'))
{
    $ret = array();

    // fetch values from request
    foreach($super_globals as $sg)
        foreach($GLOBALS[$sg] as $k=>$v)
            $ret[$k] = $v;

    // apply defaults for missing parameters
    if($defaults) foreach($defaults as $k=>$v)
        if(!isset($ret[$k]))
            $ret[$k] = $v;

    if($overwrite)
        $_REQUEST = $ret;

    return $ret;
}

// Example: page.php?style=modern

$argv = get_params(array('id'=>42, 'style'=>'medieval'));

// $argv['id'] = 42
// $argv['style'] = 'modern'

?>
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