Arrays
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<?php
/**
* Sets every value from $extra that is not present in $base.
*
* This means that the first array is expanded by every key/value pair
* in $extra, *if* there is no such key in $base already. In other words,
* if you see $extra as a set of default values, the result will be those
* default values, overwritten by stuff from $base, plus any extra data
* in $base.
*
* @param array $base Array to fill up (add defaults to).
* @param array $extra The array with the extra (default) data.
* @return array $base with values from $extra added.
*/
function array_fillup($base, $extra) {
if (!is_array($base) || !is_array($extra)) return false;
foreach($extra as $k => $v) {
if(!isset($base[$k])) {
$base[$k] = $v;
}
elseif(is_array($base[$k])) {
$base[$k] = array_fillup($base[$k], $v);
}
}
return $base;
}
?>
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Usage Example
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// we have a webapp with some defaults...
// reading configuration (with help of PEAR Config,
// readConfigfile is a custom function)
$conf = readConfigfile('tbconfig.ini');
// set default values for unset variables in $_GET.
$config = array_fillup($_GET,$conf);
// now $config contains your defaults with stuff in
// $_GET overriding those defaults.
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