Shorthand to check value in array

array_value_checking

<?php

//this array maps the function with the get parameters
$functions = array (
"action" => "do_actions" ,
"filter" => "do_filters"
);


foreach ($_GET as $key=>$value) {
        //check if this field is corresponding functions or not  
	if ( array_key_exists($key , $functions) ) {
		call_user_func($functions[$key] , $key,$value);
	}
}


function do_actions ($key , $value) {
        //place your code here to play with this value
	echo 'do_actions is called with ' . $key . 'and' . $value . "</br>";
}

function do_filters ($key , $value) {
        //place your code here to play with this value
	echo 'do_filters is called with ' . $key . ' and ' . $value .  "</br>";
}
 

?>