Online PHP editor | output for 8l9Vj

<?php function contextCheck( $context = false ) { # URL Paremeter Checker # If the infomation passed is a string and isn't empty, grab URL paremeter if( !empty( $context ) and is_string( $context ) ) { # Check if the URL Parameter even exists if ( isset( $_GET["{$context}"] ) ) { $URL_Parameter = $_GET["{$context}"]; # If the URL Parameter is a string and isn't empty, return true if( !empty( $URL_Parameter ) and is_string( $URL_Parameter ) ) { return $URL_Parameter; } } } else { return false; } } $_GET['foo' => '12']; $_GET['bar' => '0']; print( contextCheck( 'foo' ) ); print( contextCheck( 'bar' ) ); ?>