Closure Sample PHP >= 5.3

php_closure_sample.php

<?php
	# Closure Sample PHP >= 5.3
	
	$var = 'FRESH_';
	
	$func = function($str)  use ($var)
	{
		return $var.strtoupper($str);
	};
	
	var_dump($func); // object(Closure)
	
	$func2 = function($str)  use (&$var)
	{
		return $var.strtoupper($str);
	};
	
	$var = 'STALE_';
	
	$fruits = array('apple', 'orange', 'grape', 'pear');
	
	var_dump(array_map($func, $fruits));
	
	/*
	array(4) {
		[0]=>
		string(11) "FRESH_APPLE"
		[1]=>
		string(12) "FRESH_ORANGE"
		[2]=>
		string(11) "FRESH_GRAPE"
		[3]=>
		string(10) "FRESH_PEAR"
	}
	*/
	
	var_dump(array_map($func2, $fruits));
	
	/*
	array(4) {
		[0]=>
		string(11) "STALE_APPLE"
		[1]=>
		string(12) "STALE_ORANGE"
		[2]=>
		string(11) "STALE_GRAPE"
		[3]=>
		string(10) "STALE_PEAR"
	}
	*/