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--TEST--
Test array_walk() function : usage variations - 'input' argument containing reference variables
--FILE--
<?php
/* Prototype : bool array_walk(array $input, string $funcname [, mixed $userdata])
* Description: Apply a user function to every member of an array
* Source code: ext/standard/array.c
*/
/*
* Testing array_walk() with an array having reference variables
*/
echo "*** Testing array_walk() : array with references ***\n";
$value1 = 10;
$value2 = -20;
$value3 = &$value1;
$value4 = 50;
// 'input' array containing references to above variables
$input = array(&$value1, &$value2, -35, &$value3, 0, &$value4);
// callback function
/* Prototype : callback(int $value, mixed $key)
* Parameters : $value - values in given input array
* $key - keys in given input array
* Description : function checks for the value whether positive or negative and displays according to that
*/
function callback($value, $key)
{
// dump the arguments to check that they are passed
// with proper type
var_dump($key); // key
var_dump($value); // value
echo "\n"; // new line to separate the output between each element
}
var_dump( array_walk($input, "callback"));
echo "Done"
?>
--EXPECTF--
*** Testing array_walk() : array with references ***
int(0)
int(10)
int(1)
int(-20)
int(2)
int(-35)
int(3)
int(10)
int(4)
int(0)
int(5)
int(50)
bool(true)
Done