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|
--TEST--
Test array_map() function : usage variations - callback function with different return types
--FILE--
<?php
/* Prototype : array array_map ( callback $callback , array $arr1 [, array $... ] )
* Description: Applies the callback to the elements of the given arrays
* Source code: ext/standard/array.c
*/
/*
* Test array_map() by passing different callback function returning:
* int, string, bool, null values
*/
echo "*** Testing array_map() : callback with diff return value ***\n";
$array1 = array(1, 2, 3);
$array2 = array(3, 4, 5);
echo "-- with integer return value --\n";
function callback_int($a, $b)
{
return $a + $b;
}
var_dump( array_map('callback_int', $array1, $array2));
echo "-- with string return value --\n";
function callback_string($a, $b)
{
return "$a"."$b";
}
var_dump( array_map('callback_string', $array1, $array2));
echo "-- with bool return value --\n";
function callback_bool($a, $b)
{
return TRUE;
}
var_dump( array_map('callback_bool', $array1, $array2));
echo "-- with null return value --\n";
function callback_null($array1)
{
return NULL;
}
var_dump( array_map('callback_null', $array1));
echo "-- with no return value --\n";
function callback_without_ret($arr1)
{
echo "callback_without_ret called\n";
}
var_dump( array_map('callback_without_ret', $array1));
echo "Done";
?>
--EXPECTF--
*** Testing array_map() : callback with diff return value ***
-- with integer return value --
array(3) {
[0]=>
int(4)
[1]=>
int(6)
[2]=>
int(8)
}
-- with string return value --
array(3) {
[0]=>
string(2) "13"
[1]=>
string(2) "24"
[2]=>
string(2) "35"
}
-- with bool return value --
array(3) {
[0]=>
bool(true)
[1]=>
bool(true)
[2]=>
bool(true)
}
-- with null return value --
array(3) {
[0]=>
NULL
[1]=>
NULL
[2]=>
NULL
}
-- with no return value --
callback_without_ret called
callback_without_ret called
callback_without_ret called
array(3) {
[0]=>
NULL
[1]=>
NULL
[2]=>
NULL
}
Done
|
