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|
--TEST--
Test array_filter() function : usage variations - Different types of 'callback' function
--FILE--
<?php
/* Prototype : array array_filter(array $input [, callback $callback])
* Description: Filters elements from the array via the callback.
* Source code: ext/standard/array.c
*/
/*
* Passing different types of callback functions to array_filter()
* with parameters and return
* without parameter and with return
* with parameter and without return
* without parameter and without return
*/
echo "*** Testing array_filter() : usage variation - different 'callback' functions***\n";
// Initialize variables
$input = array(0, -1, 2, 3.4E-3, 'hello', "value", "key" => 4, 'null' => NULL);
// callback function without parameters and with return value
function callback1()
{
return 1;
}
echo "-- Callback function without parameter and with return --\n";
var_dump( array_filter($input, "callback1") );
// callback function with parameter and without return value
function callback2($input)
{
}
echo "-- Callback funciton with parameter and without return --\n";
var_dump( array_filter($input, "callback2") );
// callback function without parameter and without return value
function callback3()
{
}
echo "-- Callback function without parameter and return --\n";
var_dump( array_filter($input, "callback3") );
// callback function with parameter and with return value
function callback4($input)
{
if($input > 0 ) {
return true;
}
else {
return false;
}
}
echo "-- Callback function with parameter and return --\n";
var_dump( array_filter($input, "callback4") );
echo "Done"
?>
--EXPECTF--
*** Testing array_filter() : usage variation - different 'callback' functions***
-- Callback function without parameter and with return --
array(8) {
[0]=>
int(0)
[1]=>
int(-1)
[2]=>
int(2)
[3]=>
float(0.0034)
[4]=>
string(5) "hello"
[5]=>
string(5) "value"
["key"]=>
int(4)
["null"]=>
NULL
}
-- Callback funciton with parameter and without return --
array(0) {
}
-- Callback function without parameter and return --
array(0) {
}
-- Callback function with parameter and return --
array(3) {
[2]=>
int(2)
[3]=>
float(0.0034)
["key"]=>
int(4)
}
Done
|
