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|
--TEST--
Test array_filter() function : usage variations - Callback function with different return values
--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
*/
/*
* callback functions are expected to return bool value for array_filter()
* here testing callback functions for return values other than bool
*/
echo "*** Testing array_filter() : usage variations - callback function with different return values***\n";
$input = array(0, 1, -1, 10, 100, 1000, 'Hello', null, true);
// callback functions
// int as return value
function callback1($input)
{
return 5;
}
echo "callback function with int return value\n";
var_dump( array_filter($input, 'callback1') );
// float as return value
function callback2($input)
{
return 3.4;
}
echo "callback function with float return value\n";
var_dump( array_filter($input, 'callback2') );
// string as return value
function callback3($input)
{
return 'value';
}
echo "callback function with string return value\n";
var_dump( array_filter($input, 'callback3') );
// null as return value
function callback4($input)
{
return null;
}
echo "callback function with null return value\n";
var_dump( array_filter($input, 'callback4') );
// array as return value
function callback5($input)
{
return array(8);
}
echo "callback function with array as return value\n";
var_dump( array_filter($input, 'callback5') );
echo "Done"
?>
--EXPECTF--
*** Testing array_filter() : usage variations - callback function with different return values***
callback function with int return value
array(9) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(-1)
[3]=>
int(10)
[4]=>
int(100)
[5]=>
int(1000)
[6]=>
string(5) "Hello"
[7]=>
NULL
[8]=>
bool(true)
}
callback function with float return value
array(9) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(-1)
[3]=>
int(10)
[4]=>
int(100)
[5]=>
int(1000)
[6]=>
string(5) "Hello"
[7]=>
NULL
[8]=>
bool(true)
}
callback function with string return value
array(9) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(-1)
[3]=>
int(10)
[4]=>
int(100)
[5]=>
int(1000)
[6]=>
string(5) "Hello"
[7]=>
NULL
[8]=>
bool(true)
}
callback function with null return value
array(0) {
}
callback function with array as return value
array(9) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(-1)
[3]=>
int(10)
[4]=>
int(100)
[5]=>
int(1000)
[6]=>
string(5) "Hello"
[7]=>
NULL
[8]=>
bool(true)
}
Done
|
