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--TEST--
Test array_filter() function : usage variations - built-in functions as 'callback' argument
--FILE--
<?php
/*
* Passing built-in functions and different language constructs as 'callback' argument
*/
echo "*** Testing array_filter() : usage variations - built-in functions as 'callback' argument ***\n";
$input = array(0, 1, -1, 10, 100, 1000, null);
// using built-in function 'is_int' as 'callback'
var_dump( array_filter($input, 'is_int') );
// using built-in function 'chr' as 'callback'
var_dump( array_filter($input, 'chr') );
// using language construct 'echo' as 'callback'
try {
var_dump( array_filter($input, 'echo') );
} catch (TypeError $e) {
echo $e->getMessage(), "\n";
}
// using language construct 'exit' as 'callback'
try {
var_dump( array_filter($input, 'exit') );
} catch (TypeError $e) {
echo $e->getMessage(), "\n";
}
echo "Done"
?>
--EXPECT--
*** Testing array_filter() : usage variations - built-in functions as 'callback' argument ***
array(6) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(-1)
[3]=>
int(10)
[4]=>
int(100)
[5]=>
int(1000)
}
array(7) {
[0]=>
int(0)
[1]=>
int(1)
[2]=>
int(-1)
[3]=>
int(10)
[4]=>
int(100)
[5]=>
int(1000)
[6]=>
NULL
}
array_filter(): Argument #2 ($callback) must be a valid callback, function "echo" not found or invalid function name
array_filter(): Argument #2 ($callback) must be a valid callback, function "exit" not found or invalid function name
Done
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