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|
--TEST--
Test array_filter() function : usage variations - using the array keys inside 'callback'
--FILE--
<?php
/*
* Using array keys as an argument to the 'callback'
*/
echo "*** Testing array_filter() : usage variations - using array keys in 'callback' ***\n";
$input = array(0, 1, -1, 10, 100, 1000, 'Hello', null);
$small = array(123);
function dump($value, $key)
{
echo "$key = $value\n";
}
var_dump( array_filter($input, 'dump', true) );
echo "*** Testing array_filter() : usage variations - 'callback' filters based on key value ***\n";
function dump2($value, $key)
{
return $key > 4;
}
var_dump( array_filter($input, 'dump2', true) );
echo "*** Testing array_filter() : usage variations - 'callback' expecting second argument ***\n";
try {
var_dump( array_filter($small, 'dump', false) );
} catch (Throwable $e) {
echo "Exception: " . $e->getMessage() . "\n";
}
echo "*** Testing array_filter() with various use types ***\n";
$mixed = array(1 => 'a', 2 => 'b', 'a' => 1, 'b' => 2);
var_dump(array_filter($mixed, 'is_numeric', ARRAY_FILTER_USE_KEY));
var_dump(array_filter($mixed, 'is_numeric', 0));
try {
var_dump(array_filter($mixed, 'is_numeric', ARRAY_FILTER_USE_BOTH));
} catch (TypeError $e) {
echo $e->getMessage(), "\n";
}
echo "Done"
?>
--EXPECT--
*** Testing array_filter() : usage variations - using array keys in 'callback' ***
0 = 0
1 = 1
2 = -1
3 = 10
4 = 100
5 = 1000
6 = Hello
7 =
array(0) {
}
*** Testing array_filter() : usage variations - 'callback' filters based on key value ***
array(3) {
[5]=>
int(1000)
[6]=>
string(5) "Hello"
[7]=>
NULL
}
*** Testing array_filter() : usage variations - 'callback' expecting second argument ***
Exception: Too few arguments to function dump(), 1 passed and exactly 2 expected
*** Testing array_filter() with various use types ***
array(2) {
[1]=>
string(1) "a"
[2]=>
string(1) "b"
}
array(2) {
["a"]=>
int(1)
["b"]=>
int(2)
}
is_numeric() expects exactly 1 parameter, 2 given
Done
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