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<?php function check_type($value) { var_dump($value); return $value; } $values = [ null, false, true, 42, 45.15, 'hello', ['array1', 'array2', 15, 25], new stdClass(), gmp_init('4444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444444'), ]; foreach ($values as $value) { $filtered_var = filter_var($value, FILTER_CALLBACK, ['options' => 'check_type']); var_dump($filtered_var); }
Output for 8.1.0 - 8.1.31, 8.2.0 - 8.2.26, 8.3.0 - 8.3.14, 8.4.1
string(0) "" string(0) "" string(0) "" string(0) "" string(1) "1" string(1) "1" string(2) "42" string(2) "42" string(5) "45.15" string(5) "45.15" string(5) "hello" string(5) "hello" string(6) "array1" string(6) "array2" string(2) "15" string(2) "25" array(4) { [0]=> string(6) "array1" [1]=> string(6) "array2" [2]=> string(2) "15" [3]=> string(2) "25" } bool(false) bool(false)
preferences:
50.53 ms | 407 KiB | 5 Q