Bug #62155 [Opn->Nab]: empty () returns false for Countable objects with a count of 0

Edit report at https://bugs.php.net/bug.php?id=62155&edit=1 ID: 62155 Updated by: laruence@php.net Reported by: gordon dot mcvey at ntlworld dot com Summary: empty () returns false for Countable objects with a count of 0 -Status: Open +Status: Not a bug Type: Bug Package: SPL related PHP Version: 5.3.13 Block user comment: N Private report: N New Comment: Thank you for taking the time to write to us, but this is not a bug. Please double-check the documentation available at http://www.php.net/manual/ and the instructions on how to report a bug at http://bugs.php.net/how-to-report.php empty: Determine whether a variable is considered to be empty. Returns FALSE if var has a non-empty and non-zero value. The following things are considered to be empty: "" (an empty string) 0 (0 as an integer) 0.0 (0 as a float) "0" (0 as a string) NULL FALSE array() (an empty array) var $var; (a variable declared, but without a value in a class) http://www.php.net/manual/en/function.empty.php Previous Comments: ------------------------------------------------------------------------ [2012-05-25 10:16:13] gordon dot mcvey at ntlworld dot com Description: ------------ If you call empty() on an array with 0 elements, then it will return true. However, if you call empty() on a Countable object with a count of 0, it returns false. This could catch out people who are implementing objects with Countable as array stand-ins. Test script: --------------- <?php class Test implements Countable { public $count = 0; public function count () { return intval (abs ($this -> count)); } } $test = new Test (); var_dump (empty ($test)); var_dump (count ($test)); $test -> count = 10; var_dump (empty ($test)); var_dump (count ($test)); Expected result: ---------------- bool(true) int(0) bool(false) int(10) Actual result: -------------- bool(false) int(0) bool(false) int(10) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=62155&edit=1