note 35820 added to function.is-int

I think the function below is a robust test for integers working on all datatypes. It works by first checking that a number can be evaluated numerically, and then secondly that the integer evaluation matches the original number. Test cases are included. <? function myIsInt ($x) { return (is_numeric($x) ? intval($x) == $x : false); } function Test($x) { echo "$x is " . ( myIsInt($x) ? ('an integer. The integer value is ' . intval($x)) : 'not an integer.'); echo "\n"; } echo "These should be integers...\n"; Test(1); Test(5); Test(10); Test(10.0); Test(20.0); Test(-20.0); Test(0+4+4.5+4.5); Test("10.0"); Test("+14"); Test("-15"); Test("0"); echo "\nThese should not be integers...\n"; Test(true); // watch out, this displays as '1' Test(false); Test("moose"); Test("3.5"); Test("-214235.5"); Test(""); // empty string Test(array(1,2,3)); Test(dir('.')); // object Test(null); ?> ---- Manual Page -- http://www.php.net/manual/en/function.is-int.php Edit Note -- http://master.php.net/manage/user-notes.php?action=edit+35820 Delete Note -- http://master.php.net/manage/user-notes.php?action=delete+35820&report=yes Reject Note -- http://master.php.net/manage/user-notes.php?action=reject+35820&report=yes