note 114285 added to function.is-numeric

I think that is best check solution if u want to create real calculator for example :) <?php function is_number($var) { if ($var == (string) (float) $var) { return (bool) is_numeric($var); } if ($var >= 0 && is_string($var) && !is_float($var)) { return (bool) ctype_digit($var); } return (bool) is_numeric($var); } is_number(12); // true is_number(-12); // true is_number(-12.2); // true is_number("12"); // true is_number("-124.3"); // true is_number(0.8); // true is_number("0.8"); // true is_number(0); // true is_number("0"); // true is_number(NULL); // false is_number(true); // false is_number(false); // false is_number("324jdas32"); // false is_number("123-"); // false is_number(1e7); // true is_number("1e7"); // true is_number(0x155); // true is_number("0x155"); // false ?> ---- Server IP: 89.190.194.18 Probable Submitter: 46.10.53.32 ---- Manual Page -- http://php.net/manual/en/function.is-numeric.php Edit -- https://master.php.net/note/edit/114285 Del: integrated -- https://master.php.net/note/delete/114285/integrated Del: useless -- https://master.php.net/note/delete/114285/useless Del: bad code -- https://master.php.net/note/delete/114285/bad+code Del: spam -- https://master.php.net/note/delete/114285/spam Del: non-english -- https://master.php.net/note/delete/114285/non-english Del: in docs -- https://master.php.net/note/delete/114285/in+docs Del: other reasons-- https://master.php.net/note/delete/114285 Reject -- https://master.php.net/note/reject/114285 Search -- https://master.php.net/manage/user-notes.php