note 119140 added to function.is-numeric

If you want detect integer of float values, which presents as pure int or float, and presents as string values, use this functions: <?php function isInteger($val) { if (!is_scalar($val) || is_bool($val)) { return false; } if (is_float($val + 0) && ($val + 0) > PHP_INT_MAX) { return false; } return is_float($val) ? false : preg_match('~^((?:\+|-)?[0-9]+)$~', $val); } function isFloat($val) { if (!is_scalar($val)) { return false; } return is_float($val + 0); } foreach ([ '11111111111111111', 11111111111111111, // > PHP_INT_MAX - presents in PHP as float 1, '10', '+1', '1.1', 1.1, .2, 2., '.2', '2.', '-2.', '-.2', null, [], true, false, 'string' ] as $value) { echo $value . ':' . gettype($value) . ' is Integer? - ' . (isInteger($value) ? 'yes' : 'no') . PHP_EOL; echo $value . ':' . gettype($value) . ' is Float? - ' . (isFloat($value) ? 'yes' : 'no') . PHP_EOL; } ?> Output: 11111111111111111:string is Integer? - no 11111111111111111:string is Float? - yes 1,1111111111111E+16:double is Integer? - no 1,1111111111111E+16:double is Float? - yes 1:integer is Integer? - yes 1:integer is Float? - no 10:string is Integer? - yes 10:string is Float? - no +1:string is Integer? - yes +1:string is Float? - no 1.1:string is Integer? - no 1.1:string is Float? - yes 1,1:double is Integer? - no 1,1:double is Float? - yes 0,2:double is Integer? - no 0,2:double is Float? - yes 2:double is Integer? - no 2:double is Float? - yes .2:string is Integer? - no .2:string is Float? - yes 2.:string is Integer? - no 2.:string is Float? - yes -2.:string is Integer? - no -2.:string is Float? - yes -.2:string is Integer? - no -.2:string is Float? - yes :NULL is Integer? - no :NULL is Float? - no Array:array is Integer? - no Array:array is Float? - no 1:boolean is Integer? - no 1:boolean is Float? - no :boolean is Integer? - no :boolean is Float? - no string:string is Integer? - no string:string is Float? - no ---- Server IP: 72.52.91.14 Probable Submitter: 31.185.4.39 ---- Manual Page -- http://php.net/manual/en/function.is-numeric.php Edit -- https://master.php.net/note/edit/119140 Del: integrated -- https://master.php.net/note/delete/119140/integrated Del: useless -- https://master.php.net/note/delete/119140/useless Del: bad code -- https://master.php.net/note/delete/119140/bad+code Del: spam -- https://master.php.net/note/delete/119140/spam Del: non-english -- https://master.php.net/note/delete/119140/non-english Del: in docs -- https://master.php.net/note/delete/119140/in+docs Del: other reasons-- https://master.php.net/note/delete/119140 Reject -- https://master.php.net/note/reject/119140 Search -- https://master.php.net/manage/user-notes.php