note 46509 added to function.is-numeric

is_numeric() in php5 returns false for strings with a leading decimal point: <?php is_numeric('5'); // true is_numeric('5.5'); // true is_numeric('.5'); // false // but... is_numeric('.0.5'); // true ?> In certain situations, it may be useful to prepend a '0' to the string you're verifying with is_numeric(): <?php if (is_numeric('0' . $user_input)) // ... ?> ---- Manual Page -- http://www.php.net/manual/en/function.is-numeric.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+46509 Delete -- http://master.php.net/manage/user-notes.php?action=delete+46509&report=yes Reason: bad code -- http://master.php.net/manage/user-notes.php?action=delete+46509&report=yes&reason=bad+code Reason: spam -- http://master.php.net/manage/user-notes.php?action=delete+46509&report=yes&reason=spam Reason: useless example -- http://master.php.net/manage/user-notes.php?action=delete+46509&report=yes&reason=useless+example Reason: contains commercial links -- http://master.php.net/manage/user-notes.php?action=delete+46509&report=yes&reason=contains+commercial+links Reason: useless note -- http://master.php.net/manage/user-notes.php?action=delete+46509&report=yes&reason=useless+note Reject -- http://master.php.net/manage/user-notes.php?action=reject+46509&report=yes Search -- http://master.php.net/manage/user-notes.php