Check for numeric character(s) with ctype_digit in PHP
Description
The following code shows how to check for numeric character(s) with ctype_digit.
Example
/*from w w w . j a v a 2s . c om*/
<?php
$numeric_string = '42';
$integer = 42;
ctype_digit($numeric_string); // true
ctype_digit($integer); // false (ASCII 42 is the * character)
is_numeric($numeric_string); // true
is_numeric($integer); // true
?>