5 views 
Syntax Syntax
Parameters Parameters
- $numberstring
-
(Required)
- $allowdecimal
-
(Optional)
Default value: false
- $allownegative
-
(Optional)
Default value: false
Return Return
(bool)
Source Source
File: wp-includes/ID3/module.tag.id3v2.php
/**
* @param string $numberstring
* @param bool $allowdecimal
* @param bool $allownegative
*
* @return bool
*/
public static function IsANumber($numberstring, $allowdecimal=false, $allownegative=false) {
for ($i = 0; $i < strlen($numberstring); $i++) {
if ((chr($numberstring[$i]) < chr('0')) || (chr($numberstring[$i]) > chr('9'))) {
if (($numberstring[$i] == '.') && $allowdecimal) {
// allowed
} elseif (($numberstring[$i] == '-') && $allownegative && ($i == 0)) {