ctype_alnum

PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8
ctype_alnum - Check for alphanumeric character(s)
Manual
Code Examples

Example #1 A ctype_alnum example (using the default locale)

Result: The string AbCd1zyZ9 consists of all letters or digits. The string foo!#$bar does not consist of all letters or digits.
<?php
$strings = array('AbCd1zyZ9', 'foo!#$bar');
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Function ctype_alnum:

Character type checking Functions

Most used PHP functions