Jan Walraven
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  • Posted on September 19, 2013

    Checks if all of the characters in the provided string, text, are alphanumeric.

    
    $strings = array('AbCd1zyZ9', 'foo!#$bar');
    foreach ($strings as $testcase) {
        if (ctype_alnum($testcase)) {
            echo "The string $testcase consists of all letters or digits.n";
        } else {
            echo "The string $testcase does not consist of all letters or digits.n";
        }
    }