How to Validate string if string is hex in php?

    This can be done in this way:-
    <?php
    $strings
    = array('AB10BC99', 'AR1012', 'ab12bc99');
    foreach (
    $strings as $testcase) {
        if (
    ctype_xdigit($testcase)) {
            echo
    "The string $testcase consists of all hexadecimal digits.\n";
        } else {
            echo
    "The string $testcase does not consist of all hexadecimal digits.\n";
        }
    }
    ?>
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    Average: 4 (1 vote)

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