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<sect2 id="zend.validate.set.hex">
    <title>Hex</title>

    <para>
        <classname>Zend_Validate_Hex</classname> allows you to validate if a given value contains
        only hexadecimal characters. These are all characters from <emphasis>0 to 9</emphasis> and
        <emphasis>A to F</emphasis> case insensitive. There is no length limitation for the input
        you want to validate.
    </para>

    <programlisting language="php"><![CDATA[
$validator = new Zend_Validate_Hex();
if ($validator->isValid('123ABC')) {
    // value contains only hex chars
} else {
    // false
}
]]></programlisting>

    <note>
        <title>Invalid characters</title>

        <para>
            All other characters will return false, including whitespace and decimal point. Also
            unicode zeros and numbers from other scripts than latin will not be treaten as valid.
        </para>
    </note>

    <sect3 id="zend.validate.set.hex.options">
        <title>Supported options for Zend_Validate_Hex</title>

        <para>
            There are no additional options for <classname>Zend_Validate_Hex</classname>:
        </para>
    </sect3>
</sect2>
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