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<sect1 id="zend.version.reading">
    <title>Getting the Zend Framework Version</title>

    <para>
        <classname>Zend_Version</classname> provides a class constant
        <constant>Zend_Version::VERSION</constant> that contains a string
        identifying the version number of your Zend Framework installation.
        <constant>Zend_Version::VERSION</constant> might contain "1.7.4", for example.
    </para>

    <para>
        The static method <methodname>Zend_Version::compareVersion($version)</methodname>
        is based on the <acronym>PHP</acronym> function <ulink
            url="http://php.net/version_compare"><methodname>version_compare()</methodname></ulink>.
        This method returns -1 if the specified version
        is older than the installed Zend Framework version, 0 if they are the same
        and +1 if the specified version is newer than the
        version of the Zend Framework installation.
    </para>

    <example id="zend.version.reading.example">
        <title>Example of the compareVersion() Method</title>

        <programlisting language="php"><![CDATA[
// returns -1, 0 or 1
$cmp = Zend_Version::compareVersion('2.0.0');
]]></programlisting>
    </example>

    <para>
        The static method <methodname>Zend_Version::getLatest()</methodname> provides the version
        number of the last stable release available for download on the site
        <ulink url="http://framework.zend.com/download/latest">Zend Framework</ulink>.
    </para>

    <example id="zend.version.latest.example">
        <title>Example of the getLatest() Method</title>

        <programlisting language="php"><![CDATA[
// returns 1.11.0 (or a later version)
echo Zend_Version::getLatest();
]]></programlisting>
    </example>
</sect1>
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