JavaScript on a Valid XHTML page using CDATA

Best option: 
<script type="text/javascript">
/* <![CDATA[ */
var someScriptHere;
/* ]]> */
</script>
Can be written on one line: 
<script type="text/javascript">/* <![CDATA[ */var someScriptHere;/* ]]> */</script>
Further Testing: 
<?php
$javascript =
    'var foo = 1, bar = 2;' .
    'foo && bar;' .
    'alert("horray!");' .
    '';

// character "&" is the first character of a delimiter but occurred as data
// unescaped ampersand error
// xmlParseEntityRef: no name
// multiple lines
// alert works
$script_1A =
    '<script type="text/javascript">' . "\n" .
        $javascript . "\n" .
    '</script>' . "\n" .
    '';

// character "&" is the first character of a delimiter but occurred as data
// unescaped ampersand error
// xmlParseEntityRef: no name
// one line
// alert works
$script_1B =
    '<script type="text/javascript">' .
        $javascript .
    '</script>' .
    '';

// Valid XHTML 1.0 Strict
// multiple lines
// alert works
$script_2A =
    '<script type="text/javascript">' . "\n" .
    '//<![CDATA[' . "\n" .
        $javascript . "\n" .
    '//]]>' . "\n" .
    '</script>' . "\n" .
    '';

// Valid XHTML 1.0 Strict
// one line
// alert does not work (commented out)
$script_2B =
    '<script type="text/javascript">' .
    '//<![CDATA[' .
        $javascript .
    '//]]>' .
    '</script>' .
    '';

// Valid XHTML 1.0 Strict
// multiple lines
// alert works
$script_3A =
    '<script type="text/javascript">' . "\n" .
    '/* <![CDATA[ */' . "\n" .
        $javascript . "\n" .
    '/* ]]> */' . "\n" .
    '</script>' . "\n" .
    '';

// BEST OPTION
// Valid XHTML 1.0 Strict
// alert works
// one line
$script_3B =
    '<script type="text/javascript">' .
    '/* <![CDATA[ */' .
        $javascript .
    '/* ]]> */' .
    '</script>' .
    '';

echo
    '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">' .
    '<html xmlns="http://www.w3.org/1999/xhtml">' .
        '<head>' .
            '<meta http-equiv="content-type" content="text/html; charset=UTF-8" />' .
            '<title>page title</title>' .
        '</head>' .
        '<body>' .
/*
            $script_1A .
            $script_1B .
            $script_2A .
            $script_2B .
            $script_3A .
*/
            $script_3B .
/*
*/
        '</body>' .
    '</html>' .
    '';
NOTE: HTML5 doesn't need CDATA tags to validate. The following successfully validates: 
echo
    '<!doctype html>' .
    '<html>' .
        '<head>' .
            '<meta http-equiv="content-type" content="text/html; charset=UTF-8" />' .
            '<title>page title</title>' .
        '</head>' .
        '<body>' .
            $script_1A .
            $script_1B .
            $script_2A .
            $script_2B .
            $script_3A .
            $script_3B .
        '</body>' .
    '</html>' .
    '';

2 comments

  1. anonymous –

    Are you instructing or showing off?

  2. anonymous –

    cheers this helped me!

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