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Test Php Highlight plugin

朋友Legend基于以前那个老高亮插件全新编写的PHP代码高亮显示插件，特点看来有：

不用替代实体字符（但是代码中间不能有</pre>）；
不用使用换行符；
超出行宽进行滚动显示（依靠CSS）
……

目前凭肉眼能看到这些，可能还有一些细节。根据我自己Blog的情况我定义了一点样式，效果如下：

[code lang=”php”]
< ?php
/*
Plugin Name: PHP Syntax Highlighter
Plugin URI: http://www.UGiA.cn
Description: highlight u php Syntax
Version: 0.1
Author: legend
Author URI: http://www.ugia.cn/
*/

function highlight_php($code)
{
// remove empty codes
if (trim($code) == '')
{
return '';
}

//remove smilies
$code = str_replace('"', '"', $code);

if (!is_array($codefind))
{
$codefind1 = array(
'
‘, //
to nothing
‘
‘ //
to nothing
);
$codereplace1 = array(
‘’,
‘’
);

$codefind2 = array(
‘>’, // > to >
‘<’, // < to < '"', // " to ",
'&', // & to &
);
$codereplace2 = array(
'>‘,
‘< ',
'"',
'&',
);
}

// remove htmlspecialchars'd bits and excess spacing
$code = trim(str_replace($codefind1, $codereplace1, $code));
$code = str_replace($codefind2, $codereplace2, $code); // finish replacements

// do we have an opening if (!preg_match('#^\s*<\s?\?#si', $code))
{
// if not, replace leading newlines and stuff in a $code = "“;
$addedtags = true;
}
else
{
$addedtags = false;
$code = preg_replace(”/^\s*< \s\?/isU", " $code = preg_replace("/<\/>$/isU”, “”, $code);
}

// highlight the string
$oldlevel = error_reporting(0);
if (PHP_VERSION >= ‘4.2.0′)
{
$buffer = highlight_string($code, fals);
}
else
{
@ob_start();
highlight_string($code);
$buffer = @ob_get_contents();
@ob_end_clean();
}
error_reporting($oldlevel);

// if we added tags above, now get rid of them from the resulting string
if ($addedtags)
{
$buffer = preg_replace(array(
‘#(< |<)\?.*php( | )BEGIN__PHP_SYNTAX_HIGLIGHTER #siU',
'#END__PHP_SYNTAX_HIGLIGHTER( | )\?(>|>)#siU’
), ‘’, $buffer);
}
$buffer = str_replace(’[', ‘[’, $buffer);
$buffer = preg_replace(”/< \/?code>/isU”, “”, $buffer);
$buffer = preg_replace(’/&#([0-9]+);/’, ‘&#$1;’, $buffer); // allow unicode entities back through
$buffer = preg_replace(’/ $buffer = preg_replace('/<\/FONT>/i’, ‘’, $buffer);

$code = &$buffer;

return $code;
}

if (function_exists(’add_filter’)) {
function __php_syntax_hilight($content)
{
return preg_replace_callback(”/

]*)>(.*?)< \/pre>/is”,
                                     ‘__php_syntax_hilight_callback’,
                                     $content);
    }
	
    function __php_syntax_hilight_callback($match)
    {
        $attr = $match[1];
        $code = $match[2];
	
        $code = str_replace(”“, “”, $code);
        $code = preg_replace(”/\s*

/s”, “\r\n\r\n”, $code);
        $code = preg_replace(”/< \/p>/s”, “”, $code);
        $code = str_replace(”“”, ‘”‘, $code);
        $code = str_replace(”””, ‘”‘, $code);
        $code = str_replace(”‘”, “‘”, $code);
        $code = str_replace(”’”, “‘”, $code);
        $code = str_replace(”–”, “–”, $code);
	
        // Try to match the
 tag, to determine what
        // programming language we need to hilight for,
	
        $re_lang = '/\s+lang\s*=\s*[\"']?([^\"']+)[\"']?/xi';
        $num = preg_match($re_lang, $attr, $lang);
        if ($num)
        {
            $code = highlight_php($code);
            $attr = preg_replace($re_lang, '', $attr);
            return $lang[1] == \"php\" ? \"
“.$code.”
” : “<pre$attr>$code</pre>”;
        }
        else
        {
            return “
	$code</pre>\";
        }
        //return \"
	$code</pre>\";
        //return $return;
    }
	
    add_filter('the_content', '__php_syntax_hilight');
}
?>[/code]
	
以上就是这个插件的源码，你COPY下来保存，传到插件目录激活就可以用了，再定义一点CSS，可以参看我的CSS样式。对了忘了说一点，使用时应该用<pre lang=”php”>标签。

2004-12-05 by Dark Posted in Plugins·插件