PHP - Html Transfer Code超文本转换码，市面上这东西已经很滥（多）了，不过是这几天自己实践了一下~~~~

支持 多重嵌套 和 同标签嵌套，混合高亮显示（还有一点小问题）

自我感觉便于修改和扩充~~~~~~~~~~~

<?php
/**************************************************
* *
* Name : Functions 4 Html Transfer Code (HTC)*
* Version : 1.3.2 *
* Author: Windy_sk *
* Create: 2003-09-03 *
* Modified: 2003-12-17 *
* Email : windy_sk@126.com *
* HomePage: None (Maybe Soon) *
* Notice: U Can Use & Modify it freely, *
* BUT PLEASE HOLD THIS ITEM. *
* *
**************************************************/

$htc_list = array(
"B" => "<b>\\1</b>",
"I" => "<i>\\1</i>",
"U" => "<u>\\1</u>",
"CENTER" => "<center>\\1</center>\n",
"URL" => "<a href='\\1'>\\1</a>",
"EMAIL" => "<a href='mailto:\\1'>\\1</a>",
"IMAGE" => "<br /><table align=center width='100%'><tr><td align='center'><img src='\\1' border='0' onload='org_w=this.offsetWidth;this.style.width=10;this.style.width=(org_w>parseInt(this.offsetParent.offsetWidth))?this.offsetParent.offsetWidth:org_w' onclick='window.open(this.src)' style='cursor:pointer' /></td></tr></table><br />\n",
"DOWNLOAD" => "exec:get_dl_html('\\1')",
"LIST" => "exec:get_list_html('\\1')",
"QUOTE" => "<center><table border='0' width='90%' cellspacing='0' cellpadding='0'><tr><td>&nbsp; 引用：</td></tr><tr><td><table width='100%' class='quote'><tr><td>\\1</td></tr></table></td></tr></table></center>\n",
"IFRAME" => "<table align=center><tr><td><iframe src='\\1' frameborder='0' allowtransparency='true' scrolling='yes' width='400' height='300'></iframe></td></tr></table>\n",
"MOVE" => "<center><marquee width='90%' behavior='alternate' scrollamount='3'>\\1</marquee><center>\n",
"GLOW" => "<table><tr><td class='glow'>\\1</td></tr></table>\n",
"SHADOW" => "<table><tr><td class='shadow'>\\1</td></tr></table>\n",
"DROPSHADOW" => "<table><tr><td class='dropshadow'>\\1</td></tr></table>\n",
"GBMUSIC" => "<bgsound src='\\1' loop='-1'>\n",
"MUSIC" => "<TABLE cellSpacing=0 cellPadding=0 align=center border=0><TBODY><TR><TD vAlign=top colSpan=3><EMBED name=music_rm align=top src='\\1' width='200' height='30' type='audio/x-pn-realaudio-plugin' console='ClipNN' loop='false' autostart='false' controls='ControlPanel' border='1' vspace='0' hspace='0'></EMBED><br><STRONG><A href='\\1'>Download The Music</A></STRONG></TD></TR></TBODY></TABLE>\n",
"FLASH" => "<table align=center><tr><td><object classid='clsid:D27CDB6E-AE6D-11cf-96B8-444553540000' codebase='http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0' width='400'><param name='movie' value='\\1'><param name='quality' value='high'><embed src='\\1' quality='high' pluginspage='http://mand('saveas','','code.html');code_win.close();\">
（提示:可以先修改部分代码）
</td></tr>
</table>";
}


function get_list_html($content, $type = "") {
$content = preg_replace("/(<br \/>)?[\r\n]+/", "\n", $content);
$content = preg_replace("/[\r\n]+/", "\n", $content);
$content = preg_replace("/^[\n]*(.*)[\n]*$/m", "\\1", $content);
$content = str_replace("\n", "</li><li>", $content);
$content = "<ul type='$type'><li>$content</li></ul>\n";
return $content;
}


function html_trans($str) {
$search= array("&", "'", "\"", "<", ">", "", "\t");
$replace = array("&amp;", "&#39;", "&quot;", "&lt;", "&gt;", "&nbsp; ", "&nbsp; &nbsp; ");
return nl2br(str_replace($search, $replace, $str));
}


function link_url($str) {
$str = preg_replace("/((http|ftp|mms|rtsp|pnm|mailto):\/\/[\w@:\.\/\?=&;#\-%]+)/i", "<a href='\\1' target='_blank'>\\1</a>", $str);
$str = preg_replace("/(\w+@(\w+\.)+[\w]{2,3})/i", "<a href='mailto:\\1'>\\1</a>", $str);
$str = preg_replace("/(href|src)='<a href=('.+')>[^<]+<\/a>'/iU", "\\1=\\2", $str);
return $str;
}


function htc2html_loop($str) {
global $htc_list, $htc_list_att;
foreach($htc_list as $key => $value) {
if(substr($value,0,5)=="exec:"){
$str = preg_replace("/\[$key\]((.(?!\[$key(\s?=\s?([^\]]+))?\]))*)\[\/$key\]/iexsU", substr($value,5), $str);
} else {
$str = preg_replace("/\[$key\]((.(?!\[$key(\s?=\s?([^\]]+))?\]))*?)\[\/$key\]/ixsU", "$value", $str);
}
}
foreach($htc_list_att as $key => $value) {
if(substr($value,0,5)=="exec:"){
$str = preg_replace("/\[$key\s?=\s?([^\]]+)\]((.(?!\[$key(\s?=\s?([^\]]+))?\]))*)\[\/$key\]/iesxU", substr($value,5), $str);
} else {
$str = preg_replace("/\[$key\s?=\s?([^\]]+)\]((.(?!\[$key(\s?=\s?([^\]]+))?\]))*)\[\/$key\]/isxU", "$value", $str);
}
}
return $str;
}


function htc2html($str, $trans_url = true , $loop = 3) {
global $htc_list_spl;
$str = preg_replace("/(\[\w+\])\s*/ixs","\\1",$str);
$str = preg_replace("/\s*(\[\/\w+\])/ixs","\\1",$str);
foreach($htc_list_spl as $key => $value) {
preg_match_all("/\[$key\](.*)\[\/$key\]/ixsU", $str, $arr_tmp);
$arr_spl[$key] = $arr_tmp[0];
for($i=0; $i<count($arr_spl[$key]); $i++) {
$str = str_replace($arr_spl[$key][$i], "
::{$key}_{$i}::
", $str);
if(substr($value,0,5)=="exec:"){
$arr_spl[$key][$i] = preg_replace("/\[$key\](.*)\[\/$key\]/iexsU", substr($value,5), $arr_spl[$key][$i]);
} else {
$arr_spl[$key][$i] = preg_replace("/\[$key\](.*)\[\/$key\]/ixsU", "$value", $arr_spl[$key][$i]);
}
}
}
$str = html_trans($str);
while($loop-- > 0) {
if(!preg_match("/\[(\w+)(\s?=\s?([^\]]+))?\](.*)\[\/\\1\]/isU", $str)) break;
$str = htc2html_loop($str);
}
if($trans_url) $str = link_url($str);
foreach($htc_list_spl as $key => $value) {
for($i=0; $i<count($arr_spl[$key]); $i++) {
$str = str_replace("
::{$key}_{$i}::
", $arr_spl[$key][$i], $str);
}
}
return $str;
}
?>



使用方法：

echo htc2html($str);

OK 了~~~~~~~~