file_get_contents第二波！正则匹配很欢乐解决思路

file_get_contents第二波！正则匹配很欢乐
问题是这样的 file_get_contents 出来的内容是这样

.....

json

.....

ajax

....

php
/
mysql


我想得到的结果是

PHP code

<!--

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array("json","ajax","php+mysql");

求正则 正则实在是心头的一块隐痛.....

------解决方案--------------------

PHP code

$s = 
<a href="artist/001">json</a>

.....
<span class="singer" style="width: 95px;">
<a href="artist/002">ajax</a>
</span>
....
<span class="singer" style="width: 95px;">
<a href="artist/003">php</a>
<span>/</span>
<a href="artist/004">mysql</a>
</span>
TXT;

preg_match_all("/<span.>(.+)", $s, $r);
print_r($r[1]);
<br><font color="#e78608">------解决方案--------------------</font><br>
<dl class="code">PHP code<pre class="brush:php;toolbar:false">
 $s=
<a href="artist/001">json</a>

.....
<span class="singer" style="width: 95px;">
<a href="artist/002">ajax</a>
</span>
<span class="aa" style="width: 95px;">
<a href="artist/002">ajax</a>
</span>
....
<span class="singer" style="width: 95px;">
<a href="artist/003">php</a>
<span>/</span>
<a href="artist/004">mysql</a>
</span>
html;

 $s= str_replace('<span>/</span>','',$s);
preg_match_all('/<span class="singer">]*>(.*)/isU',$s,$m);
foreach($m[1] as $v){
    $v=preg_replace('/]+>/','',$v,-1,$count);
    if($count>2) $arr[]=join('+',preg_split("/[\r\n]+/",$v,-1,PREG_SPLIT_NO_EMPTY));
    else
              $arr[]=trim($v);    
}
print_r($arr); <div class="clear">
                 
              
              
        
            </div></span>