php怎么提取html标签？
通过php提取html标签
<?php/********************************** *　函数: tags*　功能: 从文件中提取html标签* *　入口:*　$filename 文件名*　$tag　标签名 *　返回:*　数组,每项为:*　 tagnamestring*　 text　 string*　 attrs　array* *　示例:*　print_r(tags("test1.htm","a"));*　print_r("http://localhost/index.htm","img");* */function tags($filename,$tag) {　$buffer = join("",file($filename));　$buffer = eregi_replace("\r\n","",$buffer);　$tagkey = sql_regcase($tag);　$buffer = eregi_replace("<$tagkey ","\n<$tag ",$buffer);　$ar = split("\n",$buffer);　foreach($ar as $v) {if(! eregi("<$tagkey ",$v)) continue;eregi("<$tagkey ([^>]*)((.*)</$tagkey)?",$v,$regs);$p[tagname] = strtoupper($tag);if($regs[3])　$p[text] = $regs[3];$s = trim(eregi_replace("[ \t]+"," ",$regs[1]))." ";$s = eregi_replace(" *= *","=",$s);$a = split(" ",$s);for($i=0;$i<count($a);$i++) {　$ch = array();　if(eregi("=[\"']",$a[$i])) {$j = $i+1;while(!eregi("[\"']$",$a[$i])) {　$a[$i] .= " ".$a[$j];　unset($a[$j]);}　}}foreach($a as $k) {　$name = strtoupper(strtok($k,"="));　$value = strtok("\0");　if(eregi("^[\"']",$value))$value = substr($value,1,-1);　if($name)$p[attrs][$name] = $value;}$pp[] = $p;　}　return $pp;}?>
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