2012年10月20日 星期六

PHP去除指定的html標籤





創建 test.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>無標題文件</title>
</head>

<body>
aaa
<strong>strong</strong>
bbb
<em>em</em>
ccc
<script type="text/javascript" src="/script1.js"></script>
<script type="text/javascript" src="/script2.js">/* inside script, same line */</script>
ccc
<script type="text/JavaScript">
/* inside script, change line */
</script>
ddd
</body>
</html>


php 程式碼

<?php
$filename = "test.html";
$handle  = fopen("$filename","r");
$Data = fread($handle, filesize($filename)); 
$newData = strip_only_tags($Data, 'script', 0);
fclose($handle );
print_r($newData);

function strip_only_tags($source, $tag, $stripContent=FALSE){
    
 //不成對的標籤
 $nonPair = array('img', 'br'); 
    if(in_array($tag, $nonPair)){
        $pattern = '#(<'.$tag.'(.*)>)#';
        $str = preg_replace($pattern, '', $str);
        continue;
    }
        
    $newData = '';
    $restData = $source;
    while(1){
        //找出起始標籤
        $pattern = '#<'.$tag.'[^>]*>#';
        $isMatch = preg_match($pattern, $restData, $matches);
        
        if($isMatch){
            $posStart = strpos($restData, $matches[0]);
            $len = strlen($matches[0]);
            $posEnd = $posStart + $len;
            $newData  .= substr($restData, 0, $posStart);
            $restData = substr($restData, $posEnd);
                
            //找出結尾標籤，並計算長度
            $pattern = '#</.*'.$tag.'[^>]*>#';
            preg_match($pattern, $restData, $matches);
            $endTag = $matches[0];
                
            $posStart = strpos($restData, $endTag);
            $len = strlen($endTag);
            $posEnd = $posStart + $len;
                
            if($stripContent==1){
                $newData .= substr($restData, 0, $posStart);
            }
            $restData = substr($restData, $posEnd);
                
        }else{
            $newData .= $restData;
            break;
        }
    }
    return $newData;
}
?>


結果

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>無標題文件</title>
</head>

<body>
aaa
<strong>strong</strong>
bbb
<em>em</em>
ccc


ccc

ddd
</body>
</html>
張貼者： 於

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