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php实现修改新闻时删除图片的方法_PHP

WBOY
WBOYOriginal
2016-06-01 11:05:45755browse

本文实例讲述了php实现修改新闻时删除图片的方法。分享给大家供大家参考。具体实现方法如下:

//old_contents:待修改的公告内容;
//$content:修改后的公告内容
$oldPic=array();
$nowPic=array();
preg_match_all("/\<IMG(.*&#63;)src=\"(.*&#63;)\">/",$old_contents,$match);
if(!empty($match[2])){
 foreach($match[2] as $key=>$value){
 array_push($oldPic,basename($value));
 }
}
preg_match_all("/\<IMG(.*&#63;)src=\"(.*&#63;)\">/",$content,$testpic);
if(!empty($testpic[2])){
 foreach($testpic[2] as $key=>$value){
 array_push($nowPic,basename($value));
 }
}
$intersectPic=array_intersect($nowPic,$oldPic);//计算交集
foreach($oldPic as $key=>$value){
 if(!in_array($value,$intersectPic)){
 $delPic="图片路径".$value
  unlink($delPic);
 }
}

希望本文所述对大家的php程序设计有所帮助。

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