这篇文章主要介绍了php实现修改新闻时删除图片的方法,涉及php正则替换的相关技巧,需要的朋友可以参考下
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();
$nowPic=array();
preg_match_all("/\/",$old_contents,$match);
if(!empty($match[2])){
foreach($match[2] as $key=>$value){
array_push($oldPic,basename($value));
}
}
preg_match_all("/\
/",$content,$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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