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:
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//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(.*?)src=\"(.*?)\">/" , $old_contents , $match );
if (! empty ( $match [2])){
foreach ( $match [2] as $key => $value ){
array_push ( $oldPic , basename ( $value ));
}
}
preg_match_all( "/\<IMG(.*?)src=\"(.*?)\">/" , $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 );
}
}
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希望本文所述对大家的php程序设计有所帮助。