How to clear server pictures in php

PHP clears images from the directory specified by the server

Steps:

1. Read the URL address of the database avatar
2. Get the valid fields of the URL address
3. Set the file path
4. Delete the image file

Thinkphp code is as follows:

public function delPic(){

    //获取前端传参 用户的uid
    $uid = I('uid');
    if(!$uid) $this->error('uid未获取');

    //获取url
    $url = M('Member')->where(array('uid'=>$uid))->getField('avatar');
    //$url = 'http://www.test.com/up/avatar/59b25bcfcaac6.jpg'
if(!$url) $this->error('数据库获取头像网址失败!');

    //获取$url有效字段（去掉网址）
    $str = substr($url, 20);//$str = 'up/avatar/59b25bcfcaac6.jpg'

    //file文件路径
    $filename = './'.$str;

    //删除
    if(file_exists($filename)){
        $info ='原头像删除成功';
        unlink($filename);
    }else{
        $info ='原头像没找到:'.$filename;
    }
    echo $info;
}

Recommended tutorial: PHP video tutorial

The above is the detailed content of How to clear server pictures in php. For more information, please follow other related articles on the PHP Chinese website!