How to delete uploaded images in php

How to delete uploaded images in php: first extract the file domain content name and judge; then write the value of "$img" to the corresponding field in the database; then read the image from the database; finally Just delete the image through the unlink function.

PHP implementation code for uploading pictures and deleting pictures. Friends in need can refer to it.

Upload pictures:

The code is as follows:

if (!empty($_FILES["img"]["name"])) { //提取文件域内容名称，并判断
$path=”uppic/”; //上传路径
if(!file_exists($path))
{
//检查是否有该文件夹，如果没有就创建，并给予最高权限
mkdir(“$path”, 0700);
}//END IF
//允许上传的文件格式
$tp = array(“image/gif”,”image/pjpeg”,”image/jpeg”);
//检查上传文件是否在允许上传的类型
if(!in_array($_FILES["img"]["type"],$tp))
{
echo “<script>alert(‘格式不对&#39;);history.go(-1);</script>”;
exit;
}//END IF
$filetype = $_FILES[&#39;img&#39;][&#39;type&#39;];
if($filetype == ‘image/jpeg&#39;){
$type = ‘.jpg&#39;;
}
if ($filetype == ‘image/jpg&#39;) {
$type = ‘.jpg&#39;;
}
if ($filetype == ‘image/pjpeg&#39;) {
$type = ‘.jpg&#39;;
}
if($filetype == ‘image/gif&#39;){
$type = ‘.gif&#39;;
}
if($_FILES["img"]["name"])
{
$today=date(“YmdHis”); //获取时间并赋值给变量
$file2 = $path.$today.$type; //图片的完整路径
$img = $today.$type; //图片名称
$flag=1;
}//END IF
if($flag) $result=move_uploaded_file($_FILES["img"]["tmp_name"],$file2);
//特别注意这里传递给move_uploaded_file的第一个参数为上传到服务器上的临时文件
}//END IF
//这里再将$img的值写入到数据库中对应的字段

Delete pictures:

The code is as follows:

unlink(“uppic/”.$img); //当然，变量的值是从数据库中读取出来的，PHP删除图片比ASP简洁多了

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