How to delete all file contents in php

php method to delete all file contents: first create a PHP sample file; then delete the folder and all files under the folder through the "public function deldir($dir) {...}" method .

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

How to delete all file contents with php?

PHP deletes the folder and all files under the folder

• Only deletes the files contained in the folder, not the folder

public function deldir($dir) {
//先删除目录下的文件：
$dh = opendir($dir);
while ($file = readdir($dh)) {
if($file != "." && $file!="..") {
$fullpath = $dir."/".$file;
if(!is_dir($fullpath)) {
unlink($fullpath);
} else {
deldir($fullpath);
}
}
}
closedir($dh);
}

• Delete the folder and all files under the folder

public function deldir($dir) {
//先删除目录下的文件：
$dh = opendir($dir);
while ($file = readdir($dh)) {
if($file != "." && $file!="..") {
$fullpath = $dir."/".$file;
if(!is_dir($fullpath)) {
unlink($fullpath);
} else {
deldir($fullpath);
}
}
}
closedir($dh);
//删除当前文件夹：
if(rmdir($dir)) {
return true;
} else {
return false;
}
}

• Create the folder and specify permissions and encoding

if (!is_dir($dir)){                                 //如果目录不存在
mkdir(iconv("UTF-8", "GBK", $dir),0777,true);   //创建目录,777权限,GBK编码格式
}

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