PHP some well-packaged functions for folders

/** * Check if file name is valid * @param string $filename * @return Boolean*/functionCheckfilename ($filename){    $pattern= "/[\/,\*,<>,\?\|] /"; if(Preg_match($pattern,$filename )) {        return false; }Else{        return true; }}

<?PHP//Open the specified directory/** * Traverse directory functions to read only the outermost contents of the directory * @param string $path * @return Array*/functionReaddirectory ($path) {    $handle=Opendir($path );  while( ($item=Readdir($handle)) !==false ) {        //. and.. These 2 special directories        if($item! = "." &&$item!= "..") {            if(Is_file($path. "/" .$item )) {                $arr[' File '] [] =$item; }            if(Is_dir($path. "/" .$item )) {                $arr[' dir '] [] =$item; }                }    }    Closedir($handle ); return $arr;}//$path = "file";//print_r (Readdirectory ($path));/** * Get folder Size * @param string $path * @return int*/functionDirsize ($path){    $sum=0; Global $sum; $handle=Opendir($path);  while(($item=Readdir($handle))!==false){        if($item!="." &&$item!=".."){            if(Is_file($path." /".$item)){                $sum+=filesize($path." /".$item); }            if(Is_dir($path." /".$item)){                $func=__function__; $func($path." /".$item); }        }            }    Closedir($handle); return $sum;}//$path = "file";//echo dirsize ($path);functionCreateFolder ($dirname){    //checking the legality of folder names    if(Checkfilename (basename($dirname))){        //whether the folder name exists under the current directory with the same names        if(!file_exists($dirname)){            if(mkdir($dirname, 0777,true)){                $mes= "Folder creation succeeded"; }Else{                $mes= "Folder creation failed"; }        }Else{            $mes= "Same folder name exists"; }    }Else{        $mes= "Illegal folder name"; }    return $mes;}/** * Rename folder * @param string $oldname * @param string $newname * @return String*/functionRenamefolder ($oldname,$newname){    //checking the legality of folder names    if(Checkfilename (basename($newname))){        //detects if there is a folder name with the same names in the current directory        if(!file_exists($newname)){            if(Rename($oldname,$newname)){                $mes= "Rename succeeded"; }Else{                $mes= "Rename Failed"; }        }Else{            $mes= "There is a folder with the same name"; }    }Else{        $mes= "Illegal folder name"; }    return $mes;}functionCopyFolder ($src,$DST){    //echo $src, "---", $dst. " ----";    if(!file_exists($DST)){        mkdir($DST, 0777,true); }    $handle=Opendir($src);  while(($item=Readdir($handle))!==false){        if($item!="." &&$item!=".."){            if(Is_file($src." /".$item)){                Copy($src." /".$item,$DST." /".$item); }            if(Is_dir($src." /".$item)){                $func=__function__; $func($src." /".$item,$DST." /".$item); }        }    }    Closedir($handle); return"Copy succeeded"; }/** * Cut folder * @param string $src * @param string $DST * @return String*/functionCutfolder ($src,$DST){    //Echo $src, "--", $DST;    if(file_exists($DST)){        if(Is_dir($DST)){            if(!file_exists($DST." /".basename($src))){                if(Rename($src,$DST." /".basename($src))){                    $mes= "Cut Successfully"; }Else{                    $mes= "Cut Failed"; }            }Else{                $mes= "There is a folder with the same name"; }        }Else{            $mes= "Not a folder"; }    }Else{        $mes= "Destination folder does not exist"; }    return $mes;}/** * Delete folder * @param string $path * @return String*/functionDelfolder ($path){    $handle=Opendir($path);  while(($item=Readdir($handle))!==false){        if($item!="." &&$item!=".."){            if(Is_file($path." /".$item)){                unlink($path." /".$item); }            if(Is_dir($path." /".$item)){                $func=__function__; $func($path." /".$item); }        }    }    Closedir($handle); rmdir($path); return"Folder deletion succeeded";}

PHP some well-packaged functions for folders