PHP code to create multi-level directories

 function create_dir($path,$mode)
 {
 if (is_dir($path)){ //Determine whether the directory exists, if it exists, do not create it
 echo "Directory'" . $path . "'already exists" ;
 }
 else
 { //There is no creation
 $re=mkdir($path,$mode,true); //The third parameter is true to create a multi-pole directory
 if ($re){
 echo "Directory creation successful";
 }else{
 echo "Directory creation failed";
 }
 }
 }
 $path="aa/bb/cc/cd"; //The directory to be created
 $mode=0755; //Create directory mode
 create_dir($path,$mode);//Test

php