PHP folder creation code

Write a simple PHP code to create a folder. Write a simple PHP code to create a folder. first, obtain the path of the current directory, and then determine whether the folder exists. if the folder does not exist, the code is created. Define (DIR_ROOT, str_replace (\,,

First, obtain the path of the current directory, and then determine whether the folder exists. if it does not exist, it is created.

Define ('dir _ root', str_replace ('\', '/', dirname (_ FILE __))); // Obtain the physical path of the current file $ tmp_file_path = DIR_ROOT. '/tmp/'; // add the tmp directory path under the root directory if (is_dir ($ tmp_file_path) echo "tmp folder exists! "; Else {mkdir ($ tmp_file_path, 0700); // if the tmp directory does not exist, echo is created." The tmp folder does not exist. The creation is successful! "; // Not detected whether the creation is successful echo" tmp directory is ". $ tmp_file_path;}?>