Three ways to delete directory files in PHP

1, pass the law: the use of recursive layers of delete.

The following is quoted content:
deleteDir ($ dir)
{
if (rmdir ($ dir) == false && is_dir ($ dir)) {
if ($ dp = opendir ($ dir)) {
while (($ file = readdir ($ dp))! = false) {
if (is_dir ($ file) && $ file! = '.' && $ file! = '..') {
deleteDir ($ file);
} else {
unlink ($ file);
}
}
closedir ($ dp);
} else {
exit ('Not permission');
}
}
}

2, the system call method

The following is quoted content:
function del_dir ($ dir)
{
if (strtoupper (substr (PHP_OS, 0, 3)) == 'WIN') {
$ str = "rmdir / s / q". $ dir;
} else {
$ str = "rm -Rf". $ dir;
}
}

3, circulation method

The following is quoted content:
function deltree ($ pathdir)
{
Echo $ pathdir; / ​​/ debug time
if (is_empty_dir ($ pathdir)) // if empty
{
rmdir ($ pathdir); / / delete directly
}
else
{// Otherwise read this directory, except .. and .. outside
$ d = dir ($ pathdir);
while ($ a = $ d-> read ())
{
if (is_file ($ pathdir. '/'. $ a) && ($ a! = '.') && ($ a! = '..')) {unlink ($ pathdir. '/'. $ a); }
// If the file is deleted directly
if (is_dir ($ pathdir. '/'. $ a) && ($ a! = '.') && ($ a! = '..'))
{// if it is a directory
if (! is_empty_dir ($ pathdir. '/'. $ a)) // is empty
{// If not, call itself, but the original path + his subordinate directory name
deltree ($ pathdir. '/'. $ a);
}
if (is_empty_dir ($ pathdir. '/'. $ a))
{// If it is empty, delete it
rmdir ($ pathdir. '/'. $ a);
}
}
}
$ d-> close ();
Echo "must first delete all the files in the directory"; / / I used when debugging
}
}
function is_empty_dir ($ pathdir)
{
// to determine whether the directory is empty
$ d = opendir ($ pathdir);
$ i = 0;
while ($ a = readdir ($ d))
{
$ i ++;
}
closedir ($ d);
if ($ i> 2) {return false;}
else return true;
}