PHP $ DATA = "Abcdefghijk"; // Test string, length. The longer the running time, the longer the time, the longer preg_match_all ("/./",!
/ ** Recursive function, parameter $ AR data array $ M Complex length $ S Working Variables for cache ** / function foo ($ AR, $ M, $ S = ') {IF ($ M) {IF == 0) {Echo "$ S"; // If the length is enough, the result is the result} else {for ($ I = 0; $ I
Foo ($ AR, 5);?>