PHP实现字符串的全排列详解_php技巧_

 string(7) "abc===0"array(0) { }string(7) "abc===1"array(0) { }string(7) "abc===2"array(0) { }string(7) "acb===1"array(1) { [0]=> string(3) "abc"}string(7) "acb===2"array(1) { [0]=> string(3) "abc"}string(7) "bac===0"array(2) { [0]=> string(3) "abc" [1]=> string(3) "acb"}string(7) "bac===1"array(2) { [0]=> string(3) "abc" [1]=> string(3) "acb"}string(7) "bac===2"array(2) { [0]=> string(3) "abc" [1]=> string(3) "acb"}string(7) "bca===1"array(3) { [0]=> string(3) "abc" [1]=> string(3) "acb" [2]=> string(3) "bac"}string(7) "bca===2"array(3) { [0]=> string(3) "abc" [1]=> string(3) "acb" [2]=> string(3) "bac"}string(7) "cba===0"array(4) { [0]=> string(3) "abc" [1]=> string(3) "acb" [2]=> string(3) "bac" [3]=> string(3) "bca"}string(7) "cba===1"array(4) { [0]=> string(3) "abc" [1]=> string(3) "acb" [2]=> string(3) "bac" [3]=> string(3) "bca"}string(7) "cba===2"array(4) { [0]=> string(3) "abc" [1]=> string(3) "acb" [2]=> string(3) "bac" [3]=> string(3) "bca"}string(7) "cab===1"array(5) { [0]=> string(3) "abc" [1]=> string(3) "acb" [2]=> string(3) "bac" [3]=> string(3) "bca" [4]=> string(3) "cba"}string(7) "cab===2"array(5) { [0]=> string(3) "abc" [1]=> string(3) "acb" [2]=> string(3) "bac" [3]=> string(3) "bca" [4]=> string(3) "cba"}array(6) { [0]=> string(3) "abc" [1]=> string(3) "acb" [2]=> string(3) "bac" [3]=> string(3) "bca" [4]=> string(3) "cba" [5]=> string(3) "cab"}