<?php
error_reporting(0);
function f($s){while(!$a&&++$i<strlen($s))for($j=0;$b=substr($s,$j++,$i);)strpos($s,$b)==strrpos($s,$b)&&($a[]=$b);return$a;}
echo "------\n";
var_dump(f("")); echo "\n"; // -> [""]
var_dump(f("abcaa")); // -> ["b","c"]
var_dump(f("rererere")); echo "\n"; // -> ["ererer"]
var_dump(f("asdfasdfd")); echo "\n"; // -> ["fa","fd"]
var_dump(f("ffffhhhhfffffhhhhhfffhhh")); echo "\n"; // -> ["hffff","fffff","hhhhh","hfffh"]
var_dump(f("asdfdfasddfdfaddsasadsasadsddsddfdsasdf")); echo "\n"; // -> ["fas","fad","add","fds"]
echo "------\n";
- Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
- ------
NULL
array(2) {
[0]=>
string(1) "b"
[1]=>
string(1) "c"
}
array(1) {
[0]=>
string(6) "ererer"
}
array(2) {
[0]=>
string(2) "fa"
[1]=>
string(2) "fd"
}
array(4) {
[0]=>
string(5) "hffff"
[1]=>
string(5) "fffff"
[2]=>
string(5) "hhhhh"
[3]=>
string(5) "hfffh"
}
array(4) {
[0]=>
string(3) "fas"
[1]=>
string(3) "fad"
[2]=>
string(3) "add"
[3]=>
string(3) "fds"
}
------
- Output for 8.3.5
- Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
------
NULL
array(2) {
[0]=>
string(1) "b"
[1]=>
string(1) "c"
}
array(1) {
[0]=>
string(6) "ererer"
}
array(2) {
[0]=>
string(2) "fa"
[1]=>
string(2) "fd"
}
array(4) {
[0]=>
string(5) "hffff"
[1]=>
string(5) "fffff"
[2]=>
string(5) "hhhhh"
[3]=>
string(5) "hfffh"
}
array(4) {
[0]=>
string(3) "fas"
[1]=>
string(3) "fad"
[2]=>
string(3) "add"
[3]=>
string(3) "fds"
}
------
- Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
- ------
NULL
array(2) {
[0]=>
string(1) "b"
[1]=>
string(1) "c"
}
NULL
array(1) {
[0]=>
string(2) "fd"
}
NULL
NULL
------
preferences:
219.15 ms | 402 KiB | 370 Q