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  1. <?php
  2.     $string = "1,1,1;2,5;3,4";
  3.     $tests = array("1,2,3;7,1,3;1", "1", "1;1;3;5;7;10;999", "1,1,1;2,5;3,4",
  4.                    "1,2,11", "9,99", "1,3,1");
  5.     foreach ($tests as $test) {
  6.         echo "$test: ";
  7.         if (!preg_match('/\b(\d+),[^;]*\b\1\b/', $test)) {
  8.             print_r(preg_split('/[,;]/', $test));
  9.         } else {
  10.             echo "No match\n";
  11.         }
  12.     }
Success #stdin #stdout 0.02s 20520KB
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1,2,3;7,1,3;1: Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 7
    [4] => 1
    [5] => 3
    [6] => 1
)
1: Array
(
    [0] => 1
)
1;1;3;5;7;10;999: Array
(
    [0] => 1
    [1] => 1
    [2] => 3
    [3] => 5
    [4] => 7
    [5] => 10
    [6] => 999
)
1,1,1;2,5;3,4: No match
1,2,11: Array
(
    [0] => 1
    [1] => 2
    [2] => 11
)
9,99: Array
(
    [0] => 9
    [1] => 99
)
1,3,1: No match
https://ideone.com/Y8xf1N
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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