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  1. <?php
  2. $str = '123=one; two;45=three=four;6=five;';
  3. if (preg_match_all('~(\d+)=(.+?);(?=\d|$)~', $str, $arr))
  4.    print_r($arr);	
  5. ?>
Success #stdin #stdout 0.01s 20568KB
comments (?)
stdin 
Standard input is empty
stdout 
Array
(
    [0] => Array
        (
            [0] => 123=one; two;
            [1] => 45=three=four;
            [2] => 6=five;
        )

    [1] => Array
        (
            [0] => 123
            [1] => 45
            [2] => 6
        )

    [2] => Array
        (
            [0] => one; two
            [1] => three=four
            [2] => five
        )

)
https://ideone.com/MG3BaO
language:
PHP (php 7.3.5)
created:
12 years ago
visibility:
public

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