3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = <<<STR 2234323,23,23,44,433;3,23,44,433;23,23,44,433;23,23,44,433;4534453,23,23,44,433; 3,23,44,433;23,23,44,433;23,23,44,433 7545455,23,23,44,433;3,23,44,433;23,23,44,433;23,23,44,433 STR; $string = preg_replace('/;?\R/', ';', $string); // I don't know if this is actually necessary for your real project var_export( preg_split('/;(?=\d{7}\b)/', $string) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.20, 8.3.0 - 8.3.8
array ( 0 => '2234323,23,23,44,433;3,23,44,433;23,23,44,433;23,23,44,433', 1 => '4534453,23,23,44,433;3,23,44,433;23,23,44,433;23,23,44,433', 2 => '7545455,23,23,44,433;3,23,44,433;23,23,44,433;23,23,44,433', )
preferences:
75.02 ms | 403 KiB | 126 Q