3v4l.org

run code in 300+ PHP versions simultaneously
<?php $text = '5453453 5345365647567,985735 34543534656 53464445656'; $phones = []; $lines = \preg_split('/' . PHP_EOL . '/', $text); foreach($lines as $line){ $phones[] = \explode(',', $line); } print_r($phones);

preferences:
65.47 ms | 402 KiB | 5 Q