- print_r: documentation ( source)
- explode: documentation ( source)
- preg_split: documentation ( source)
<?php
$text = '5453453
5345365647567,985735
34543534656
53464445656';
$phones = [];
$lines = \preg_split('/' . PHP_EOL . '/', $text);
foreach($lines as $line){
$phones[] = \explode(',', $line);
}
print_r($phones);