- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
$value = "1234
4567
4568
4569
4560
3333AA
3334BB
";
$allowedInputSeparators = array('\r\n', '\n', '\s', ',', ';', '|');
foreach($allowedInputSeparators as $separator) {
echo "Testing "; var_dump($separator);
if(preg_match($separator, $value)) {
echo $separator . PHP_EOL;
}
}