<?php
if (preg_match("/\[^_]+$/", "6654_2", $matches, PREG_OFFSET_CAPTURE)) {
echo $matches[0]+""+$matches[1];
} else {
echo "A match was not found.";
}
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
A match was not found.