3v4l.org

run code in 300+ PHP versions simultaneously
<?php $signed_number_strings = ["--1", "---33", "+-444"]; foreach ($signed_number_strings as $string) { var_dump((int)preg_replace('~\++|-\+*-\+*~', '', $string)); }
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
int(1) int(-33) int(-444)
preferences:
128.38 ms | 407 KiB | 5 Q