3v4l.org

run code in 300+ PHP versions simultaneously
<?php $address = "#&#&#&"; $delimiter = '#&'; if (preg_match('~^(?:' . preg_quote($delimiter) . ')+$~', $address)) { echo 'Text comprised solely of one or more delimiting substrings'; }
Output for 5.6.40, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Text comprised solely of one or more delimiting substrings

preferences:
75.69 ms | 990 KiB | 4 Q