fix: Fix php_container.php helper script

Author: markmetcalfe

bin/helpers/php_container.php

@@ -27,12 +27,13 @@
 // Get all the possible containers that could be started
 $php_containers_matches = array();
 preg_match_all("/php-([0-9]\.[0-9])[^:]*:/", file_get_contents("$docker_dev_root/compose/php.yml"), $php_containers_matches);
-preg_match_all("/php-([0-9]\.[0-9])[^:]*:/", file_get_contents("$docker_dev_root/compose/php-legacy.yml"), $php_containers_matches);
+$php_legacy_containers_matches = array();
+preg_match_all("/php-([0-9]\.[0-9])[^:]*:/", file_get_contents("$docker_dev_root/compose/php-legacy.yml"), $php_legacy_containers_matches);
 if (empty($php_containers_matches)) {
     fwrite(fopen('php://stderr', 'wb'), "Fatal regex error" . PHP_EOL);
     exit(1);
 }
-$php_containers_available = array_unique($php_containers_matches[1]);
+$php_containers_available = array_merge(array_unique($php_containers_matches[1]), array_unique($php_legacy_containers_matches[1]));
 asort($php_containers_available);
 
 // Get the versions to use from the site composer.json (if it exists)