fix: fix various PHP problems and a few bugs

admin/maps.php

@@ -37,19 +37,19 @@ function handleInput() {
 		for ($y = $minY; $y <= $maxY; $y ++) {
 			$str = array_shift($layout);
 			for ($x = $minX; $x <= $maxX; $x ++) {
-				$type = $str{0};
+				$type = $str[0];
 				$map->setSystemType($x, $y, $type);
 				if ($type != 'S') {
 					$str = substr($str, 1);
 					continue;
 				}
-				$alloc = (int) $str{1};
+				$alloc = (int) $str[1];
 				$map->setSystemAlloc($x, $y, $alloc);
 				if ($alloc == 0) {
 					$str = substr($str, 2);
 					continue;
 				}
-				$map->setSystemSpawn($x, $y, $str{2} == '1');
+				$map->setSystemSpawn($x, $y, $str[2] == '1');
 				$str = substr($str, 3);
 			}
 		}