[NFC] - Compatibility for PHP-7.4/PHP-8

There are a few more leftovers under vendor and packages: `find . -name "*.php" -exec php -l {} \; | grep -v "No"`. Not sure how to deal with that.

diff --git a/Civi/Core/Event/EventPrinter.php b/Civi/Core/Event/EventPrinter.php
index 0c2cfb6235399733449db356c692b6304231120d..74091efd1da5e2265066c4ac014870c7eb318085 100644 (file)
--- a/Civi/Core/Event/EventPrinter.php
+++ b/Civi/Core/Event/EventPrinter.php
@@ -18,7 +18,7 @@ class EventPrinter {
    */
   public static function formatName($callback): string {
     $normalizeNamespace = function($symbol) {
-      return $symbol{0} === '\\' ? substr($symbol, 1) : $symbol;
+      return $symbol[0] === '\\' ? substr($symbol, 1) : $symbol;
     };
     if (is_array($callback)) {
       [$a, $b] = $callback;