fix silenced opcache loadable error

Author: mvorisek

run-tests.php

@@ -881,17 +881,21 @@ function write_information(): void
     // load list of enabled and loadable extensions
     save_text($info_file, <<<'PHP'
         <?php
-        echo str_replace("Zend OPcache", "opcache", implode(",", get_loaded_extensions()));
-        $ext_dir = ini_get("extension_dir");
+        $exts = [];
+        foreach (get_loaded_extensions() as $ext) {
+            $exts[] = ['Zend OPcache' => 'opcache'][$ext] ?? $ext;
+        }
+        $ext_dir = ini_get('extension_dir);
         foreach (scandir($ext_dir) as $file) {
             if (!preg_match('/^(?:php_)?([_a-zA-Z0-9]+)\.(?:so|dll)$/', $file, $matches)) {
                 continue;
             }
             $ext = $matches[1];
-            if (!extension_loaded($ext) && @dl($file)) {
-                echo ",", $ext;
+            if (!in_array($ext, $exts) && !extension_loaded($ext) && @dl($file)) {
+                exts[] = $ext;
             }
         }
+        echo implode(',', $exts);
         ?>
     PHP);
     $exts_to_test = explode(',', `$php $pass_options $info_params $no_file_cache "$info_file"`);