1 files changed, 114 insertions, 0 deletions
diff --git a/srcs/phpmyadmin/libraries/db_table_exists.inc.php b/srcs/phpmyadmin/libraries/db_table_exists.inc.php
new file mode 100644
index 0000000..4e6e369
--- /dev/null
+++ b/srcs/phpmyadmin/libraries/db_table_exists.inc.php
@@ -0,0 +1,114 @@
+<?php
+/* vim: set expandtab sw=4 ts=4 sts=4: */
+/**
+ * Ensure the database and the table exist (else move to the "parent" script)
+ * and display headers
+ *
+ * @package PhpMyAdmin
+ */
+declare(strict_types=1);
+
+use PhpMyAdmin\Core;
+use PhpMyAdmin\Message;
+use PhpMyAdmin\Response;
+use PhpMyAdmin\Url;
+
+if (! defined('PHPMYADMIN')) {
+    exit;
+}
+
+global $db, $table;
+
+if (empty($is_db)) {
+    if (strlen($db) > 0) {
+        $is_db = @$GLOBALS['dbi']->selectDb($db);
+    } else {
+        $is_db = false;
+    }
+
+    if (! $is_db) {
+        // not a valid db name -> back to the welcome page
+        if (! defined('IS_TRANSFORMATION_WRAPPER')) {
+            $response = Response::getInstance();
+            if ($response->isAjax()) {
+                $response->setRequestStatus(false);
+                $response->addJSON(
+                    'message',
+                    Message::error(__('No databases selected.'))
+                );
+            } else {
+                $url_params = ['reload' => 1];
+                if (isset($message)) {
+                    $url_params['message'] = $message;
+                }
+                if (! empty($sql_query)) {
+                    $url_params['sql_query'] = $sql_query;
+                }
+                if (isset($show_as_php)) {
+                    $url_params['show_as_php'] = $show_as_php;
+                }
+                Core::sendHeaderLocation(
+                    './index.php'
+                    . Url::getCommonRaw($url_params)
+                );
+            }
+            exit;
+        }
+    }
+} // end if (ensures db exists)
+
+if (empty($is_table)
+    && ! defined('PMA_SUBMIT_MULT')
+    && ! defined('TABLE_MAY_BE_ABSENT')
+) {
+    // Not a valid table name -> back to the db_sql.php
+
+    if (strlen($table) > 0) {
+        $is_table = $GLOBALS['dbi']->getCachedTableContent([$db, $table], false);
+
+        if (! $is_table) {
+            $_result = $GLOBALS['dbi']->tryQuery(
+                'SHOW TABLES LIKE \''
+                . $GLOBALS['dbi']->escapeString($table) . '\';',
+                PhpMyAdmin\DatabaseInterface::CONNECT_USER,
+                PhpMyAdmin\DatabaseInterface::QUERY_STORE
+            );
+            $is_table = @$GLOBALS['dbi']->numRows($_result);
+            $GLOBALS['dbi']->freeResult($_result);
+        }
+    } else {
+        $is_table = false;
+    }
+
+    if (! $is_table) {
+        if (! defined('IS_TRANSFORMATION_WRAPPER')) {
+            if (strlen($table) > 0) {
+                // SHOW TABLES doesn't show temporary tables, so try select
+                // (as it can happen just in case temporary table, it should be
+                // fast):
+
+                /**
+                 * @todo should this check really
+                 * only happen if IS_TRANSFORMATION_WRAPPER?
+                 */
+                $_result = $GLOBALS['dbi']->tryQuery(
+                    'SELECT COUNT(*) FROM ' . PhpMyAdmin\Util::backquote($table)
+                    . ';',
+                    PhpMyAdmin\DatabaseInterface::CONNECT_USER,
+                    PhpMyAdmin\DatabaseInterface::QUERY_STORE
+                );
+                $is_table = ($_result && @$GLOBALS['dbi']->numRows($_result));
+                $GLOBALS['dbi']->freeResult($_result);
+            }
+
+            if (! $is_table) {
+                include ROOT_PATH . 'db_sql.php';
+                exit;
+            }
+        }
+
+        if (! $is_table) {
+            exit;
+        }
+    }
+} // end if (ensures table exists)