From 50bb83dbf2e1f5eba42ffd8f7c2ccfb990b1610a Mon Sep 17 00:00:00 2001
From: David Grudl <david@grudl.com>
Date: Tue, 20 Oct 2020 21:04:33 +0200
Subject: [PATCH] Fix compatibility with PHP 8

---
 adminer/include/bootstrap.inc.php |  4 ++--
 adminer/include/functions.inc.php |  2 +-
 adminer/include/pdo.inc.php       | 14 +++++++-------
 changes.txt                       |  1 +
 compile.php                       | 12 ++++++++++--
 5 files changed, 21 insertions(+), 12 deletions(-)

diff --git a/adminer/include/bootstrap.inc.php b/adminer/include/bootstrap.inc.php
index 6a56945d..04fb5cdd 100644
--- a/adminer/include/bootstrap.inc.php
+++ b/adminer/include/bootstrap.inc.php
@@ -1,5 +1,5 @@
 <?php
-error_reporting(6135); // errors and warnings
+error_reporting(6133); // errors
 
 include "../adminer/include/coverage.inc.php";
 
@@ -60,7 +60,7 @@ if (!defined("SID")) {
 
 // disable magic quotes to be able to use database escaping function
 remove_slashes(array(&$_GET, &$_POST, &$_COOKIE), $filter);
-if (get_magic_quotes_runtime()) {
+if (function_exists("get_magic_quotes_runtime") && get_magic_quotes_runtime()) {
 	set_magic_quotes_runtime(false);
 }
 @set_time_limit(0); // @ - can be disabled
diff --git a/adminer/include/functions.inc.php b/adminer/include/functions.inc.php
index ea9d81b3..9be33b0d 100644
--- a/adminer/include/functions.inc.php
+++ b/adminer/include/functions.inc.php
@@ -62,7 +62,7 @@ function number_type() {
 * @return null modified in place
 */
 function remove_slashes($process, $filter = false) {
-	if (get_magic_quotes_gpc()) {
+	if (function_exists("get_magic_quotes_gpc") && get_magic_quotes_gpc()) {
 		while (list($key, $val) = each($process)) {
 			foreach ($val as $k => $v) {
 				unset($process[$key][$k]);
diff --git a/adminer/include/pdo.inc.php b/adminer/include/pdo.inc.php
index 14fb91ce..4d710e27 100644
--- a/adminer/include/pdo.inc.php
+++ b/adminer/include/pdo.inc.php
@@ -1,8 +1,8 @@
 <?php
 // PDO can be used in several database drivers
 if (extension_loaded('pdo')) {
-	/*abstract*/ class Min_PDO extends PDO {
-		var $_result, $server_info, $affected_rows, $errno, $error;
+	/*abstract*/ class Min_PDO {
+		var $_result, $server_info, $affected_rows, $errno, $error, $pdo;
 		
 		function __construct() {
 			global $adminer;
@@ -14,21 +14,21 @@ if (extension_loaded('pdo')) {
 		
 		function dsn($dsn, $username, $password, $options = array()) {
 			try {
-				parent::__construct($dsn, $username, $password, $options);
+				$this->pdo = new PDO($dsn, $username, $password, $options);
 			} catch (Exception $ex) {
 				auth_error(h($ex->getMessage()));
 			}
-			$this->setAttribute(13, array('Min_PDOStatement')); // 13 - PDO::ATTR_STATEMENT_CLASS
-			$this->server_info = @$this->getAttribute(4); // 4 - PDO::ATTR_SERVER_VERSION
+			$this->pdo->setAttribute(13, array('Min_PDOStatement')); // 13 - PDO::ATTR_STATEMENT_CLASS
+			$this->server_info = @$this->pdo->getAttribute(4); // 4 - PDO::ATTR_SERVER_VERSION
 		}
 		
 		/*abstract function select_db($database);*/
 		
 		function query($query, $unbuffered = false) {
-			$result = parent::query($query);
+			$result = $this->pdo->query($query);
 			$this->error = "";
 			if (!$result) {
-				list(, $this->errno, $this->error) = $this->errorInfo();
+				list(, $this->errno, $this->error) = $this->pdo->errorInfo();
 				if (!$this->error) {
 					$this->error = lang('Unknown error.');
 				}
diff --git a/changes.txt b/changes.txt
index 14f4cb98..11ddd26a 100644
--- a/changes.txt
+++ b/changes.txt
@@ -1,4 +1,5 @@
 Adminer 4.7.8-dev:
+Support PHP 8
 
 Adminer 4.7.7 (released 2020-05-11):
 Fix open redirect if Adminer is accessible at //adminer.php%2F@
diff --git a/compile.php b/compile.php
index 229ba151..3bb1b6ac 100755
--- a/compile.php
+++ b/compile.php
@@ -1,6 +1,6 @@
 #!/usr/bin/env php
 <?php
-error_reporting(6135); // errors and warnings
+error_reporting(6133); // errors
 include dirname(__FILE__) . "/adminer/include/version.inc.php";
 include dirname(__FILE__) . "/externals/JsShrink/jsShrink.php";
 
@@ -233,7 +233,7 @@ function php_shrink($input) {
 		$short_variables[$key] = short_identifier($number, $chars); // could use also numbers and \x7f-\xff
 	}
 	
-	$set = array_flip(preg_split('//', '!"#$%&\'()*+,-./:;<=>?@[\]^`{|}'));
+	$set = array_flip(preg_split('//', '!"#$%&\'()*+,-./:;<=>?@[]^`{|}'));
 	$space = '';
 	$output = '';
 	$in_echo = false;
@@ -315,6 +315,14 @@ function compile_file($match) {
 	return '"' . add_quo_slashes($file) . '"';
 }
 
+if (!function_exists("each")) {
+	function each(&$arr) {
+		$key = key($arr);
+		next($arr);
+		return $key === null ? false : array($key, $arr[$key]);
+	}
+}
+
 function min_version() {
 	return true;
 }