From 98799ea173690dd76b0d8bdbab3a04f1ede2f2ed Mon Sep 17 00:00:00 2001
From: nicolaasuni <info@tecnick.com>
Date: Sat, 22 Sep 2018 10:37:08 +0100
Subject: [PATCH] Simplify file_exists function

---
 CHANGELOG.TXT            |  5 ++++-
 composer.json            |  2 +-
 include/tcpdf_static.php | 18 +++---------------
 tcpdf.php                |  6 +++---
 4 files changed, 11 insertions(+), 20 deletions(-)

diff --git a/CHANGELOG.TXT b/CHANGELOG.TXT
index fc0bb41..5843efb 100644
--- a/CHANGELOG.TXT
+++ b/CHANGELOG.TXT
@@ -1,4 +1,7 @@
-6.2.20
+6.2.23
+	- Simplify file_exists function.
+
+6.2.22
 	- Fix for security vulnerability: Using the phar:// wrapper it was possible to trigger the unserialization of user provided data.
 
 6.2.19
diff --git a/composer.json b/composer.json
index df1e50d..bff3133 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
   "name": "tecnickcom/tcpdf",
-  "version": "6.2.22",
+  "version": "6.2.23",
   "homepage": "http://www.tcpdf.org/",
   "type": "library",
   "description": "TCPDF is a PHP class for generating PDF documents and barcodes.",
diff --git a/include/tcpdf_static.php b/include/tcpdf_static.php
index b010f7a..3e24597 100644
--- a/include/tcpdf_static.php
+++ b/include/tcpdf_static.php
@@ -55,7 +55,7 @@ class TCPDF_STATIC {
 	 * Current TCPDF version.
 	 * @private static
 	 */
-	private static $tcpdf_version = '6.2.22';
+	private static $tcpdf_version = '6.2.23';
 
 	/**
 	 * String alias for total number of pages.
@@ -1830,20 +1830,8 @@ class TCPDF_STATIC {
 	 * @public static
 	 */
 	public static function file_exists($filename) {
-		if (strpos($filename, '://') > 0) {
-			$wrappers = stream_get_wrappers();
-			foreach ($wrappers as $wrapper) {
-				if (($wrapper === 'http') || ($wrapper === 'https')) {
-					continue;
-				}
-				if (stripos($filename, $wrapper.'://') === 0) {
-					return false;
-				}
-			}
-		}
-		if (!@file_exists($filename)) {
-			// try to encode spaces on filename
-			$filename = str_replace(' ', '%20', $filename);
+		if (strpos($filename, '://') && (preg_match('|^https?://|', $filename) !== 1)) {
+			return false;
 		}
 		return @file_exists($filename);
 	}
diff --git a/tcpdf.php b/tcpdf.php
index b2c8ceb..998adfb 100644
--- a/tcpdf.php
+++ b/tcpdf.php
@@ -1,7 +1,7 @@
 <?php
 //============================================================+
 // File name   : tcpdf.php
-// Version     : 6.2.22
+// Version     : 6.2.23
 // Begin       : 2002-08-03
 // Last Update : 2018-09-14
 // Author      : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
@@ -104,7 +104,7 @@
  * Tools to encode your unicode fonts are on fonts/utils directory.</p>
  * @package com.tecnick.tcpdf
  * @author Nicola Asuni
- * @version 6.2.22
+ * @version 6.2.23
  */
 
 // TCPDF configuration
@@ -128,7 +128,7 @@ require_once(dirname(__FILE__).'/include/tcpdf_static.php');
  * TCPDF project (http://www.tcpdf.org) has been originally derived in 2002 from the Public Domain FPDF class by Olivier Plathey (http://www.fpdf.org), but now is almost entirely rewritten.<br>
  * @package com.tecnick.tcpdf
  * @brief PHP class for generating PDF documents without requiring external extensions.
- * @version 6.2.22
+ * @version 6.2.23
  * @author Nicola Asuni - info@tecnick.com
  * @IgnoreAnnotation("protected")
  * @IgnoreAnnotation("public")