From b5e0ca406fb04e123b0e166792ea7a2242f9577d Mon Sep 17 00:00:00 2001
From: Freddie Leeman <freddie@freddieleeman.nl>
Date: Thu, 4 Apr 2019 13:43:49 +0200
Subject: [PATCH] URI in PDF can result in E_NOTICE

Generating a PDF file with a hyperlink like "tel:12345" results in an error: "Errstr: Undefined index: path" due to the fact that parse_url should only be used for URL not URI.

SOURCE: https://www.php.net/manual/en/function.parse-url.php
"This function is intended specifically for the purpose of parsing URLs and not URIs."

This fix does not prevent parsing the link but checks if the parsed result contains a 'path'. If it does not than the rest of the if statement is ignored and no error is generated.
---
 tcpdf.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tcpdf.php b/tcpdf.php
index a1b4c1c..8a992f9 100644
--- a/tcpdf.php
+++ b/tcpdf.php
@@ -8380,7 +8380,7 @@ class TCPDF {
 									$annots .= ' /A << /S /JavaScript /JS '.$this->_textstring($jsa, $annot_obj_id).'>>';
 								} else {
 									$parsedUrl = parse_url($pl['txt']);
-									if (empty($parsedUrl['scheme']) AND (strtolower(substr($parsedUrl['path'], -4)) == '.pdf')) {
+									if (empty($parsedUrl['scheme']) AND (!empty($parsedUrl['path']) && strtolower(substr($parsedUrl['path'], -4)) == '.pdf')) {
 										// relative link to a PDF file
 										$dest = '[0 /Fit]'; // default page 0
 										if (!empty($parsedUrl['fragment'])) {