From bdccfa3a0347801d8e1ca827122f2a1f81095eb9 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov.ru@gmail.com>
Date: Wed, 30 Sep 2020 12:20:03 +0000
Subject: [PATCH] Code Modernization: Check if the file to retrieve metadata
 from in `get_file_data()` was successfully opened.

This avoids a fatal error on PHP 8 caused by passing a `false` value to `fread()`, instead of a file resource.

See #50913.
Built from https://develop.svn.wordpress.org/trunk@49073


git-svn-id: http://core.svn.wordpress.org/trunk@48835 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/functions.php | 12 ++++++++----
 wp-includes/version.php   |  2 +-
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 68d865089f..fe68d7f760 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -6040,11 +6040,15 @@ function get_file_data( $file, $default_headers, $context = '' ) {
 	// We don't need to write to the file, so just open for reading.
 	$fp = fopen( $file, 'r' );
 
-	// Pull only the first 8 KB of the file in.
-	$file_data = fread( $fp, 8 * KB_IN_BYTES );
+	if ( $fp ) {
+		// Pull only the first 8 KB of the file in.
+		$file_data = fread( $fp, 8 * KB_IN_BYTES );
 
-	// PHP will close file handle, but we are good citizens.
-	fclose( $fp );
+		// PHP will close file handle, but we are good citizens.
+		fclose( $fp );
+	} else {
+		$file_data = '';
+	}
 
 	// Make sure we catch CR-only line endings.
 	$file_data = str_replace( "\r", "\n", $file_data );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index ff7dfb6f77..8a841a477e 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6-alpha-49072';
+$wp_version = '5.6-alpha-49073';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.