From 734960733e91cac19078709c5aca3c59028446b4 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov.ru@gmail.com>
Date: Fri, 11 Feb 2022 15:50:05 +0000
Subject: [PATCH] Code Modernization: Use `file_get_contents()` in
 `wp_get_image_mime()`.

`file_get_contents()` is faster than `fread()`, because the PHP core can decide how to best read the remaining file; it could decide to issue just one `read()` call or `mmap()` the file first.

Per the PHP manual, `file_get_contents()` or `stream_get_contents()` is the preferred way to read the contents of a file into a string. It will use memory mapping techniques if supported by the OS to enhance performance.

Reference: [https://www.php.net/manual/en/function.file-get-contents.php PHP Manual: file_get_contents()].

Follow-up to [50810], [52696], [52698].

Props maxkellermann.
See #55069.
Built from https://develop.svn.wordpress.org/trunk@52701


git-svn-id: http://core.svn.wordpress.org/trunk@52290 1a063a9b-81f0-0310-95a4-ce76da25c4cd
---
 wp-includes/functions.php | 8 +-------
 wp-includes/version.php   | 2 +-
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 24cfbb7b33..18ce7c2fec 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -3265,12 +3265,8 @@ function wp_get_image_mime( $file ) {
 			return $mime;
 		}
 
-		$handle = fopen( $file, 'rb' );
-		if ( false === $handle ) {
-			return false;
-		}
+		$magic = file_get_contents( $file, false, null, 0, 12 );
 
-		$magic = fread( $handle, 12 );
 		if ( false === $magic ) {
 			return false;
 		}
@@ -3289,8 +3285,6 @@ function wp_get_image_mime( $file ) {
 		) {
 			$mime = 'image/webp';
 		}
-
-		fclose( $handle );
 	} catch ( Exception $e ) {
 		$mime = false;
 	}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index edcadd7361..10a057c5a0 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.0-alpha-52700';
+$wp_version = '6.0-alpha-52701';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.