Restore the get_allowed_font_mime_types function

src/wp-includes/fonts/class-wp-font-utils.php

@@ -211,4 +211,24 @@ private static function apply_sanitizer( $value, $sanitizer ) {
 		}
 		return call_user_func( $sanitizer, $value );
 	}
+
+	/**
+	 * Provide the expected mime-type value for font files per-PHP release. Due to differences in the values returned these values differ between PHP versions.
+	 *
+	 * This is necessary until a collection of valid mime-types per-file extension can be provided to 'upload_mimes' filter.
+	 *
+	 * @since 6.5.0
+	 *
+	 * @return Array A collection of mime types keyed by file extension.
+	 */
+	public static function get_allowed_font_mime_types() {
+		$php_7_ttf_mime_type = PHP_VERSION_ID >= 70300 ? 'application/font-sfnt' : 'application/x-font-ttf';
+
+		return array(
+			'otf'   => 'application/vnd.ms-opentype',
+			'ttf'   => PHP_VERSION_ID >= 70400 ? 'font/sfnt' : $php_7_ttf_mime_type,
+			'woff'  => PHP_VERSION_ID >= 80100 ? 'font/woff' : 'application/font-woff',
+			'woff2' => PHP_VERSION_ID >= 80100 ? 'font/woff2' : 'application/font-woff2',
+		);
+	}
 }

tests/phpunit/tests/fonts/font-library/fontLibraryHooks.php

@@ -69,29 +69,18 @@ protected function create_font_face_with_file( $filename ) {
 		return array( $font_face_id, $font_path );
 	}
 
-	public function get_expected_font_mime_types() {
-		$php_7_ttf_mime_type = PHP_VERSION_ID >= 70300 ? 'application/font-sfnt' : 'application/x-font-ttf';
-
-		return array(
-			'otf'   => 'application/vnd.ms-opentype',
-			'ttf'   => PHP_VERSION_ID >= 70400 ? 'font/sfnt' : $php_7_ttf_mime_type,
-			'woff'  => PHP_VERSION_ID >= 80100 ? 'font/woff' : 'application/font-woff',
-			'woff2' => PHP_VERSION_ID >= 80100 ? 'font/woff2' : 'application/font-woff2',
-		);
-	}
-
 	protected function upload_font_file( $font_filename ) {
 		$font_file_path = DIR_TESTDATA . '/fonts/' . $font_filename;
 
-		add_filter( 'upload_mimes', array( $this, 'get_expected_font_mime_types' ) );
+		add_filter( 'upload_mimes', array( 'WP_Font_Utils', 'get_allowed_font_mime_types' ) );
 		add_filter( 'upload_dir', 'wp_get_font_dir' );
 		$font_file = wp_upload_bits(
 			$font_filename,
 			null,
 			file_get_contents( $font_file_path )
 		);
 		remove_filter( 'upload_dir', 'wp_get_font_dir' );
-		remove_filter( 'upload_mimes', array( $this, 'get_expected_font_mime_types' ) );
+		remove_filter( 'upload_mimes', array( 'WP_Font_Utils', 'get_allowed_font_mime_types' ) );
 
 		return $font_file;
 	}