--- a/wp/wp-admin/load-styles.php	Fri Sep 05 18:40:08 2025 +0200
+++ b/wp/wp-admin/load-styles.php	Fri Sep 05 18:52:52 2025 +0200
@@ -1,11 +1,18 @@
 <?php
 
 /*
- * Disable error reporting.
- *
- * Set this to error_reporting( -1 ) for debugging.
+ * The error_reporting() function can be disabled in php.ini. On systems where that is the case,
+ * it's best to add a dummy function to the wp-config.php file, but as this call to the function
+ * is run prior to wp-config.php loading, it is wrapped in a function_exists() check.
  */
-error_reporting( 0 );
+if ( function_exists( 'error_reporting' ) ) {
+	/*
+	 * Disable error reporting.
+	 *
+	 * Set this to error_reporting( -1 ) for debugging.
+	 */
+	error_reporting( 0 );
+}
 
 // Set ABSPATH for execution.
 if ( ! defined( 'ABSPATH' ) ) {
@@ -48,24 +55,7 @@
 $wp_styles = new WP_Styles();
 wp_default_styles( $wp_styles );
 
-$etag = "WP:{$wp_version};";
-
-foreach ( $load as $handle ) {
-	if ( ! array_key_exists( $handle, $wp_styles->registered ) ) {
-		continue;
-	}
-
-	$ver   = $wp_styles->registered[ $handle ]->ver ? $wp_styles->registered[ $handle ]->ver : $wp_version;
-	$etag .= "{$handle}:{$ver};";
-}
-
-/*
- * This is not intended to be cryptographically secure, just a fast way to get
- * a fixed length string based on the script versions. As this file does not
- * load the full WordPress environment, it is not possible to use the salted
- * wp_hash() function.
- */
-$etag = 'W/"' . md5( $etag ) . '"';
+$etag = $wp_styles->get_etag( $load );
 
 if ( isset( $_SERVER['HTTP_IF_NONE_MATCH'] ) && stripslashes( $_SERVER['HTTP_IF_NONE_MATCH'] ) === $etag ) {
 	header( "$protocol 304 Not Modified" );