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Ticket #50913: 50913-1.patch

File 50913-1.patch, 1.7 KB (added by jrf, 5 years ago)

Fix one fatal "argument must be passed by reference, value given" error. This single patch fixes 96 errors + 62 failures in the unit test run on PHP 8.0.

  • src/wp-includes/class-wp-comment-query.php 

    From 3e642327cc3916fc7d45b0931effb73adeaa7385 Mon Sep 17 00:00:00 2001
From: jrfnl <jrfnl@users.noreply.github.com>
Date: Tue, 11 Aug 2020 23:21:50 +0200
Subject: [PATCH] PHP 8.0: fix fatal "argument must be passed by reference,
 value given" [1]

The WP native `get_comment()` function expects the first argument `$comment` to be passed by reference.

The PHP `array_map()` function, however, passes by value, not by reference, resulting in a fatal `arguments must be passed by reference, value given` error.

The PHP native `array_walk()` function _does_ pass by reference. Using this prevents the fatal error on PHP 8 and maintains the existing behaviour on PHP < 8.

This patch fixes 96 errors + 62 failures + 3 warnings of the test failures on PHP 8.

Refs:
* https://developer.wordpress.org/reference/functions/get_comment/
* https://www.php.net/manual/en/function.array-map.php
* https://www.php.net/manual/en/function.array-walk.php
---
 src/wp-includes/class-wp-comment-query.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/wp-includes/class-wp-comment-query.php b/src/wp-includes/class-wp-comment-query.php
index bbc6fe2d66..e185ceb40e 100644
    a b class WP_Comment_Query { 
    481481                $_comments = apply_filters_ref_array( 'the_comments', array( $_comments, &$this ) );
    482482
    483483                // Convert to WP_Comment instances.
    484                 $comments = array_map( 'get_comment', $_comments );
     484                array_walk( $_comments, 'get_comment' );
     485                $comments = $_comments;
    485486
    486487                if ( $this->query_vars['hierarchical'] ) {
    487488                        $comments = $this->fill_descendants( $comments );