deprecated warning in /wp-includes/kses.php

[rpayne7264]

one deprecated warning in /wp-includes/kses.php:

Backtrace from warning 'preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated' at /wp-includes/kses.php 1805:

This is the line of code causing the error: $content = preg_replace( '/[\x00-\x08\x0B\x0C\x0E-\x1F]/', '', $content );

This is the adjusted code to fix the issue: $content = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F]/', '', $content ?? '');

Update /wp-includes/kses.php to fix deprecated warnings:

-- Backtrace from warning 'preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated' at /wp-includes/kses.php 1805:

This was the line of code causing the error:
$content = preg_replace( '/[\x00-\x08\x0B\x0C\x0E-\x1F]/', , $content );

around line 1805, updated code to: $content = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F]/', '', $content ?? '');
The ?? operator ensures that if $content is null, it is replaced with an empty string () before being processed by preg_replace().

Trac ticket: https://core.trac.wordpress.org/ticket/63108

[sabernhardt]

#62785 already proposed silencing the deprecation notice in wp_kses_no_null().