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Code Modernization: Correct the check for negative post IDs in WP_Query::parse_query() to work as expected on PHP 8.

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PHP 8 changes the way string to number comparisons are performed: https://wiki.php.net/rfc/string_to_number_comparison

In particular, checking if an empty string is less than zero in PHP 8 evaluates to `true`, not `false`.

For `WP_Query`, this resulted in unintentionally returning a 404 error for most of front-end requests, instead of the relevant content.

By explicitly casting the value to `int`, we make sure to compare both values as numbers, rather than a string and a number.

Follow-up to [38288].

Props trepmal.
See #50913.
Built from https://develop.svn.wordpress.org/trunk@48960


git-svn-id: http://core.svn.wordpress.org/trunk@48722 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Sergey Biryukov 2020-09-09 02:35:06 +00:00
parent 17a4c20d55
commit 7c60a660f1
2 changed files with 2 additions and 2 deletions
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2
wp-includes/class-wp-query.php
View File

@ -759,7 +759,7 @@ class WP_Query {
$this->is_favicon = true;
}
if ( ! is_scalar( $qv['p'] ) || $qv['p'] < 0 ) {
if ( ! is_scalar( $qv['p'] ) || (int) $qv['p'] < 0 ) {
$qv['p'] = 0;
$qv['error'] = '404';
} else {

2
wp-includes/version.php
View File

@ -13,7 +13,7 @@
*
* @global string $wp_version
*/
$wp_version = '5.6-alpha-48958';
$wp_version = '5.6-alpha-48960';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.