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wordpress/wp-includes
Sergey Biryukov 446d463a19 Code Modernization: Check the return type of parse_url() in url_to_postid().
As per the PHP manual:
> If the `component` parameter is omitted, an associative array is returned.
> If the `component` parameter is specified, `parse_url()` returns a string (or an int, in the case of `PHP_URL_PORT`) instead of an array. If the requested component doesn't exist within the given URL, `null` will be returned.

Reference: [https://www.php.net/manual/en/function.parse-url.php#refsect1-function.parse-url-returnvalues PHP Manual: parse_url(): Return Values]

In this case, `parse_url()` is called with `PHP_URL_HOST` as `$component`, which returns `null` if the URL only has a path. The return value of `parse_url()` was then passed to `str_replace()`, leading to a notice on PHP 8.1:
{{{
str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated
}}}

Adding validation for the return type value of `parse_url()` prevents that.

This commit addresses a few errors in the test suite along the lines of:
{{{
5) Tests_Rewrite::test_url_to_postid_home_has_path
str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated

/var/www/src/wp-includes/rewrite.php:503
/var/www/tests/phpunit/tests/rewrite.php:271
/var/www/vendor/bin/phpunit:123
}}}

Includes adding a dedicated unit test for a URL that only has a path.

Follow-up to [41786], [51606], [51622], [51626], [51629], [51630], [52799].

Props jrf, aristath, poena, justinahinon, SergeyBiryukov.
See #55656.
Built from https://develop.svn.wordpress.org/trunk@54364


git-svn-id: http://core.svn.wordpress.org/trunk@53923 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2022-10-01 03:25:10 +00:00
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