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Code Modernization: Check the return type of wp_parse_url() in wp_mail().

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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 PHP 8.1, if the home URL does not have a "host" component, it would lead to a `substr(): Passing null to parameter #1 ($string) of type string is deprecated` notice.

Changing the logic around and adding validation for the return type value of `wp_parse_url()` prevents that.

Follow-up to [48601], [51606], [51622], [51626], [51629], [51630].

Props dennisatyoast, jrf.
See #54730.

git-svn-id: https://develop.svn.wordpress.org/trunk@52799 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Sergey Biryukov
2022-02-25 13:46:23 +00:00
parent 06b740f5f6
commit 391922e8b4
2 changed files with 31 additions and 5 deletions
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src/wp-includes/pluggable.php
+9 -5
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@@ -378,12 +378,16 @@ if ( ! function_exists( 'wp_mail' ) ) :
*/
if ( ! isset( $from_email ) ) {
// Get the site domain and get rid of www.
$sitename = wp_parse_url( network_home_url(), PHP_URL_HOST );
if ( 'www.' === substr( $sitename, 0, 4 ) ) {
$sitename = substr( $sitename, 4 );
}
$sitename = wp_parse_url( network_home_url(), PHP_URL_HOST );
$from_email = 'wordpress@';
$from_email = 'wordpress@' . $sitename;
if ( null !== $sitename ) {
if ( 'www.' === substr( $sitename, 0, 4 ) ) {
$sitename = substr( $sitename, 4 );
}
$from_email .= $sitename;
}
}
/**