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Database: Remove support for the mysql extension.

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The `mysql` extension is no longer used in PHP 7 or above. There's a good amount of conditional code in `wpdb` and the health checks that can be removed now that only the `mysqli` functions are used.

Fixes #59118


git-svn-id: https://develop.svn.wordpress.org/trunk@56475 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
John Blackbourn
2023-08-26 13:01:05 +00:00
parent 7ed2467c3a
commit f71140438b
7 changed files with 109 additions and 292 deletions
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16
src/wp-admin/includes/class-wp-debug-data.php
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@@ -855,10 +855,7 @@ class WP_Debug_Data {
);
// Populate the database debug fields.
if ( is_resource( $wpdb->dbh ) ) {
// Old mysql extension.
$extension = 'mysql';
} elseif ( is_object( $wpdb->dbh ) ) {
if ( is_object( $wpdb->dbh ) ) {
// mysqli or PDO.
$extension = get_class( $wpdb->dbh );
} else {
@@ -868,16 +865,7 @@ class WP_Debug_Data {
$server = $wpdb->get_var( 'SELECT VERSION()' );
if ( isset( $wpdb->use_mysqli ) && $wpdb->use_mysqli ) {
$client_version = $wpdb->dbh->client_info;
} else {
// phpcs:ignore WordPress.DB.RestrictedFunctions.mysql_mysql_get_client_info,PHPCompatibility.Extensions.RemovedExtensions.mysql_DeprecatedRemoved
if ( preg_match( '|[0-9]{1,2}\.[0-9]{1,2}\.[0-9]{1,2}|', mysql_get_client_info(), $matches ) ) {
$client_version = $matches[0];
} else {
$client_version = null;
}
}
$client_version = $wpdb->dbh->client_info;
$info['wp-database']['fields']['extension'] = array(
'label' => __( 'Extension' ),