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WPDB: Always use mysqli when available.

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This change makes WordPress use `mysqli` on PHP <5.5 when available, instead of only in PHP 5.5+ and development installs.

WPDB includes a fallback to `mysql` in the event that the database connection fails with `mysqli` so incompatibilities should be few and far between.

Fixes #42812 for trunk.

Built from https://develop.svn.wordpress.org/trunk@42388


git-svn-id: http://core.svn.wordpress.org/trunk@42217 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Dion Hulse 2017-12-12 05:43:48 +00:00
parent 6322887487
commit 04efa7e7ea
2 changed files with 4 additions and 11 deletions
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2
wp-includes/version.php
View File

@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '5.0-alpha-42387';
$wp_version = '5.0-alpha-42388';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

13
wp-includes/wp-db.php
View File

@ -593,19 +593,12 @@ class wpdb {
$this->show_errors();
}
/* Use ext/mysqli if it exists and:
* - WP_USE_EXT_MYSQL is defined as false, or
* - We are a development version of WordPress, or
* - We are running PHP 5.5 or greater, or
* - ext/mysql is not loaded.
*/
// Use ext/mysqli if it exists unless WP_USE_EXT_MYSQL is defined as true
if ( function_exists( 'mysqli_connect' ) ) {
$this->use_mysqli = true;
if ( defined( 'WP_USE_EXT_MYSQL' ) ) {
$this->use_mysqli = ! WP_USE_EXT_MYSQL;
} elseif ( version_compare( phpversion(), '5.5', '>=' ) || ! function_exists( 'mysql_connect' ) ) {
$this->use_mysqli = true;
} elseif ( false !== strpos( $GLOBALS['wp_version'], '-' ) ) {
$this->use_mysqli = true;
}
}