wp_check_php_mysql_versions()

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This function’s access is marked private. This means it is not intended for use by plugin or theme developers, only in other core functions. It is listed here for completeness.

Checks for the required PHP version, and the mysqli extension or a database drop-in.

Description

Dies if requirements are not met.

Source

function wp_check_php_mysql_versions() {
	global $required_php_version, $wp_version;

	$php_version = PHP_VERSION;

	if ( version_compare( $required_php_version, $php_version, '>' ) ) {
		$protocol = wp_get_server_protocol();
		header( sprintf( '%s 500 Internal Server Error', $protocol ), true, 500 );
		header( 'Content-Type: text/html; charset=utf-8' );
		printf(
			'Your server is running PHP version %1$s but WordPress %2$s requires at least %3$s.',
			$php_version,
			$wp_version,
			$required_php_version
		);
		exit( 1 );
	}

	// This runs before default constants are defined, so we can't assume WP_CONTENT_DIR is set yet.
	$wp_content_dir = defined( 'WP_CONTENT_DIR' ) ? WP_CONTENT_DIR : ABSPATH . 'wp-content';

	if ( ! function_exists( 'mysqli_connect' )
		&& ! file_exists( $wp_content_dir . '/db.php' )
	) {
		require_once ABSPATH . WPINC . '/functions.php';
		wp_load_translations_early();

		$message = '<p>' . __( 'Your PHP installation appears to be missing the MySQL extension which is required by WordPress.' ) . "</p>\n";

		$message .= '<p>' . sprintf(
			/* translators: %s: mysqli. */
			__( 'Please check that the %s PHP extension is installed and enabled.' ),
			'<code>mysqli</code>'
		) . "</p>\n";

		$message .= '<p>' . sprintf(
			/* translators: %s: Support forums URL. */
			__( 'If you are unsure what these terms mean you should probably contact your host. If you still need help you can always visit the <a href="%s">WordPress support forums</a>.' ),
			__( 'https://wordpress.org/support/forums/' )
		) . "</p>\n";

		$args = array(
			'exit' => false,
			'code' => 'mysql_not_found',
		);
		wp_die(
			$message,
			__( 'Requirements Not Met' ),
			$args
		);
		exit( 1 );
	}
}

Changelog

VersionDescription
3.0.0Introduced.

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