139 lines
3.8 KiB
PHP
Executable File
139 lines
3.8 KiB
PHP
Executable File
<?php
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/**
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* Pick the right DB class and return an instance
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*
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* @since 1.7
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* @param string $extension Optional: user defined choice
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* @return class $ydb DB class instance
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*/
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function yourls_set_DB_driver( ) {
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// Auto-pick the driver. Priority: user defined, then PDO, then mysqli, then mysql
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if ( defined( 'YOURLS_DB_DRIVER' ) ) {
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$driver = strtolower( YOURLS_DB_DRIVER ); // accept 'MySQL', 'mySQL', etc
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} elseif ( extension_loaded( 'pdo_mysql' ) ) {
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$driver = 'pdo';
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} elseif ( extension_loaded( 'mysqli' ) ) {
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$driver = 'mysqli';
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} elseif ( extension_loaded( 'mysql' ) ) {
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$driver = 'mysql';
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} else {
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$driver = '';
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}
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// Set the new driver
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if ( in_array( $driver, array( 'mysql', 'mysqli', 'pdo' ) ) ) {
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$class = yourls_require_db_files( $driver );
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}
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global $ydb;
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if ( !class_exists( $class, false ) ) {
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$ydb = new stdClass();
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yourls_die(
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yourls__( 'YOURLS requires the mysql, mysqli or pdo_mysql PHP extension. No extension found. Check your server config, or contact your host.' ),
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yourls__( 'Fatal error' ),
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503
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);
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}
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yourls_do_action( 'set_DB_driver', $driver );
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$ydb = new $class( YOURLS_DB_USER, YOURLS_DB_PASS, YOURLS_DB_NAME, YOURLS_DB_HOST );
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$ydb->DB_driver = $driver;
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yourls_debug_log( "DB driver: $driver" );
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}
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/**
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* Load required DB class files
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*
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* This goes in its own function to allow easier unit tests
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*
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* @since 1.7.1
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* @param string $driver DB driver
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* @return string name of the DB class to instantiate
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*/
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function yourls_require_db_files( $driver ) {
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require_once( YOURLS_INC . '/ezSQL/ez_sql_core.php' );
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require_once( YOURLS_INC . '/ezSQL/ez_sql_core_yourls.php' );
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require_once( YOURLS_INC . '/ezSQL/ez_sql_' . $driver . '.php' );
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require_once( YOURLS_INC . '/ezSQL/ez_sql_' . $driver . '_yourls.php' );
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return 'ezSQL_' . $driver . '_yourls';
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}
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/**
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* Connect to DB
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*
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* @since 1.0
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*/
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function yourls_db_connect() {
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global $ydb;
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if ( !defined( 'YOURLS_DB_USER' )
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or !defined( 'YOURLS_DB_PASS' )
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or !defined( 'YOURLS_DB_NAME' )
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or !defined( 'YOURLS_DB_HOST' )
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) yourls_die ( yourls__( 'Incorrect DB config, or could not connect to DB' ), yourls__( 'Fatal error' ), 503 );
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// Are we standalone or in the WordPress environment?
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if ( class_exists( 'wpdb', false ) ) {
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/* TODO: should we deprecate this? Follow WP dev in that area */
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$ydb = new wpdb( YOURLS_DB_USER, YOURLS_DB_PASS, YOURLS_DB_NAME, YOURLS_DB_HOST );
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} else {
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yourls_set_DB_driver();
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}
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return $ydb;
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}
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/**
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* Return true if DB server is responding
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*
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* This function is supposed to be called right after yourls_get_all_options() has fired. It is not designed (yet) to
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* check for a responding server after several successful operation to check if the server has gone MIA
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*
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* @since 1.7.1
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*/
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function yourls_is_db_alive() {
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global $ydb;
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$alive = false;
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switch( $ydb->DB_driver ) {
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case 'pdo' :
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$alive = isset( $ydb->dbh );
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break;
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case 'mysql' :
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$alive = ( isset( $ydb->dbh ) && false !== $ydb->dbh );
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break;
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case 'mysqli' :
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$alive = ( null == mysqli_connect_error() );
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break;
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// Custom DB driver & class : delegate check
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default:
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$alive = yourls_apply_filter( 'is_db_alive_custom', false );
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}
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return $alive;
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}
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/**
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* Die with a DB error message
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*
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* @TODO in version 1.8 : use a new localized string, specific to the problem (ie: "DB is dead")
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*
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* @since 1.7.1
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*/
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function yourls_db_dead() {
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// Use any /user/db_error.php file
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if( file_exists( YOURLS_USERDIR . '/db_error.php' ) ) {
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include_once( YOURLS_USERDIR . '/db_error.php' );
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die();
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}
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yourls_die( yourls__( 'Incorrect DB config, or could not connect to DB' ), yourls__( 'Fatal error' ), 503 );
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} |