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<?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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} |
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italy
is not defined by the methodfinale(...)
.The most likely cause is that the parameter was removed, but the annotation was not.