Description
In case of failure, most of the DB functions return a DB_Error object which contains information about the error. DB_Error offers the same functions as PEAR_Error.
The text messages returned by DB_Error::getMessage() are consistent between each DBMS.
The error code integers returned by DB_Error::getCode() are also consistent between each DBMS. The integers returned are based on the DB_ERROR_* constants defined in DB.php.
DB_Error::getDebugInfo() and DB_Error::getUserInfo() return complete native DBMS error reports.
Example 21-1. Trapping errors and determining what happened <?php require_once 'DB.php'; $db =& DB::connect('pgsql://wronguser:badpw@localhost/thedb'); if (DB::isError($db)) { /* * This is not what you would really want to do in * your program. It merely demonstrates what kinds * of data you can get back from error objects. */ echo 'Standard Message: ' . $db->getMessage() . "\n"; echo 'Standard Code: ' . $db->getCode() . "\n"; echo 'DBMS/User Message: ' . $db->getUserInfo() . "\n"; echo 'DBMS/Debug Message: ' . $db->getDebugInfo() . "\n"; exit; } ?> |
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