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### 3.9.2. database_error

Give modules a chance to handle or process database errors. This can be useful to implement addional logging backends and/or alerting mechanisms. Another option is to fully override Phorum's default database error handling by handling the error and then calling exit() from the hook to prevent the default Phorum code from running.
Note: If you decide to use the full override scenario, then it is best to make your module run the database_error hook last, so other modules can still run their hook handling before the script exits. To accomplish this, add this to your module info:

    priority: run hook database_error after *

Call time:

At the start of the function `phorum_database_error` (which you can find in `common.php`). This function is called from the database layer when some database error occurs.

Hook input:

The error message that was returned from the database layer. This error is not HTML escaped, so if you send it to the browser, be sure to preprocess it using htmlspecialchars().

Hook output:

Same as input.

Example code:

    function phorum_mod_foo_database_error($error)
    {
        // Log database errors to syslog facility "LOCAL0".
        openlog("Phorum", LOG_PID | LOG_PERROR, LOG_LOCAL0);
        syslog(LOG_ERR, $error);

        return $error;
    }

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