# maxdb_debug

(PECL maxdb >= 1.0)

maxdb_debug — Performs debugging operations

### 说明

maxdb_debug ( string `$debug` ) : void

The maxdb_debug() can be used to trace the SQLDBC communication. The following strings can be used as a parameter to maxdb_debug():

- TRACE SHORT ON|OFF - Enables/disables method call trace.
- TRACE LONG ON|OFF - Enables/disables method argument and detail debug trace.
- TRACE PACKET ON|OFF|<size> - Enables/disables packet trace, limiting the size of the traced object to the specified number of bytes, or 1000 if no size is specified.
- TRACE SQL ON|OFF - Enables/disables high level api trace.
- TRACE TIMESTAMP ON|OFF - Enables/disables a timestamp prefix on each line that is traced.
- TRACE SIZE <size> - Limits the size of the trace file to <size> bytes, at least 8192 bytes are required.

### 返回值

maxdb_debug() doesn't return any value.

### 范例

Example #1 过程化风格

    <?php

    maxdb_debug("trace packet 200");

    $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

    /* check connection */
    if (!$link) {
       printf("Connect failed: %s\n", maxdb_connect_error());
       exit();
    }

    /* close connection */
    maxdb_close($link);
    ?>

The above example produces no output.