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# mysqli_debug

(PHP 5)

mysqli_debug -- Performs debugging operations

## Description

bool mysqli_debug ( string debug )

The mysqli_debug() function is used to perform debugging operations using the Fred Fish debugging library. The debug parameter is a string representing the debugging operation to perform.

> 注: To use the mysqli_debug() function you must complile the MySQL client library to support debugging.

## 返回值

mysqli_debug() doesn't return any value.

## 参见

mysqli_dump_debug_info() 和 mysqli_report().

## 范例

例子 1. Generating a Trace File

`<?php /* Create a trace file in '/tmp/client.trace' on the local (client) machine: */ mysqli_debug("d:t:0,/tmp/client.trace"); ?>`

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