Detailed description of the role of Xdebug and its installation and configuration_PHP tutorial

Speaking of PHP code debugging, for experienced PHPers, most of the problems encountered in work can be solved very quickly through simple echo, print_r, var_dump functions, or PHP development tools zend studio and editplus , but it is quite difficult for PHP novices to locate and solve problems just through these simple debugging statements. Xdebug, as a code debugging tool specially designed for PHP, is undoubtedly a huge challenge for us. Gospel.

As a PHP debugging tool, convenient. Today I will share with you the installation and configuration knowledge of Xdebug, a PHP source code performance debugging tool.

The installation and configuration of Xdebug in PHP involves modification of the php.ini configuration file.

First download and install Xdebug:
(1) Log in to www.xdebug.org/, there is a download/SVN in the homepage navigation bar, click to enter the download page, select 5.2 VC6 (32 bit) under Xdebug 2.1.0rc1, and download php_xdebug-2.1.0RC1-5.2 -vc6.dll file;
(2) Place the downloaded php_xdebug-2.1.0RC1-5.2-vc6.dll into the C:php5ext directory and rename it to php_xdebug.dll;
The next step is to modify the configuration file php.ini file:
(3) Edit php.ini and add the following lines:

[Xdebug]
zend_extension="c:/php5/ext/php_xdebug-2.1.0RC1-5.2-vc6.dll"

#Special tip: Use zend_extension_ts when configuring Xdebug for versions before PHP5.3. For versions above PHP5.3, use zend_extension
(4) Restart Apache and check the Xdebug installation information through the phpinfo() function. If xdebug is seen in the output, the installation and configuration are successful.
After the above steps, the basic installation of Xdebug is over. Now we need to make some basic configurations for Xdebug.
Xdebug configuration tutorial
After installing Xdebug, we still need to do basic configuration of Xdebug. By default, Xdebug's PHP function automatic tracing (auto_trace) function and analyzer function are not turned on. To debug PHP code, some Xdebug configuration options are best turned on.

Before this, we need to create the directory where Xdebug automatic tracing and analyzer output files are stored. Make sure the directory is readable and writable. Here I created the xdebugtrace and xdebugprofiler directories under D:PHPWeb.

Finally complete the configuration of Xdebug in the php.ini configuration file, and add the following code segment below the code segment that configures Xdebug above:

xdebug.auto_trace=1
xdebug.collect_params=1
xdebug.collect_return=1
xdebug.trace_output_dir="D:/PHPWeb/xdebug/trace"
xdebug.profiler_enable=1
xdebug.profiler_output_dir="D:/PHPWeb/xdebug/profiler"

Finally save php.ini and restart the Aapche server.

The following is a description of some configuration options of Xdebug:

xdebug.auto_trace=1
Whether to allow Xdebug to track function calls. The tracking information is stored in file form. The default value is 0

collect_params=1
Whether to allow Xdebug to track function parameters, the default value is 0

xdebug.collect_return=1
Whether to allow Xdebug to track function return values, the default value is 0

xdebug.profiler_enable=1
Open the xdebug performance analyzer and store it in file form. This configuration cannot be configured with the ini_set() function. The default value is 0

xdebug.profiler_output_dir
The storage location of performance analysis files. The default value is /tmp

xdebug.profiler_output_name
Naming rules for performance analysis files, the default value is cachegrind.out.%p

xdebug.trace_output_dir
Function call tracking information output file directory, the default value is /tmp

xdebug.trace_output_name
Function call trace information output file naming rules, the default is trace.%c

Special note: The output file name rules of Xdebug's trace and profiler can be changed. For example, the file name can be named as the specific traced PHP execution file name, process ID, random number, etc., which is very convenient. More For Xdebug configuration option description, please refer to the Xdebug configuration option description on the official website.

This completes the installation and configuration of Xdebug in the PHP debugging tool Xdebug tutorial. I hope it can be helpful to you.

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