Language performance optimizations for PHP performance: vld--view Code opcode artifacts

VLD Introduction

VLD is a php extension of pecl (PHP extension and application repository), and now the latest version is 0.14.0(2016-12-18), which is to display the internal representation of the dump PHP script (opcode) ( Introduction to VLD from Pecl ). Simply put, you can see the PHP program's opcode.

　　

　　

Installation of the VLD extension

　1, download the official plug-in installation compression package

Official website: HTTP://PECL.PHP.NET/PACKAGE/VLD

　　　　

Download command:# wget http://pecl.php.net/get/vld-0.14.0.tgz

Note: Download the URL is on the relative version of the link, right click, copy the link can

　2. Unpacking

Unpacking command:# tar zxvf vld-0.14.0.tgz

　　3. Compiling and installing

Enter the extracted VLD directory:# CD vld-0.14.0/

　　　　Extension PHP Extension:# phpize

Use locate to find Php-config path:# Locate Php-config

　　　　　Note: Locate command: "# Yum-y Install Mlocate" after the installation using "# UpdateDB" after updating data can be used directly

The php-config found are as follows:

　　　　　　

Configure the php-config path of the compiled VLD:#./configure--with-php-config=/usr/bin/php-config--ENABLE-VLD

Compile and install:# make && make install

　　4. Restart the server

Restart Apache:# systemctl Restart Httpd.service

Restart Nginx and PHP-FPM (restart if Nginx is available):

　　　　　　# systemctl Restart Nginx.service

# systemctl Restart Php-fpm.service

Note: Systemctl is a new version of the CentOS system, there is no such command can use the following three commands instead

　　　　　　# Service Apachectl Restart

# Service Nginx Restart

# service PHP-FPM Restart   

Testing for VLD extensions

Use the Phpinfo () function to test whether the installation was successful, Test Code:

<? PHP      Phpinfo ();? >

1, the use of network access results are as follows (display enabled):

　　　　　　

2. Use command test (show enabled):

Command is:# php test.php | grep "VLD"

　　　　　　

So, how do vld use pinch?

VLD cannot be used alone, it needs to be combined with PHP commands. Its main two parameters are -dvld.active (equals 1 proof is using VLD extension) and -dvld.execute (equals 1 proof is required to hold the PHP file, default is 1).

Test command:# php-dvld.active=1-dvld.execute=0 test.php

(means to run test.php, use VLD plug-in, do not execute, only show opcode)

　　

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Language performance optimizations for PHP performance: vld--view Code opcode artifacts