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hints [2014/01/29 18:04]
127.0.0.1 external edit
hints [2016/03/27 17:11]
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-====== Hints ====== 
  
-===== PHP Includes ​ ===== 
- 
-Some people include files like  
- 
-include('​http://​otherdomain/​1.html'​);​ 
- 
-or 
- 
-virtual('/​scj/​top/​top.html'​);​ 
- 
-or 
- 
-readfile('​http://​domsin/​1.html'​) 
- 
- 
-moreover they use it may times per page. 
- 
-You should NOT use it. 
- 
-**Why:** 
- 
-PHP creates page BEFORE user gets it. So if you have something like include('​http://​otherdomain/​1.html'​) PHP has to load that page each time user load a page with that include. ​ 
- 
-There 2 downsides of this approach: 
- 
-  * PHP create a regular connection to that host requesting a page. If you have 10 such includes - 1 request to such page generates 10 subrequests loading server. 
-  * If for some reason PHP won't be able to connect to that domain and load that page - it will wait and first page won't be loaded until PHP gets that include. So if that otherdomain is down - first domain will be virtually down too. 
- 
- 
-**What to do:** 
- 
-Use only local includes. 
-Ie virtual('/​scj/​top/​top.html'​) should be include('/​home/​user/​domain/​scj/​top/​top.html'​);​ 
- 
-if file is located at another server - ask admin to setup rsync or copy file using crontab and so on. 
-  
- 
-**Including local script with parameters** 
- 
-Let's say you have include like 
- 
-<​code>​ 
-<?php 
-include('​http://​domain.com/​banner.php?​x=3&​y=2'​);​ 
-?> 
-</​code>​ 
- 
- 
-so you have some parameters here. You can pass it as 
- 
-<​code>​ 
-<?php 
-$_GET['​x'​] = 3; 
-$_GET['​y'​] = 2; 
-include('​banner.php'​);​ 
-?> 
-</​code>​ 
- 
- 
-===== Close site for some countries ===== 
- 
-Example for .htaccess ​ 
- 
-<​code>​ 
-RewriteEngine on 
-RewriteCond %{ENV:​GEOIP_COUNTRY_CODE} ^(RU|CN)$ [NC]  
-RewriteRule ^$ http://​google.com [R,L] 
-</​code>​ 
hints.txt ยท Last modified: 2016/03/27 17:11 (external edit)