On busy servers you might need to take off everything that is not used. If Apache logs are neither watched nor analyzed, you should simply turn them off. How to do it? Simply, as usual: open httpd.conf and unload #LoadModule log_config_module modules/mod_log_config.so by commenting this line. You should also search for various log strings that should be found… Read More »
Sometimes you need to perform any specific tasks that require nobody accesses the page while it is being edited. There may be some tests, database update or anything else. So your task is to deny access to your site from all ips except yours. Note, that all your site visitors should not be redirected anywhere, but should be… Read More »
If you have installed Apache and Bind by yourself, they do not start automatically upon your server boot. In order to start them you don’t need any special knowledge, only a small linux command. chkconfig –level 235 httpd on chkconfig –level 235 named on This will start these services automatically on runlevels 2,3 and 5. You don’t need… Read More »
Sometimes you need to have a look at Apache status, especially, if your server serves many users and if often busy. You should monitor you server’s CPU load, and view other Apache performance information. There is a simple solution in httpd.conf, that allows you to do this directly from your browser. All you need is just to add… Read More »
Sometimes you need to encode the whole URL, not just specific characters that are encoded with urlencode(). You might need to represent your query string or anything else as shown at W3C School. There is quite a simple solution in PHP: <? $string=”some-string”; for ($i=0; $i<strlen($url); $i++) { $mass[$i]=”%”.dechex(ord($url{$i})); } $encoded_string=implode(“”, $mass); ?> In the sample provided the… Read More »
If your server does not have any kind of graphic interface (Directadmin, Cpanel, etc…), you’ll have to create Apache Virtualhosts manually. You will need a working Virtualhost template for this. Using Apache example will guide you to problems with .htaccess files, therefore it will work too. I will show you a working example for Apache 2. Here it… Read More »
Sometimes you need to run several copies of one script at the same time. The easiest method is to do something like this: for($i=0;$i<10;$i++) { system (“/usr/local/bin/php go.php $i > start.log &”); echo “thread $i started”; } ?> Not very elegant, but it works, if you are allowed to use PHP’s system() function. I will tell you how… Read More »
Sometimes you need to use the variables passed to script avoiding usage of superglobal arrays. If you are on shared hosting, you won’t have access to your php.ini file and won’t be able to change register_globals setting. A simple function will help you to do this. <? /** * function to emulate the register_globals setting in PHP *… Read More »
If you just got a clean server without PHP installed and you are trying to do this, you might receive the following error: configure: error: no acceptable cc found in $PATH. This means you don’t have c compiler installed. Just type in yum install gcc and install all the necessary libs. Then you might receive the following message… Read More »
If you’re using Directadmin, you might have noticed that once a day it slows down the server. There is an easy solution to make this run without affecting too much on the server performance. If you wanted to slow down the dataskq, edit: /etc/cron.d/directadmin_cron (or /etc/crontab, depending on your OS) change: Code: * * * * * root… Read More »