You can disable/enable safe_mode either using .htaccess, php.ini or httpd.conf file. Selecting the right way depends on your php-apache configuration.
If php is compiled as a dso module for apache, you will have to use .htaccess method
If php-apache relationship is CGI, then php.ini file is used to disable safe_mode value
 If none …

PHP eAccelerator is a free open source PHP accelerator, optimizer and dynamic content cache module that specially build to optimize php performance. According to php eaccelerator official site, php accelerator able to speed up the php code by 1-10 times and reduce server load.
 
Installing PHP eAccelerator from source
Requirements
     * php4 or php5
    * autoconf
    * automake
    * libtool
    …

   APC MM cache is an most commonly used php accelerators 

Please follow the steps to install APC mem Cache

1. cd /usr/local/src
2. wget http://pecl.php.net/get/APC-3.0.14.tgz
3. tar -xzvf APC-3.0.14.tgz
4. cd APC-3.0.14

 
 checking  the location of phpize and php-config paths

finding the  Phpize binary location

whereis phpize

output looks like:

phpize: /usr/bin/phpize /usr/local/bin/phpize

whereis php-config

output looks like:

php-config: /usr/bin/php-config /usr/local/bin/php-config

5. execute the command …

 1. Create a directory to do our work 

mkdir ~/ffmpeg
cd ~/ffmpeg

2. Get all the source files

wget http://www3.mplayerhq.hu/MPlayer/releases/codecs/essential-20061022.tar.bz2
wget http://rubyforge.org/frs/download.php/9225/flvtool2_1.0.5_rc6.tgz
wget http://easynews.dl.sourceforge.net/sourceforge/lame/lame-3.97.tar.gz
wget http://superb-west.dl.sourceforge.net/sourceforge/ffmpeg-php/ffmpeg-php-0.5.0.tbz2
wget http://downloads.xiph.org/releases/ogg/libogg-1.1.3.tar.gz
wget http://downloads.xiph.org/releases/vorbis/libvorbis-1.1.2.tar.gz

3. Extract all the source files

bunzip2 essential-20061022.tar.bz2; tar xvf essential-20061022.tar
tar zxvf flvtool2_1.0.5_rc6.tgz
tar zxvf lame-3.97.tar.gz
bunzip2 ffmpeg-php-0.5.0.tbz2; tar xvf ffmpeg-php-0.5.0.tar
tar zxvf libogg-1.1.3.tar.gz
tar zxvf libvorbis-1.1.2.tar.gz

4. Create the codecs directory & import them

mkdir /usr/local/lib/codecs/
mv …