PHP

As of writing, the current pecl runkit-0.9 package does not compile with PHP 5.2+ . Below is how I got the latest installed from svn trunk on CentOS-5.4 with php-5.2.9.

• Install runkit:
  
        svn co http://svn.php.net/repository/pecl/runkit/trunk/
      cd trunk
      phpize
      ./configure
      make
      make install

• Create "/etc/php.d/runkit.ini":
  
        extension=runkit.so

• Restart apache and validate with phpinfo.

Note: you would need php-pear and php-devel installed already.

As of this writing, the latest versions were:

• apache_1.3.41
  
• php-4.4.8
  
• openssl-0.9.8g
  
• mod_ssl-2.8.31-1.3.41

Once the files are downloaded and extracted; config, compile and install in the below order:

1. Install openssl:
   
   $ ./config --prefix=/usr/local --openssldir=/usr/local/openssl
$ make
# make install

2. mod_ssl patch:
   
   $ ./configure \
--with-ssl=../openssl-0.9.8g \
--with-apache=../apache_1.3.41

3. Pre-configure apache:
   
   $ ./configure

4. Install php:
   
   $ ./configure \
--with-gd \
--with-jpeg-dir \
--with-png-dir \
--with-zlib-dir \
--with-freetype \
--with-freetype-dir=/usr/lib \
--enable-gd-native-ttf \
--enable-memory-limit \
--with-ldap \
--with-mysql \
--with-apache=../apache_1.3.41
$ make
# make install

5. Install apache
   
   $ SSL_BASE=../openssl-0.9.8g \
./configure \
--prefix=/usr/local/apache \
--enable-module=rewrite \
--enable-module=so \
--activate-module=src/modules/php4/libphp4.a \
--enable-module=ssl

1. Download and unpackage the source files:
   
   $ cd /usr/local/src
$ wget http://www.ibiblio.org/pub/mirrors/apache/httpd/apache_1.3.41.tar.gz
$ wget http://us2.php.net/get/php-4.4.8.tar.gz/from/us.php.net/mirror
$ tar -xvzf apache_1.3.41.tar.gz
$ tar -xvzf php-4.4.8.tar.gz

2. Preconfigure apache:
   
   $ cd apache_1.3.41
$ make clean
$ ./configure

3. Configure, compile, install php:
   
   $ cd ../php-4.4.8
$ make clean
$ ./configure \
--with-gd \
--with-jpeg-dir \
--with-png-dir \
--with-zlib-dir \
--with-freetype \
--with-freetype-dir=/usr/lib \
--enable-gd-native-ttf \
--enable-memory-limit \
--with-ldap \
--with-mysql=/usr/local/mysql \
--with-apache=../apache_1.3.41
$ make
# make install

4. Configure, compile, install apache:
   
   $ ./configure \
--prefix=/usr/local/apache \
--enable-module=rewrite \
--enable-module=so \
--activate-module=src/modules/php4/libphp4.a
$ make
# make install

Recently a particular folder in a site started coming up with blank php pages and the root cause being Segmentation fault after memory exhaustion. The subfolder contents would only come up after doing a restart of apache.

So something tried to access a region of memory that it did not have rights to. May be due to either bad RAM, or a code problem.

My first instinct was eAccelerator as I had done a recent php update and had not re-compiled it.

I still had the same issue the next day and bumped up the memory_limit from 16M to 32M in php.ini and from 32M to 64M in eaccelerator.ini .

Download the source tar.gz file from php.net and place it in "/usr/local/directadmin/customapache"

Edit the "/usr/local/directadmin/customapache/build" file and change the version of php to the version that was downloaded.

Then run:

Restart apache when finished.

Godaddys' linux hosting allows for editing your own "php.ini" file and enables support for logging errors, good for debugging purposes when developing with php.

Add the below lines to php.ini in the document root, to log all errors:

You should also protect the php.ini and error_log file via .htaccess:

Place the snippet of code in an index.php file to pull up a different web page for each domain pointed to the same web-space.

Latest Compile with pdo drivers for mysql along with mod_security.

NOTE:
Remove the MySQL-shared rpm else openssl will not work.

If you have heavy pages with lots of images and text, you can greatly improve its' performance by dynamically compressing the page with php.

Put the below code in the header of each php page.

It automatically gzips the page for browsers that support it.

This could also be set in the php.ini file instead, so all php pages are automatically compressed without having to add the above code in each and every php page.

In php.ini add the below code:

This seems to occur if mysql crashes for some reason and corrupts the sessions table for Drupal.
Here is a quick way to resolve this and I have used it in the past...

mysql> REPAIR TABLE sessions QUICK;

You can also use phpmyadmin to repair the table.

Related Reading: MySQL Database Repair