MRC PHP Extension Installation and Testing¶

4.1 Build the MRC module¶

Download php_mrc_src_1_5_1.tgz

cd to your php devel directory¶

> cd /usr/include/php/ext/
> mv [downloads]/php_mrc_src_1_5_1.tgz .

Untar the archive¶

> tar zxvf php_mrc_src_1_5_1.tgz
> cd mrc/

Make sure that GD and FFTW 3 devel libraries are installed¶

> phpize
> ./configure 
> make
> make install

4.2 Install MRC module¶

Check that mrc.so is in your php extension directory¶

> ls /usr/lib/php/extensions

You should see mrc.so listed.

Make sure that GD and FFTW 3 libraries are installed¶

• edit your php configuration file php.ini to add "mrc.so" extension.
• You might also increase the memory_limit field. It is set to 8M by default. The more the merrier!
• 4kx4k float MRC image is about 64MB
  

  > vi /etc/php.ini
  

• increase memory
  

  > memory_limit = 256M; Maximum amount of memory
  

• Create the mrc.ini file

> cd /etc/php.d
vi mrc.ini

• add the following lines

 ; Enable mrc extension module
 extension=mrc.so

NOTE: If PHP modules are already listed in PHP.ini do the following:

• check extension_dir value
  

   extension_dir = /usr/lib64/php/extensions
  

• add the following at the end of the [extension section]

 extension=mrc.so

Restart your webserver¶

/etc/init.d/apache2 restart

OR

/etc/init.d/httpd restart

4.3 Test the MRC module installation¶

Download this MRC file mymrc.mrc and the following 2 scripts into the same directory to test the PHP mrc extension.

• gd module testing script ex1.php
• fftw module testing script ex2.php

Run the scripts with the following commands:
The expected results are shown below. If you get the same images, you've installed the extension properly.

> php -q ex1.php | display

• gd module test result:
  

> php -q ex2.php | display

• fftw module test result:
  

Test files work but images not showing up in the ImageViewers?
Here's one way this was fixed.