title: Install php mysqli extension without installing mysql server
body: <p>In my linux server, I have installed php v5.2.14 from source, and not installing mysql and apache. As this sever only used to run phpunit, so it's not neccsary to install mysql and apache. The prblem is that some unittest requir mysqli extension. So, I try to install mysqli extension using the code in the php source. however, when exectuing './configure', it stopped for following:</p>
  
  <pre><code>checking for egrep... grep -E
  checking for a sed that does not truncate output... /usr/bin/sed
  checking for cc... cc
  checking for C compiler default output file name... a.out
  checking whether the C compiler works... yes
  checking whether we are cross compiling... no
  checking for suffix of executables...
  checking for suffix of object files... o
  checking whether we are using the GNU C compiler... yes
  checking whether cc accepts -g... yes
  checking for cc option to accept ANSI C... none needed
  checking how to run the C preprocessor... cc -E
  checking for icc... no
  checking for suncc... no
  checking whether cc understands -c and -o together... yes
  checking for system library directory... lib
  checking if compiler supports -R... no
  checking if compiler supports -Wl,-rpath,... yes
  checking build system type... x86_64-unknown-linux-gnu
  checking host system type... x86_64-unknown-linux-gnu
  checking target system type... x86_64-unknown-linux-gnu
  checking for PHP prefix... /home/pu/php
  checking for PHP includes... -I/home/pu/php/include/php -I/home/pu/php/include/php/main -I/home/pu/php/include/php/TSRM -I/home/pu/php/include/php/Zend -I/home/pu/php/include/php/ext -I/home/pu/php/include/php/ext/date/lib
  checking for PHP extension directory... /home/pu/php/lib/php/extensions/no-debug-non-zts-20060613
  checking for PHP installed headers prefix... /home/pu/php/include/php
  checking if debug is enabled... no
  checking if zts is enabled... no
  checking for re2c... no
  configure: WARNING: You will need re2c 0.13.4 or later if you want to regenerate PHP parsers.
  checking for gawk... gawk
  checking for MySQLi support... yes, shared
  checking whether to enable embedded MySQLi support... no
  mysql_config not found
  configure: error: Please reinstall the mysql distribution
  </code></pre>
  
  <p>so i thought it maybe missing mysql causes this problem. 
  Is there any solution for this. I don't want to install mysql server, just installing mysql client or driver is enough.</p>