on OSX leopard, switch between 2 php's

phpswitch.sh

#!/bin/bash

php52_so_path="/usr/local/php5/lib/libphp5.so"
# /usr/libexec/apache2/libphp5.so will be copied to
#   $php53_so_path if $php53_so_path does not exist
php53_so_path="/usr/libexec/apache2/libphp5.so.apple"
# where apache thinks the php .so file is
apache_conf_php_so_path="/usr/libexec/apache2/libphp5.so"

switch_to_php=$php52_so_path

if [ $# -ne 1 ]
then
  echo "Usage: phpswitch [2|3]"
  exit 1
fi

if [[ "$1" -ne 2 && "$1" -ne 3 ]]
then
  echo "Usage: Single argument should be 2 or 3, [$1] is NOT valid"
  echo "phpswitch [2|3]"
  exit 1
fi

requested_5x_version=$1

# if not a soft link, make copy first (make the assumption 
#   that is is an apple .so)
if [ ! -h ${apache_conf_php_so_path} ]
then
  echo "${apache_conf_php_so_path} was not a soft link, moving to ${php53_so_path}"
  sudo mv ${apache_conf_php_so_path} ${php53_so_path}
fi

if [[ ${requested_5x_version} -eq 3 ]]; then
  switch_to_php=$php53_so_path
fi
 
# exit if cannot find the php so we want to switch to
if [ ! -f ${switch_to_php} ]
then
  echo "${switch_to_php} NOT FOUND"
  exit 1
fi

echo "removing current ${apache_conf_php_so_path}"
sudo rm ${apache_conf_php_so_path}
echo "linking /usr/libexec/apache2/libphp5.so to ${switch_to_php}"
sudo ln -s ${switch_to_php} ${apache_conf_php_so_path}  
echo "restarting apache"
sudo apachectl restart

echo "Note: php cli was not effected (next version of this script maybe)"