Make sure to get all PHP dependences set up properly

tools/gce/linux_performance_worker_init.sh

@@ -130,7 +130,7 @@ gem install bundler
 
 # PHP dependencies
 
-sudo apt-get install -y php5 php5-dev phpunit php-pear zlib1g-dev
+sudo apt-get install -y php5 php5-dev phpunit php-pear unzip zlib1g-dev
 curl -sS https://getcomposer.org/installer | php
 sudo mv composer.phar /usr/local/bin/composer
 

tools/run_tests/performance/run_worker_php.sh

@@ -31,7 +31,14 @@
 source ~/.rvm/scripts/rvm
 set -ex
 
-cd $(dirname $0)/../../..
+repo=$(dirname $0)/../../..
+
+# First set up all dependences needed for PHP QPS test
+cd $repo
+cd src/php/tests/qps
+curl -sS https://getcomposer.org/installer | php
+php composer.phar install
 
 # The proxy worker for PHP is implemented in Ruby
+cd $repo
 ruby src/ruby/qps/proxy-worker.rb $@