fix functions error

setup/functions.sh

@@ -4,8 +4,6 @@
 # -o pipefail: don't ignore errors in the non-last command in a pipeline
 set -euo pipefail
 
-PHP_VER=php_version
-
 function hide_output {
 	# This function hides the output of a command unless the command fails
 	# and returns a non-zero exit code.
@@ -227,3 +225,5 @@ function git_clone {
 function php_version {
 	php --version | head -n 1 | cut -d " " -f 2 | cut -c 1-3
 }
+
+PHP_VER=$(php_version)