Use consistent naming convention

tests/before_script.sh

@@ -93,8 +93,8 @@ EOF
     sleep 5
     sudo service nginx start
 
-    script_dir="$(dirname "$(readlink -f "$0")")"
-    root="${script_dir}/PHPCurlClass"
+    SCRIPT_DIR="$(dirname "$(readlink -f "$0")")"
+    root="${SCRIPT_DIR}/PHPCurlClass"
     sudo cp -v "${root}/"* "/usr/share/nginx/html/"
 
     # Use an older version of PHPUnit for HHVM builds so that unit tests can be

tests/check_syntax.sh

@@ -1,6 +1,6 @@
-DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
-cd "${DIR}"
+cd "${SCRIPT_DIR}"
 phpcs \
     --extensions="php" \
     --ignore="*/vendor/*" \

tests/run.sh

@@ -1,7 +1,7 @@
 set -x
 
-SCRIPT_PATH="$(cd "$(dirname "$0")"; pwd -P)"
-cd "${SCRIPT_PATH}"
+SCRIPT_DIR="$(cd "$(dirname "$0")"; pwd -P)"
+cd "${SCRIPT_DIR}"
 
 php -S 127.0.0.1:8000 -t PHPCurlClass/ &> /dev/null &
 pid="${!}"