Merge commit '36bca61764984ff5395653cf8377ec5daa71b709' as 'libs/protobuf'

libs/protobuf/kokoro/macos/test_php.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -eux
+
+pushd php
+rm -rf vendor
+php -v
+php -m
+composer update
+composer test_c
+popd
+
+git clean -fXd
+bazel test $(kokoro/common/bazel_flags.sh) \
+  --action_env=PATH --test_env=PATH \
+  //php:conformance_test_c