tests: drop PHP 7.1 and add PHP 7.2

.kokoro/docker/php74/Dockerfile

@@ -0,0 +1,132 @@
+FROM gcr.io/gcp-runtimes/ubuntu_16_0_4
+ENV PHP_DIR=/opt/php74
+ENV PHP_SRC_DIR=/usr/local/src/php74-build
+ENV PATH=${PATH}:/usr/local/bin:${PHP_DIR}/bin
+
+RUN apt-get update && \
+    apt-get -y install \
+            autoconf \
+            build-essential \
+            git-core \
+            jq \
+            libbz2-dev \
+            libcurl4-openssl-dev \
+            libc-client2007e \
+            libc-client2007e-dev \
+            libfcgi-dev \
+            libfcgi0ldbl \
+            libfreetype6-dev \
+            libicu-dev \
+            libjpeg62-dbg \
+            libjpeg-dev \
+            libkrb5-dev \
+            libmcrypt-dev \
+            libpng12-dev \
+            libpq-dev \
+            libssl-dev \
+            libxml2-dev \
+            libxslt1-dev \
+            libzip-dev \
+            python-ipaddr \
+            wget \
+            zip \
+            zlib1g-dev \
+            pkg-config \
+            sqlite3 \
+            libsqlite3-dev \
+            libonig-dev \
+            php-pear
+
+RUN ln -s /usr/lib/libc-client.a /usr/lib/x86_64-linux-gnu/libc-client.a && \
+    mkdir -p ${PHP_DIR} ${PHP_SRC_DIR} ${PHP_DIR}/lib/conf.d && \
+    cd ${PHP_SRC_DIR} && \
+    wget http://us1.php.net/get/php-7.4.0.tar.bz2/from/this/mirror \
+         -O php-7.4.0.tar.bz2 && \
+    tar jxf php-7.4.0.tar.bz2 && \
+    cd php-7.4.0 && \
+    ./configure \
+        --prefix=${PHP_DIR} \
+        --with-config-file-scan-dir=${PHP_DIR}/lib/conf.d \
+        --with-pdo-pgsql \
+        --with-zlib-dir \
+        --with-freetype-dir \
+        --enable-mbstring \
+        --with-libxml-dir=/usr \
+        --enable-soap \
+        --enable-intl \
+        --enable-calendar \
+        --with-curl \
+        --with-mcrypt \
+        --with-zlib \
+        --with-gd \
+        --with-pgsql \
+        --disable-rpath \
+        --enable-inline-optimization \
+        --with-bz2 \
+        --with-zlib \
+        --enable-sockets \
+        --enable-sysvsem \
+        --enable-sysvshm \
+        --enable-sysvmsg \
+        --enable-pcntl \
+        --enable-mbregex \
+        --enable-exif \
+        --enable-bcmath \
+        --with-mhash \
+        --enable-zip \
+        --with-pcre-regex \
+        --with-mysql \
+        --with-pdo-mysql \
+        --with-mysqli \
+        --with-jpeg-dir=/usr \
+        --with-png-dir=/usr \
+        --enable-gd-native-ttf \
+        --with-openssl \
+        --with-fpm-user=www-data \
+        --with-fpm-group=www-data \
+        --with-libdir=/lib/x86_64-linux-gnu \
+        --enable-ftp \
+        --with-imap \
+        --with-imap-ssl \
+        --with-gettext \
+        --with-xmlrpc \
+        --with-xsl \
+        --with-zip \
+        --with-kerberos \
+        --enable-fpm && \
+        make && \
+        make install && \
+        pecl install grpc && \
+        cp php.ini-production ${PHP_DIR}/lib/php.ini && \
+        echo 'zend_extension=opcache.so' >> ${PHP_DIR}/lib/php.ini && \
+        echo 'extension=grpc.so' >> ${PHP_DIR}/lib/conf.d/ext-grpc.ini && \
+        php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" && \
+        php -r "if (hash_file('SHA384', 'composer-setup.php') === rtrim(file_get_contents('https://composer.github.io/installer.sig'))) { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;" && \
+        php composer-setup.php --filename=composer --install-dir=/usr/local/bin
+
+# Remove old version of PHP
+RUN apt purge -y php7.0-common
+
+# Install phpunit globally
+RUN composer global require phpunit/phpunit:^7.0
+
+# Install Google Cloud SDK
+RUN curl https://dl.google.com/dl/cloudsdk/release/google-cloud-sdk.tar.gz \
+        -o ${HOME}/google-cloud-sdk.tar.gz \
+    && tar xzf ${HOME}/google-cloud-sdk.tar.gz -C $HOME \
+    && ${HOME}/google-cloud-sdk/install.sh \
+        --usage-reporting false \
+        --path-update false \
+        --command-completion false
+
+# Make composer and gcloud bins available via the PATH variable
+ENV PATH="$PATH:/root/.composer/vendor/bin:/root/google-cloud-sdk/bin"
+
+# Configure Google Cloud SDK
+RUN gcloud config set app/promote_by_default false && \
+    gcloud config set disable_prompts true && \
+    gcloud -q components install app-engine-python && \
+    gcloud -q components update
+
+# Build php-cs-fixer
+RUN composer global require friendsofphp/php-cs-fixer

.kokoro/php73.cfg

@@ -15,7 +15,3 @@ env_vars: {
     key: "GOOGLE_ALT_CREDENTIALS_FILENAME"
     value: "service-account-kokoro3.json"
 }
-env_vars: {
-    key: "RUN_CS_CHECK"
-    value: "true"
-}

.kokoro/php71.cfg → .kokoro/php74.cfg

@@ -3,7 +3,7 @@
 # Configure the docker image for kokoro-trampoline.
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
-    value: "gcr.io/cloud-devrel-kokoro-resources/php71"
+    value: "gcr.io/cloud-devrel-kokoro-resources/php74"
 }
 
 # Give the docker image a unique project ID and credentials per PHP version
@@ -15,3 +15,7 @@ env_vars: {
     key: "GOOGLE_ALT_CREDENTIALS_FILENAME"
     value: "service-account-kokoro1.json"
 }
+env_vars: {
+    key: "RUN_CS_CHECK"
+    value: "true"
+}

appengine/flexible/helloworld/composer.json

@@ -1,6 +1,5 @@
 {
   "require": {
-    "php": "5.6.*|7.0.*|7.1.*|7.2.*|7.3.*",
     "silex/silex": "^2.3"
   },
   "require-dev": {