refs #4: Add PHP 7 support as it is now mature.

php7/Dockerfile

@@ -1,4 +1,4 @@
-FROM ubuntu:14.04
+FROM ubuntu:16.04
 MAINTAINER Joongi Kim "[email protected]"
 
 # Add an isolated user
@@ -21,10 +21,10 @@ RUN sed -i 's/archive\.ubuntu\.com/kr.archive.ubuntu.com/' /etc/apt/sources.list
 RUN apt-get update && apt-get upgrade -y
 RUN apt-get install -y language-pack-en-base python-software-properties software-properties-common
 ENV LC_ALL=en_US.UTF-8
-RUN add-apt-repository ppa:ondrej/php-7.0 && apt-get update
-RUN apt-get install -y git-core wget php7.0-cli php7.0-gd php7.0-sqlite3 php7.0-dev php-pear
+RUN apt-get install -y php7.0-cli php7.0-gd php7.0-sqlite3 php7.0-dev php-pear
 RUN apt-get install -y pkg-config libzmq3-dev
 RUN echo '' | pecl install zmq-beta
+RUN echo 'extension=zmq.so' > /etc/php/7.0/cli/conf.d/20-zmq.ini
 
 # Secure installation scripts
 USER root

php7/run.php

@@ -1,3 +1,76 @@
 <?php
 
-# TODO: implement!
+# This class hides REPL's variable scope from user codes.
+class CodeExecutor {
+    public function execute($code) {
+        $f = function () use ($code) { eval($code); };
+        $f = $f->bindTo(null);
+        $f();
+    }
+}
+
+function _main() {
+
+    $exceptions = array();
+
+    $errhandler = function ($errlvl, $errstr, $errfile, $errline, $errcontext)
+                  use (&$exceptions)
+    {
+        array_push($exceptions, array(
+            "$errstr (Line: $errline)",
+            array(),
+            false,
+            NULL
+        ));
+        return true;  # do NOT continue PHP's own error processing
+    };
+
+    $exchandler = function ($ex) use (&$exceptions)
+    {
+        $exc_name = get_class($ex);
+        array_push($exceptions, array(
+            "$exc_name",
+            array($ex->getMessage()),
+            false,
+            $ex->getTraceAsString()
+        ));
+    };
+
+    chdir('/home/work');
+
+    $context = new ZMQContext();
+    $server = new ZMQSocket($context, ZMQ::SOCKET_REP);
+    $server->bind('tcp://*:2001');
+    echo 'serving at port 2001...';
+
+    while (true) {
+        $data = $server->recvMulti();
+
+        $exceptions = array();  # reinit the array
+        set_error_handler($errhandler);
+        ob_start();
+
+        try {
+            # $data[0] (cell_id) is unused currently.
+            $c = new CodeExecutor();
+            $c->execute($data[1]);
+        } catch (Exception $ex) {
+            $exchandler($ex);
+        } finally {
+            $output = ob_get_flush();
+            restore_error_handler();
+            $stderr = NULL;
+            $reply = array(
+                'stdout' => $output,
+                'stderr' => $stderr,
+                'exceptions' => $exceptions
+            );
+            $server->send(json_encode($reply));
+        }
+    }
+
+}
+
+_main();
+
+# vim: ts=8 sts=4 sw=4 et

tests/test.py

@@ -248,6 +248,23 @@ def basic_failure(self):
         yield '$x = 0 / 0;', ('Division by zero', None)
 
 
+class PHP7ImageTest(ImageTestBase, unittest.TestCase):
+
+    image_name = 'kernel-php7'
+
+    def basic_success(self):
+        yield 'echo "hello world";', 'hello world'
+        yield '$a = 1; $b = 2; $c = $a + $b; echo "$c";', '3'
+        yield 'echo isset($my_nonexistent_variable) ? "1" : "0";', '0'
+        # checks if our internal REPL code is NOT exposed.
+        yield 'echo isset($context) ? "1" : "0";', '0'
+        yield 'global $context; echo isset($context) ? "1" : "0";', '0'
+
+    def basic_failure(self):
+        yield 'throw new Exception("asdf");', ('Exception', 'asdf')
+        yield '$x = 0 / 0;', ('Division by zero', None)
+
+
 class Nodejs4ImageTest(ImageTestBase, unittest.TestCase):
 
     image_name = 'kernel-nodejs4'