Create one php app with mongodb cartridge, when accessing the php page, it will create mongo connection, if mongo db stop, it also returns 200.

content of php/mongo.php
---------------------------------------------------------
<?php
header('Content-Type: text/plain');
$m = new Mongo($_ENV['OPENSHIFT_MONGODB_DB_URL']);
#$dbname = "<database_name>";
#$db = $m->$dbname;
$db = $m->$_ENV['OPENSHIFT_APP_NAME'];

$coll = $db->factory;
$count = $coll->find()->count();

if($count == 0) {
  $insert = array("version" => "1");
  $coll->insert($insert);
}

# Accessing the page without arguments
if(empty($_GET["version"])) {
    $obj = $coll->findOne();
    $m->close();
    echo "version ".$obj["version"];
}
else {
    $coll->remove();
    $insert = array("version" => $_GET["version"]);
    $coll->insert($insert);
    $m->close();
    echo "The mongodb factory is modified\n";
}
?>
-----------------------------------------------------

I tracked this down to this: http://bugs.xdebug.org/view.php?id=587

If you install php-pecl-xdebug, PHP files with errors in them come back with a status of 200. If you uninstall that RPM, the status will come back correctly as 500.

Thanks @Andy, so we should be able to fix this bug once we're able to complete the following Trello card: https://trello.com/c/lbjDOA6S. Then users will be able to turn off the Xdebug and thus get rid of this behaviour.

Closing UPSTREAM:

RHEL 6 - bug 1053301
Workaround for OpenShift Origin PHP cartridge - Trello card https://trello.com/c/lbjDOA6S

Fixed in php-pecl-xdebug-2.1.4-2 reportedly. Once the RPM is available for update, we can fix this.

RPM is still not available. We need to wait for new RHSCL release/update.

Verified on devenv_5549. Both php-5.3 and php-5.4 works.