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SitePoint PHP Blog:
Handle Incoming Email with SendGrid
August 27, 2013 @ 10:30:34

On the SitePoint PHP blog today Lukas White has a new tutorial showing you how to handle incoming emails from SendGrid (well, pulled from SendGrid) and translate them into posts for your blog or site.

In this article, I'm going to look at how you might implement an email-to-post feature, using SendGrid. SendGrid is a service for sending email - usually in bulk, but they also offer a less well-publicized feature for handling incoming email. SendGrid can be configured to handle all incoming messages for a given domain by pinging a URI of your choosing, and by implementing a simple webhook, you can act on the incoming mail accordingly.

He bases the simple example off of the Slim framework, creating a structure with a basic database for users and posts. He then goes through the SendGrid interface, pointing out where you add the hostname and URL to call back when a new email comes in. He includes the code to create the callback functionality that accepts the POST request coming from SendGrid. This is then validated and inserted into the database to be pulled out later by the "posts" page. There's also a bit about saving images (or other files) that come in as attachments to the email.

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Link: http://www.sitepoint.com/handle-incoming-email-with-sendgrid/

Lorna Mitchell's Blog:
Accessing Incoming PUT Data from PHP
July 31, 2008 @ 12:05:35

For a recent REST web service project, Lorna Mitchell had to put together a server for the remote clients to use. She started with a GET request then moved to handling a POST request then to a PUT request - that's where the difficulty came in:

PHP doesn't have a built-in way to do this, and at first I was a little confused as to how I could reach this information. It turns out that this can be read from the incoming stream to PHP, php://input.

Pulling from that stream gave her the raw data she needed (nicely urlencoded too) that she could parse out and use. She includes a simple example that has a check for the REQUEST_TYPE in the _SERVER superglobal to see how the request should be handled (PUT versus GET).

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DevShed:
Validating Incoming Data by Using Polymorphism with Objects in PHP 5
April 05, 2007 @ 10:56:00

DevShed has posted the final part of their look at using polymorphism with objects in PHP5, this time with a focus on validating incoming data from a form.

In this final installment of the series I'm going to show you how to develop an expandable PHP mechanism for validating different types of incoming data. This will demonstrate how this important pillar of object-oriented programming can be used with a plethora of applications.

They show how to create a simple DataValidator class to act as a base to build from. On top of this, they create classes to validate if the value is:

  • empty
  • an integer
  • if it's numeric
  • if it's in a certain range
  • if it's alphanumeric
  • if it's alphabetic
  • or if it's a valid email address
They also include how to implement these filters, showing a simple Factory pattern that creates the object and runs the value through its validation.

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