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Thread tagged as: Question, Problem, Add-on-development

Functions in runtime.php needing to be accessed via AJAX

Hi guys,

I'm trying to develop a really small app for Perch, and I'm having a little trouble.

Essentially, once a button on a page is clicked, I'll need to run a function included in runtime.php, and add/remove some stuff from a database.

I've not had much luck so far - I can't seem to access any Perch functionality (e.g Perch constants) when accessing the function using ajax to send a POST request to /cms/addons/apps/my_app/runtime.php.

Has anyone got any tips for running functions through AJAX like this?
Harry Ray

Harry Ray 0 points

  • 3 years ago
Drew McLellan

Drew McLellan 2638 points
Perch Support

3 years ago

There's a good example in the Twitter app:

perch_twitter/async/tweet-length/index.php
Harry Ray

Harry Ray 0 points

3 years ago

Hi Drew,

Thanks for that - I'm not too sure what's going on with that file but I'm using the realpath code to include my runtime.php file now.

The way that this function is currently working is:

  1. User clicks button on front-end of website.

  2. AJAX Request to /perch/addons/apps/my_app/user_interaction.php.

  3. This file runs a function that's contained within runtime.php, which is included via realpath().

My Class files are called inside runtime.php. However, when I try to run this process through, I get a 500 Error, detailed below, PHP Fatal error: Class 'PerchAPI_Factory' not found.

Any ideas on this one?
Drew McLellan

Drew McLellan 2638 points
Perch Support

3 years ago

Are you including the Perch runtime, or your app's? You need the central Perch runtime.
Harry Ray

Harry Ray 0 points

3 years ago

I'm including my app's runtime.php - I figured I probably needed to include some kind of Perch core file but when I tried to use include('../../../core/inc/api.php'); in my runtime.php yesterday, it didn't work and indicated the I wasn't able to access that file due to a permissions error (presumably because I wasn't logged in to Perch?).

I've updated my app's runtime.php to start with include_once($_SERVER['DOCUMENT_ROOT'].'/perch/runtime.php');, as just using include threw the "Included more than once" error.

Currently, I've got an issue with my database statements, looks like my connection is failing - but I don't think this is a Perch issue.

Thanks for all the help here, Drew!
Drew McLellan

Drew McLellan 2638 points
Perch Support

3 years ago

Include the /perch/runtime.php file. You don't need to include anything else - it's then done for you.