Category Archives: Web Development

From XHTML to CSS to PHP and everything from web security and usability etc.

Inserting page breaks for printing or PDF via HTML

So we have a web invoice which is also converted into PDF. When line items section becomes too tall (so many items), the generated PDF from HTML (via wkhtmltopdf) breaks some of the lines in the summary section and is … Continue reading

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HTML to PDF – Using custom web fonts

We currently have a working HTML to PDF converter in our project usually used to generate PDF invoices. However, a new requirement requires using a font not usually found on the stock fonts. At this point, I realized that our … Continue reading

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Rails 5 – API Only – Enable Cookies and Sessions

So you’ve been trying a lot of trial and errors just to enable cookie based session on a API only rails app? Are you trying to customize the cookie expiration but it simply defaulting to default session only cookies? The … Continue reading

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Rails 5 – Self Join belongs_to – entity must exist error

Wow, this is my first post for Ruby on Rails and Ruby in general! So what I’m trying to do is very simple: create a self join relationship for the user table like a parent/child relationship. However, Rails always complains … Continue reading

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Docker – AWS S3 PHP Uploads – [curl] 6: Could not resolve host – DNS issues

Last night when I was trying to upload a new profile pic in our app, S3 uploads suddenly stopped working. Other S3 API methods are working fine except for the upload or PUT method. I have done many changes on … Continue reading

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Whipping some anonymous function in PHP

My goal is to validate a $_FILES array where uploaded file is an array of files. Due to the weird format of the $_FILES array for array version of the upload file, I have to validate each fields so that … Continue reading

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Application running on Docker container – Part 2 – Database

This is a continuation of our previous post regarding a simple application running inside a Docker container. This post focuses on the database part of the application stack. Yes, we run the database in a separate container! MariaDB I’m using … Continue reading

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Liquibase – Source control for your database

Many PHP, Python and Ruby frameworks already have their database source control feature either built-in or supported as a plugin. In our case, we didn’t use (PHP) CodeIgniter’s built-in database migration tool nor use any migration tool at all until … Continue reading

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MySQL – Locking reads using transaction

Here is a quick post before I hit work on a Sunday afternoon. I was trying to create some sort of locking mechanism designed to trigger the same tasks from multiple clients but only one should be executed/run. I tried … Continue reading

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Using Symfony Validators outside the Symfony Framework

While we are quite doing fine with our current framework, we are stuck in terms of data validation especially when validation is done deep inside several layers of model classes. I’ve been thinking of either using Zend Validate classes (ZF2) … Continue reading

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