How to find the line on which execution was interrupted in PHP
When working with old code, it is sometimes very difficult to find the place where execution was interrupted. Constructions like die, exit, etc. are very bad practice, but there is a lot of legacy code (and not only - I'm not saying anything bad about Wordpress, so I'll keep quiet) that abuse them. One of the biggest problems with such constructions is that they are difficult to find and debug. (Use exceptions!)
But when the task is to find the place where code execution is interrupted, you can use the following snippet:
Iteration over a time period in PHP
Repeatedly had to work with a list of dates on php (by days, for example) if there is a start and end of the period ($dateStart, $dateEnd). For example, to synchronize working/non-working days for the DatePicker from jQueryUi with the backend. Or if you need to display reports by days.
I suggest several options for solving this problem, both the most obvious way and a more elegant way (as it seemed to me).
Usage of Composer
Composer - a dependency manager, or rather, a package manager for php.
Official website: https://getcomposer.org/
Allows you to keep track of components used in a php application, install them, update them, etc.
Working with databases in php. PDO module
In the previous note, we familiarized ourselves with the deprecated mysql module. Here we will provide an example of working with a more modern one.
Working with databases in PHP. MySQL module
If before (before php 5.0) it was possible to use a more or less trivial way of working with databases in php (using the MySQL module), then with new versions of php it is necessary to switch to new modules, such as mysqli or pdo. The MySQL module is deprecated in php 5.5.x and will soon be completely excluded.
In this note we will remind you how to use the MySQL module, but use modern interfaces for work (see the next notes). To use the minimum functionality of the MySQL module you only need to remember a few functions (of course, there are many more of them, here only the necessary minimum is presented).