Programming
Log and Display PHP Errors
PHP decides two things separately: whether to print a problem to the browser, and whether to write it to a file. Set display_errors and…
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Author: admin
Server Administration
Set File and Directory Permissions With chmod
Set file and directory permissions with chmod, numerically and symbolically, and you control exactly who can read, write, or execute anything on a Linux…
Programming
Schedule Recurring Tasks With WP-Cron
Schedule recurring tasks with WP-Cron, WordPress's built-in scheduler. This tutorial hooks a task to a custom action, adds a five-minute interval through cron_schedules, schedules…
Database Administration
Write a Subquery in MySQL
Write a subquery in MySQL to answer a question inside a question - a SELECT nested in another statement's WHERE or column list. This…
Programming
Sort and Filter Arrays in PHP
Sort and filter arrays in PHP with the functions built for the job: sort and asort for flat lists, usort to order rows by…
Server Administration
Create a systemd Service
Create a systemd service to keep a long-running program alive - started at boot, restarted on a crash, logs collected. This tutorial writes a…