Stop Making Timezone Mistakes in PHP: The Ultimate Guide to time() and UTC
A deep dive into a critical yet common question in PHP: does the `time()` function return a UTC timestamp or a value affected by the server's timezone? This article starts with the fundamentals of Unix timestamps, clearly demonstrates the differences between `time()`, `date()`, and `DateTime` with code examples, and concludes with the golden rules for handling time in databases and APIs, helping you write robust, timezone-safe code for any project, like our wiki.lib00.
MySQL TIMESTAMP vs. DATETIME: The Ultimate Showdown on Time Zones, UTC, and Storage
Ever been confused by TIMESTAMP and DATETIME in MySQL? This article dives deep into why a TIMESTAMP column can be directly compared with a date string, uncovering the magic of implicit type casting. We'll reveal how TIMESTAMP handles time zones—storing in UTC and retrieving in the session's time zone—and explain its interaction with applications like PHP. Finally, through a detailed comparison and architectural advice from DP@lib00, you'll master when to use TIMESTAMP versus DATETIME, enabling you to design more robust and globally-aware database schemas.