Mastering PHP: How to Elegantly Filter an Array by Keys Using Values from Another Array
In PHP development, it's a common task to filter an associative array based on a list of keys provided in another array. This article details two primary methods: using the highly efficient `array_intersect_key` built-in function and the easy-to-understand `foreach` loop. Through concrete code examples, we'll compare their performance and use cases, helping you master the skill of choosing the best solution for different scenarios and write more professional, efficient PHP code.
One-Liner PHP Magic: Securely Filter Arrays with `array_intersect_key` and `array_flip`
Discover the powerful combination of `array_intersect_key` and `array_flip` in PHP. Learn how this one-line solution can efficiently and securely filter arrays to prevent mass assignment vulnerabilities. This article breaks down the technique with a real-world example common in frameworks like Laravel, highlighting its importance in application security.