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This article explains the PHP usort() function, its syntax, how to write comparison callbacks, and provides practical examples for sorting numeric arrays, associative arrays of objects, and handling common pitfalls such as stability and in‑place modification.
This article explains how PHP's usort() function sorts arrays using a user‑defined comparison function, covering its syntax, example implementations for numeric and associative arrays, and important usage considerations, including code samples, handling of return values, and common pitfalls such as stability and side effects.
This article explains the PHP usort() function, its syntax, how to write comparison callbacks, and demonstrates sorting numeric arrays, strings, and objects such as student records by age, while highlighting important usage considerations and pitfalls.
This article explains the PHP usort() function, its syntax, how to write custom comparison callbacks, and provides practical examples for sorting numeric arrays, associative arrays of objects, and handling important considerations such as return values, mutability, and stability.