A Complete Guide to PHP's `array_column()` Function

PHP's array_column() function extracts a single column from multi-dimensional arrays or arrays of objects. The function accepts an input array, a column key to extract, and an optional index key for the resulting array. It works with both associative arrays and object arrays, enabling developers to transform complex data structures into simpler, more manageable formats. The guide covers basic extraction, custom indexing, and object handling with practical code examples.