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Mastering Deep Array Updates in Laravel with the replaceRecursive Method

4 min readJan 23, 2025

When working with complex data structures in Laravel, especially arrays that contain nested elements, updating specific parts of the array without affecting the rest of the data can be a challenging task. This is where Laravel’s replaceRecursive method shines. It provides a clean and efficient way to update specific values in a deeply nested array while leaving other parts of the array unchanged.

Whether you’re dealing with default configuration values, user preferences, or multi-level data that requires merging, replaceRecursive allows you to perform these updates seamlessly. In this article, we'll explore how to use this powerful method, along with a practical example that demonstrates its capabilities.

What is replaceRecursive?

The replaceRecursive method in Laravel allows you to perform a deep merge of arrays, replacing values in the original array with values from a new array, recursively. This means that instead of updating only the top-level keys, replaceRecursive will dive into nested arrays and update only the values that are specified, preserving the structure of other data that you don't need to modify.

Basic Usage of replaceRecursive

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