How Can I Efficiently Merge Elements from Two Arrays Based on Their Indices in PHP?

Associating Arrays Based on Index: Pushing Elements from Array1 to Array2 Rows

Given two arrays, array1 and array2, the task is to associate elements from array1 to respective rows of array2 based on their indexes. The goal is to create a new array that combines the elements of both arrays.

A common approach is using a foreach loop with array_merge. However, when used iteratively, this method overwrites the new array with each loop iteration. To overcome this issue, consider utilizing the built-in PHP functions array_merge_recursive or array_replace_recursive:

$newArray = array();
foreach ($array1 as $key => $value) {
    $newArray[$key] = array_merge_recursive($value, $array2[$key]);
}

This code employs array_merge_recursive to combine corresponding elements from array1 and array2 into a new array. It preserves existing data while adding new values.

Alternatively, you can use array_replace_recursive:

$newArray = array();
foreach ($array1 as $key => $value) {
    $newArray[$key] = array_replace_recursive($value, $array2[$key]);
}

array_replace_recursive behaves similarly, but it replaces any existing values in array1 with those in array2.

By utilizing these recursive array functions, you can effectively associate and merge elements from both arrays while maintaining their original structure.

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