What are the best practices for maintaining key integrity when manipulating arrays in PHP?

When manipulating arrays in PHP, it is important to maintain key integrity to avoid unexpected behavior or errors. One way to ensure key integrity is to use array functions that preserve keys, such as array_merge or array_replace. Additionally, you can use array_values to reindex the array if needed. 

// Example of maintaining key integrity when merging arrays
$array1 = ['a' => 1, 'b' => 2];
$array2 = ['b' => 3, 'c' => 4];

// Merge arrays while preserving keys
$mergedArray = array_merge($array1, $array2);

print_r($mergedArray);

Keywords

array manipulation key integrity PHP data structure error handling

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