What are the best practices for handling duplicate IDs in an array and updating corresponding values in PHP?

When handling duplicate IDs in an array and updating corresponding values in PHP, one approach is to loop through the array and use a separate array to store unique IDs. For each ID encountered, check if it already exists in the unique IDs array. If it does, update the corresponding value in the original array. If not, add the ID to the unique IDs array and its corresponding value to the original array. 

<?php

// Sample array with duplicate IDs
$data = [
    ['id' => 1, 'value' => 'A'],
    ['id' => 2, 'value' => 'B'],
    ['id' => 1, 'value' => 'C'],
    ['id' => 3, 'value' => 'D']
];

$uniqueIds = [];
$result = [];

foreach ($data as $item) {
    $id = $item['id'];
    $value = $item['value'];
    
    if (in_array($id, $uniqueIds)) {
        // Update corresponding value in the result array
        $result[array_search($id, array_column($result, 'id'))]['value'] = $value;
    } else {
        // Add ID to unique IDs array and corresponding value to result array
        $uniqueIds[] = $id;
        $result[] = ['id' => $id, 'value' => $value];
    }
}

print_r($result);

?>

Keywords

array duplicate IDs updating values PHP handling

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