PHP array_replace() Function for Replacing Array Values

array_replace(): replace array values

The array_replace() function in PHP is used to replace the values of the first array with the values from subsequent arrays. If a key exists in multiple arrays, the value from the last array will replace the earlier one.

Syntax

array_replace(array $array1, array ...$arrays): array

This function returns an array where values from the second (or subsequent) array replace the matching keys in the first array. If a key is not found in subsequent arrays, it is not replaced.

Example 1: Replacing Simple Indexed Array Values

$array1 = [0 => "red", 1 => "green", 2 => "blue"];
$array2 = [0 => "orange", 2 => "black"];
$result = array_replace($array1, $array2);
print_r($result);

Array
(
    [0] => orange
    [1] => green
    [2] => black
)

Example 2: Replacing Values in an Associative Array

$array1 = ['name' => 'John', 'age' => 30];
$array2 = ['name' => 'Doe', 'city' => 'New York'];
$result = array_replace($array1, $array2);
print_r($result);

Array
(
    [name] => Doe
    [age] => 30
    [city] => New York
)

Example 3: Using Multiple Replacement Arrays

$array1 = [1 => "apple", 2 => "banana"];
$array2 = [2 => "grape"];
$array3 = [1 => "orange"];
$result = array_replace($array1, $array2, $array3);
print_r($result);

Output

Array
(
    [1] => orange
    [2] => grape
)

Conclusion

The array_replace() function provides a flexible way to replace values in an array using one or more replacement arrays. It is especially useful when handling configuration settings or merging data where certain values need to be overwritten.
array_splice(): Modifying Arrays in PHP Difference between arrays considering values
Array REFERENCE

Subhendu Mohapatra

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