PHP array_merge_recursive() – Recursively Merges One or More Arrays
The article explains how PHP's array_merge_recursive() function combines multiple arrays by recursively merging values with identical keys, describes its parameters and return value, and provides a complete code example with expected output.
The PHP function array_merge_recursive() merges one or more arrays recursively, appending values from later arrays to earlier ones and combining values with identical string keys into sub‑arrays.
Parameters
array1 – the initial array to merge. ... – additional arrays to be merged recursively.
Return value
An array containing the merged values.
Example
array("favorite" => "red"), 5);
$ar2 = array(10, "color" => array("favorite" => "green", "blue"));
$result = array_merge_recursive($ar1, $ar2);
print_r($result);
?>The output shows that the color key now holds an array with both favorite values (“red” and “green”) and the additional blue entry, while numeric values are appended.
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