What potential errors can occur when using the array_unique function in PHP, and how can they be resolved?

When using the array_unique function in PHP, one potential error that can occur is the loss of array keys. This function only removes duplicate values, not duplicate keys, so if the original array had keys associated with the values, they may be reset or re-indexed. To resolve this issue, you can use the array_values function to re-index the array after calling array_unique. 

// Original array with duplicate values
$array = array("a" => "red", "b" => "green", "c" => "red", "d" => "blue");

// Remove duplicate values and re-index the array
$uniqueArray = array_values(array_unique($array));
print_r($uniqueArray);

Keywords

array_unique PHP errors resolution duplicates

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