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If you want to remove duplicate items from an array in PHP

you can do it with the command array_unique

$array_with_duplicate_entries = array(1, 2, 2, 3, 4, 4, 5, 6, 7, 8, 9, 10);

$array_with_no_duplicate_entries = array_unique($array_with_duplicate_entries);

The content of the array with removed entries will be

$array_with_no_duplicate_entries = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);

Note that the indexes are preserved during the removal of the duplicate entries