如何查找和删除json数组上的重复项

Question

How can i find and delete the duplicates on

[{"id":"1","name":"raj"},{"id":"2","name":"antony"},{"id":"1","name":"raj"}]

Here How can i replace the duplicate entry i.e., {"id":"1","name":"raj"}

So, my output should be

[{"id":"1","name":"raj"},{"id":"2","name":"antony"}]

Answer 1

This how you can do it

$j = '[{"id":"1","name":"raj"},{"id":"2","name":"antony"},{"id":"1","name":"raj"}]';
$ar = json_decode($j,true);
$unique = array_map("unserialize", array_unique(array_map("serialize", $ar)));
echo json_encode($unique);

Result you will get as

[{"id":"1","name":"raj"},{"id":"2","name":"antony"}]