php - How to use implode? -


i have php code 

<?php if(!empty($_post['invite'])) { foreach($_post['invite'] $check) {    echo implode($_post['invite'], ',');   } }

result is: sky,earth,universesky,earth,universe

here result showing 2 times see after universe sky agian repeat, want show result one.

have idea?

just echo implode($_post['invite'], ','); no need use loop


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