How to search Array for multiple values in PHP?

Question

I need to get the keys from values that are duplicates. I tried to use array_search and that worked fine, BUT I only got the first value as a hit.

I need to get both

Answer 1

The PHP manual states in the Return Value section of the array_search() function documentation that you can use array_keys() to accomplish this. You just need to provide the second parameter:

$keys = array_keys($list[0], "2009-09-09");