strtolower() on an array

Question

Using strtolower() on an array, is there a way to make the output below lower case?

<?=$rdata['batch_id']?> strtolower($rdata['batch_id']) 

Answer 1

The correct function name is strtolower(). If you want to apply this on each element of the array, you can use array_map():

$array = array('ONE', 'TWO'); $array = array_map('strtolower', $array); 

Now your array will contain 'one' and 'two'.

Answer 2

If you have a bunch of arrays with key-value pairs and you want to change the keys to lower case only, then this is your solution:

$lower_array_keys = array_change_key_case($array, CASE_LOWER); 

Take a look at array_change_key_case.