please help to Complete the program by adding a PHP function named wordDigit() that takes in one argument $word

The first statement in the function should convert the argument string to an array. hint: explode()

The next statement should declare and initialize the $result variable with an empty string

Then in a foreach() loop use a switch() (you may want to trim() the input) with 10 cases to determine what word needs to be converted to its corresponding digit and then append the result to the $result variable

Echo out the $word variable followed by an HTML line break tag.

Then return the $result

here is what I got so far

//add your wordDigit() function here

?>

Explode!

Enter one or more number names with a dash between each

Output: