Question

I have an array with terms and definitions>

$myArray = array("apple" => "Fruit that grows ...", "car" => "Vehicle on four...");  

How do I determine if I have words starting with a particular letter? Say, “c” for car?

I need to do this check with JS if possible, without reloading the page.

Answer 1

You have to iterate and check yourself:

foreach( $myArray as $key=>$val ) {
   if( $key[0] == 'c' ) {
     // bingo
   }
}