phparrays

Check if a key exists and get a corresponding value from an array in PHP

How can I check if a key exists? If yes, then how do I get the value of this key from an array in PHP?

E.g., I have this array:

$things = array(
  'AA' => 'American history',
  'AB' => 'American cooking'
);

$key_to_check = 'AB';

Now, I need to check if $key_to_check exists and if it does, get a corresponding value, which in this case will be American cooking.

Solution 
  • if(isset($things[$key_to_check])){
    echo $things[$key_to_check];
}