gistfile1.php

<?php
$recipes = array(
    array(
        'id'=> 1,
        'title'=>'Cookies1',
        'description'=>'Delicious1, crisp on the outside, chewy 1',
        'ingredients'=> array(
            'amount'=> '1',
            'amountUnits'=> 'packet',
            'ingredientName'=> 'Chips Ahoy'
         ),
        'instructions'=> '1.1 Go buy a packet of Chips Ahoy'
    ),
    array(
        'id'=> 2,
        'title'=>'Cookies2',
        'description'=>'Delicious2, crisp on the outside, chewy 1',
        'ingredients'=> array(
            'amount'=> '1',
            'amountUnits'=> 'packet',
            'ingredientName'=> 'Chips Ahoy'
         ),
        'instructions'=> '2.1 Go buy a packet of Chips Ahoy'
    ),
    array(
        'id'=> 3,
        'title'=>'Cookies3',
        'description'=>'Delicious1, crisp on the outside, chewy 1',
        'ingredients'=> array(
            'amount'=> '1',
            'amountUnits'=> 'packet',
            'ingredientName'=> 'Chips Ahoy'
         ),
        'instructions'=> '3.1 Go buy a packet of Chips Ahoy'
    ),
);
if(isset($_GET['id'])){
  foreach($recipes as $recipe){
      if($recipe['id'] == $_GET['id']){
          $recipes = array($recipe);
          break;
      }
  }  
}
echo  json_encode($recipes);