problem of while loop and array - php

Question

$result=array();
$table_first = 'recipe';
$query = "SELECT * FROM $table_first";
$resouter = mysql_query($query, $conn);
while ($recipe = mysql_fetch_assoc($resouter, MYSQL_ASSOC)){
$result['recipe']=$recipe;
$query2="SELECT ingredients.ingredient_id,ingredients.ingredient_name,ingredients.ammount FROM ingredients where rec_id = ".$recipe['rec_id'];
$result2 = mysql_query($query2, $conn);
while($ingredient = mysql_fetch_assoc($result2)){
$result['ingredient'] = $ingredient;
}
echo json_encode($result);
}
this code show me all the recipes but only the last ingredients i.e
{"recipe":{"rec_id":"14","name":"Spaghetti with Crab and Arugula","overview":"http:\/\/www","category":"","time":"2010-11-11 14:35:11","image":"localhost\/pics\/SpaghettiWithCrabAndArugula.jpg"},"ingredient":{"ingredient_id":"55","ingredient_name":"test","ammount":"2 kg"}}{"recipe":{"rec_id":"15","name":"stew recipe ","overview":"http:\/\/www","category":"","time":"2010-11-11 14:42:09","image":"localhost\/pics\/stew2.jpg"},"ingredient":{"ingredient_id":"25","ingredient_name":"3 parsnips cut into cubes","ammount":"11"}}
i want to output all the ingredient records relevant to recipe id 14 and this just print the last ingredient.

Answer 1

$result['ingredient'] = $ingredient;
Is replacing the variable $result['ingredient'] with the most recent $ingredient value each time, culminating with the last value returned, you should use:
$result['ingredient'][] = $ingredient;
To incrememnt/create a new value within the $result['ingredient'] array for each $ingredient. You can then output this array according to your needs. Using print_r($result['ingredient']) will show you its content...to see for yourself try:
while($ingredient = mysql_fetch_assoc($result2)){
$result['ingredient'][] = $ingredient;
}
print_r($result['ingredient']);

Answer 2

If I understand correctly what you want to do, there is a way to optimize the code a lot, by fetching recipes and ingredients in one single query using a JOIN :
$recipes = array();
$recipe_ingredients = array();
$query = "SELECT * FROM recipe LEFT JOIN ingredients ON ingredients.rec_id=recipe.rec_id ORDER BY recipe.rec_id DESC";
$resouter = mysql_query($query, $conn);
$buffer_rec_id = 0;
$buffer_rec_name = "";
$buffer_rec_cat = "";
while( $recipe = mysql_fetch_array($resouter) )
{
if( $buffer_rec_id != $result['recipe.rec_id'] )
{
$recipes[] = array( $buffer_rec_id, $buffer_rec_name, $buffer_rec_cat, $recipe_ingredients);
$recipe_ingredients = array( );
$buffer_rec_id = $result['recipe.rec_id'];
$buffer_rec_name = $result['recipe.rec_name'];
$buffer_rec_cat = $result['recipe.rec_category'];
}
else
{
$recipe_ingredients[] = array( $result['ingredient_id'], $result['ingredient_name'], $result['ammount'] );
}
}
$print_r($recipes);
This code should give you a multi-dimensional array that you can use later to get the data you want.
I let you adapt the code to have exactly the information you need.