所以我创建了一个网站，允许用户查看从3个下拉菜单中选择的食材的配方：肉类，水果和蔬菜和碳水化合物。一旦用户从上面的下拉菜单中选择了3种成分，就应该显示一个配方页面，其中包含适合这些选择的配方。
我到目前为止所有工作：数据库，用户选择和显示配方。虽然我想为某些食材添加多种配方，例如如果用户选择了碎肉，西红柿和意大利面，我怎样才能展示意大利肉酱和烤宽面条？ - 我需要一个循环来创建这个但不确定如何。非常感谢任何帮助。
到目前为止代码：
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<title>Economic Eating</title>
<!-- Bootstrap Core CSS -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- Custom CSS -->
<link href="css/modern-business.css" rel="stylesheet">
<!-- Custom Fonts -->
<link href="font-awesome/css/font-awesome.min.css" rel="stylesheet" type="text/css">
<body>
<!-- Navigation -->
<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div class="container">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a href="index.php" class="pull-left"> <img src="images/logo1.jpg"></a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
<li><a href="favouriteRecipes.html">Favourite Recipes</a>
</li>
<li>
<a href="addRecipe.php">Add Recipe</a>
</li>
</ul>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container -->
</nav>
<!-- Page Content -->
<div class="container">
<!-- Page Heading/Breadcrumbs -->
<div class="row">
<div class="col-lg-12">
<br><br>
require 'dbConnect.php';
$meat = $_POST['ingred1'];
$fruitveg = $_POST['ingred2'];
$carbs = $_POST['ingred3'];
$ingredientsQuery = $db->prepare("SELECT recipe.id AS temp, ingredients, meat_qty, fruitveg_qty, carbs_qty, FROM meat, fruitveg, carbs, ingredients, recipe WHERE recipe.id = ingredients.recipe_id and meat.ingredName = '$meat' and meat.meat_id = recipe.meat_id and fruitveg.fruitvegName = '$fruitveg' and fruitveg.fruitveg_id = recipe.fruitveg_id and carbs.carbName = '$carbs' and carbs.carbs_id = recipe.carbs_id");
$ingredientsQuery->execute();
$recipeNameQuery = $db->prepare("SELECT recipeName
FROM meat, fruitveg, carbs, recipe
WHERE meat.ingredName = '$meat' and meat.meat_id = recipe.meat_id and
fruitveg.fruitvegName = '$fruitveg' and fruitveg.fruitveg_id = recipe.fruitveg_id and
carbs.carbName = '$carbs' and carbs.carbs_id = recipe.carbs_id");
$recipeNameQuery->execute();
$recipeQuery = $db->prepare("SELECT ingredName, fruitvegName, carbName, recipeName
FROM meat, fruitveg, carbs, recipe
WHERE meat.ingredName = '$meat' and meat.meat_id = recipe.meat_id and
fruitveg.fruitvegName = '$fruitveg' and fruitveg.fruitveg_id = recipe.fruitveg_id and
carbs.carbName = '$carbs' and carbs.carbs_id = recipe.carbs_id");
$recipeQuery->execute();
$instructionQuery = $db->prepare("SELECT instruction
FROM meat, fruitveg, carbs, instruction, recipe
WHERE recipe.id = instruction.recipe_id and
meat.ingredName = '$meat' and meat.meat_id = recipe.meat_id and
fruitveg.fruitvegName = '$fruitveg' and fruitveg.fruitveg_id = recipe.fruitveg_id and
carbs.carbName = '$carbs' and carbs.carbs_id = recipe.carbs_id");
$instructionQuery->execute();
$photoQuery = $db->prepare("SELECT photo, ingredName, fruitvegName, carbName
FROM meat, fruitveg, carbs, recipe
WHERE meat.ingredName = '$meat' and meat.meat_id = recipe.meat_id and
fruitveg.fruitvegName = '$fruitveg' and fruitveg.fruitveg_id = recipe.fruitveg_id and
carbs.carbName = '$carbs' and carbs.carbs_id = recipe.carbs_id");
$photoQuery->execute();
while ($meat = $_POST['ingred1'] && $fruitveg = $_POST['ingred2'] && $carbs = $_POST['ingred3']) {
if ($recipeName = $recipeNameQuery->fetch(PDO::FETCH_ASSOC))
{?>
<h3><b><?php echo $recipeName['recipeName'];} ?></b></h3><br>
<ol class="breadcrumb">
<li><a href="index.php">Home</a></li>
<li><a href="favouriteRecipes.html">Back to Favourite Recipes</a></li>
</ol>
</div>
</div>
<!-- /.row -->
<!-- Portfolio Item Row -->
<div class="row">
<div class="col-md-8">
<div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
<!-- Wrapper for slides -->
<div class="carousel-inner">
<div class="item active"><br>
<img class="img-responsive" src="<?php
if ($photo = $photoQuery->fetch(PDO::FETCH_ASSOC)){
echo $photo['photo'];}?>" alt="">
</div>
</div>
</div>
</div>
<div class="col-md-4">
<h3><u>Recipe Ingredients</u></h3>
<ul>
<option value="<?php echo $ingredients['id'];?>"></option>
<li><b><?php echo $_POST["ingred1"]; ?></li>
<li><?php echo $_POST["ingred2"]; ?></li>
<li><?php echo $_POST["ingred3"]; ?></li></b>
<?php
while ($ingredients = $ingredientsQuery->fetch(PDO::FETCH_ASSOC)) {?>
<?php if ($ingredients['temp'] == ['ingredients.recipe_id']){?>
<li><?php echo $ingredients['temp'];
echo $ingredients['ingredients']; ?></li><?php } }?>
</ul>
</div>
</div>
<!-- /.row -->
<!-- Related Projects Row -->
<div class="row">
<div class="col-lg-12">
<h3 class="page-header">Instructions</h3>
<?php
while ($instruction = $instructionQuery->fetch(PDO::FETCH_ASSOC)) {
?>
<ul style="list-style-type:square"><li> <?php echo $instruction['instruction']; ?><br><br></li></ul>
<?php }
} ?>
</div>
</div>