title: php SELECT where row value contains string
body: <p>I have a string has item_id from $_GET request</p>
  
  <p>Example</p>
  
  <pre><code>item_id = 12;
  </code></pre>
  
  <p>In MySQL, in the topping table I have a row with not integer value like so:</p>
  
  <p><code>item_id = "4, 8, 12, 92, ..."</code> which is hold many items </p>
  
  <p>I want to show all toppings belongs to this item_id </p>
  
  <p>I use this query:</p>
  
  <pre><code>mysql_query("SELECT * FROM topping WHERE item_id LIKE "%$item_id%")
  </code></pre>
  
  <p>but it seems not work 100%</p>
  
  <p>I need some thing Like:</p>
  
  <pre><code>mysql_query("SELECT * FROM topping WHERE '$item_id' IN item_id ");
  </code></pre>
  
  <p>I know the last query will not work, but I type it to clear my question</p>
  
  <p>any idea, please
  Thanks</p>