Invalid argument provided for foreach

Question

I created a foreach to traverse a array which has 2 element but I wanted my foreach to get only the first element, I tried to use the [0] but my return was that mistake:

ERROR:

arning: Invalid argument supplied for foreach() in C:\Apache2\htdocs\teste.php on line 44

My code:

foreach($lista_quantidade[0] as $quantidade_unidade){
       $quantidade_unidade = intval($quantidade_unidade);
       $quantidade_unida_diferen = $quantidade - $quantidade_unidade;
       echo "Diferença de quantidade: $quantidade_unida_diferen" . "<br>";
      }

Answer 1

If you want to take the [0] element of your array, why do you need to go through it? You don’t need a foreach to have that value.