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Jhonatan Valencia's questions

Martin Hope
Jhonatan Valencia
Asked: 2020-04-05 13:59:17 +0800 CST
  • 1

what happens to me is that I have to work on a project that is in laravel4.2 and my xammp has php 7.2.3 and when I try to run the project I get the error Mcrypt PHP extension required. I have tried to change the version of Xammp but the error persists

xampp
Martin Hope
Jhonatan Valencia
Asked: 2020-10-11 10:41:44 +0800 CST
  • 0

well what happens is that I have a problem to consult a table, I have the typical products and category table where id_categoria the attribute that relates the tables would be

  1. what I can't do is bring me EVERYTHING from the products table

I don't know if it's because the tables are related

SELECT  *  FROM productos

and it doesn't work for me

I try to do the selectwithout the attribute id_categoriaand it works but I need the query with that value

Thank you very much for your help

sql
Martin Hope
Jhonatan Valencia
Asked: 2020-04-25 19:46:59 +0800 CST
  • 1

Hi, I'm new to programming. I'm trying to do the basic operations using a radio button, but addition and subtraction don't work for me. I don't understand why.

<form method="POST" action="resultado.php">
  <table>
    <tr>
      <th>Numreo 1</th>
      <td>
        <input type="text" name="n1"></input>
      </td>
    </tr>
    <tr>
      <th>Numero 2</th>
      <td>
        <input type="text" name="n2"></input>
      </td>
    </tr>
    <tr>
      <td>
        <input type="radio" name="operacion" value="suma">Suma</input>
        <input type="radio" name="operacion" value="resta">Resta</input>
        <input type="radio" name="operacion" value="producto">Multiplicacion</input>
      </td>
      <td>
        <input type="radio" name="operacion" value="division">Division</input>
        <input type="radio" name="operacion" value="potencia">Potencia</input>
        <input type="radio" name="operacion" value="modulo">Modulo</input>
      </td>
    </tr>
    <tr>
      <td></td>
      <td>
        <input type="submit" name="enviar" value="ENVIAR"></input>
      </td>
    </tr>
  </table>
</form>
//otra pagina
<?php 
		$n1 = $_POST['n1'];

		$n2 = $_POST['n2'];


		switch ($_POST['operacion']) {
			case 'suma':
					echo "el resultado es ".$n1+$n2;		
				break;
			case 'resta':
					echo "el resultado es ".$n1-$n2;
				break;
			case 'producto':
					echo "el resultado es ".$n1*$n2;
					break;
			case 'division':
					echo "el resultado es ".$n1/$n2;
						break;
			case 'modulo':
					echo "el resultado es ".$n1%$n2;	
						break;
			case 'potencia':
					echo "el resultado es ".pow($n1, $n2);						
						break;								
			default:
				# code...
				break;
		}
		 ?>

php