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POI can't delete fields in a mysql database
 

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  1. POI can't delete fields in a mysql database
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    <p>I need to delete to generate a form to select in checkboxes which users I want to delete from the database. To search the users and generate the form I use this code:</p> <pre><code>&lt;?php $con = new mysqli('localhost', 'root', '', 'prueba'); $busqueda =""; $busqueda=$_POST['busqueda'] ; // funcion para convertir el contenido de un array en un string function makestring($array) { $outval = ''; if (is_array($array)) { foreach($array as $key=&gt;$value) { if(is_array($value)) { $outval = makestring($value); } else { $outval = $value; } } } return $outval; } if ($busqueda!=""){ $busca = mysqli_query($con, " SELECT usuario FROM usuarios WHERE usuario LIKE '%$busqueda%'"); echo "&lt;form action='borrar.php' method='post' enctype='multipart/form-data'&gt;"; while ($array= mysqli_fetch_array($busca)){ $user=makestring($array); echo"Usuario: &lt;input type='checkbox' name='borrar_usuario[]' value='$user' /&gt;$user&lt;br/&gt;"; } echo " &lt;input type='submit' name='boton' value='eliminar' /&gt;"; echo "&lt;/form&gt;"; } $all =$_POST['todos'] ; if ($all=='borrar_todos'){ $busca = mysqli_query($con, "select usuario from usuarios "); echo "&lt;form action='borrar.php' method='post' enctype='multipart/form-data'&gt;"; while ($f = mysqli_fetch_array($busca)){ $user=makestring($f); echo "Usuario: &lt;input type='checkbox' name='borrar_usuario[]' value='$user' /&gt;$user&lt;br/&gt;"; } echo " &lt;input type='submit' name='boton' value='eliminar' /&gt;"; echo "&lt;/form&gt;"; } ?&gt; </code></pre> <p>I use this code to collect the data from the forms with this code:</p> <pre><code>&lt;?php $con = new mysqli('localhost', 'root', '', 'prueba'); if(isset($_REQUEST["borrar_usuario"])) { $del_user = $_POST["borrar_usuario"]; $mensaje = "¿Está seguro que quiere eliminar el usuario &lt;b&gt;$row[usuarioNombre]&lt;/b&gt;?"; } // mostramos el mensage echo $mensaje; mysqli_query($con, "delete usuario, password, descripcion from usuarios where usuario in like '$del_user'"); echo "usuario borrado"; header('refresh: 3; url= exito.php'); ?&gt; </code></pre> <p>But it doesn't delete anything in the database. Any help please?</p>
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    1. USGonzalo Mejías Moreno
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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    2. PO
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    1. COYou can't use `DELETE` to erase _fields_ in a database, `DELETE` will only delete entire _rows_.
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      1. POI can't delete fields in a mysql database
      1. USJoachim Isaksson
 

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