<?php
include("conexion.php");
$idUsu=$_POST["id"];
$sql="SELECT Nombre FROM usuario where idUsuario=$idUsu";
$result=mysqli_query($conexion,$sql);
?>
and here the form where I want to show the name
<form >
<div class="form-row">
<div class="form-group col-md-6">
<label for="inputNombre">Nombre</label>
<input type="text" class="form-control" name="Nombre" value="$result">
what you must do is create an associative arrangement by means of a while and then open the php language with its respective <?php ?> tags within the form as follows:
<?php
include("conexion.php");
$idUsu=$_POST["id"];
$sql="SELECT Nombre FROM usuario where idUsuario=$idUsu";
$result=mysqli_query($conexion,$sql);
while ($res = mysqli_fetch_array($result)) {
}
?>
<label for="inputNombre">Nombre</label>
<input type="text" class="form-control" name="Nombre" value="<?php echo
$res['nombre']; ?>">