How to populate html texbox with mysql query? - php

Question

Im trying to populate the textboxes of a CRUD with the information obtained from a query. I use a stored procedure which already works.
I mainly want to give an ID, click search and populate the rest of the texboxes with the clients rest of information. The rest of the buttons already work so I think my problem is located in this section of code:
if(isset($_POST['btnBuscar']))
{
$opc = "buscar";
$idcliente = ($_POST['txtIdCliente']);
$nombre = ($_POST['txtNombre']);
$apaterno = ($_POST['txtApPat']);
$amaterno = ($_POST['txtApMat']);
$tel = ($_POST['txtTel']);
$email = ($_POST['txtEmail']);
$fecalta = ($_POST['txtFechaAlta']);
$query = "CALL sp_clientes('$opc',$idcliente,'$nombre','$apaterno','$amaterno',$tel,'$email','$fecalta')";
if(mysqli_query($con,$query)){
header("location:Clientes.php?searched=1");
this next part where I have doubts
($_POST['txtIdCliente']) = $reg['IdCliente'];
($_POST['txtNombre'])= $reg['Nombre'];
($_POST['txtApPat']) = $reg['APaterno'];
($_POST['txtApMat']) = $reg['ApMaterno'];
($_POST['txtTel']) = $reg['Telefono'];
($_POST['txtEmail']) = $reg['Email'];
($_POST['txtFechaAlta']) = $reg['FecAlta'];
}

Answer 1

Here is the example. you can achieve more by appending HTML in PHP
echo '<input type="text" style="background-color:blue" id="'.$_POST['txtNombre'].'" name="content'.$_POST['txtNombre'].'" value="'.$_POST['txtNombre'].'"></input>';