Errno(0) when failing to insert with prepared statement - php

Question

I am having an error when inserting data into a table with php using prepared statements, I am stuck cuz it gives me errno(0), I dont know what that error is, can you help me please?. Thanks!
<?php
session_start();
include '../conexion.php';
$nombre = $_POST['Nombre'];
$apellido = $_POST['Apellido'];
$mail = $_POST['Mail'];
$telefono = $_POST['Telefono'];
$ultimaventa = $_POST['Numeroventa'];
$totalcomprado = 0;
$ultimomonto = $_POST['Total'];
if($cons = $mysqli->prepare("select 1 from clientes WHERE Mail=?"));
$cons->bind_param('s',$mail);
$cons->execute();
$cons->store_result();
$existe=$cons->num_rows > 0;
if ($existe) {
$totalcomprado=totalcomprado+$ultimomonto;
if(!($cons=$mysqli->prepare("UPDATE clientes SET nombre=?,apellido=?,Mail=?,telefono=?,ultimaventa=?,ultimomonto=?,totalcomprado= ? WHERE Mail=?"))){
echo "fallo en la preparacion de la consulta:(".$mysqli->errno.")" .$mysqli->error;
}
$cons->bind_param('sssssiis',$nombre,$apellido,$mail,$telefono,$ultimaventa,$totalcomprado,$mail);
if(!($cons->execute())){
echo "fallo ejecutando la consulta:(".$mysqli->errno.")" .$mysqli->error;
}
$cons->close;
} else {
$totalcomprado=$ultimomonto;
if(!($cons=$mysqli->prepare("INSERT into clientes id,nombre,apellido,Mail,telefono,ultimaventa,ultimomonto,totalcomprado values(?,?,?,?,?,?,?)"))){
echo "fallo en la preparacion de la consulta:(".$mysqli->errno.")" .$mysqli->error;
}
$cons->bind_param('sssssis',$nombre,$apellido,$mail,$telefono,$ultimaventa,$totalcomprado);
if(!($cons->execute())){
echo "fallo ejecutando la consulta:(".$mysqli->errno.")" .$mysqli->error;
}
}
Ps.: The data types to insert are ok, the only one Integer is "ultimomonto"
This is the error:
fallo en la preparacion de la consulta:(0)
( ! ) Fatal error: Call to a member function bind_param() on a non-object in C:\wamp\www\mumushop\compras\verificar.php on line 35

Answer 1

You're missing the parentheses arount the column names in the INSERT statement:
if(!($cons=$mysqli->prepare("INSERT into clientes (id,nombre,apellido,Mail,telefono,ultimaventa,ultimomonto,totalcomprado) values(?,?,?,?,?,?,?)"))){
There's another problem that isn't related to the error:
if($cons = $mysqli->prepare("select 1 from clientes WHERE Mail=?"));
The ; ends this if statement, so you're not using it to execute anything based on whether this is successful. I think you want all the rest of the code to be inside this, so it should be:
if($cons = $mysqli->prepare("select 1 from clientes WHERE Mail=?")) {
$cons->bind_param('s',$mail);
$cons->execute();
$cons->store_result();
$existe=$cons->num_rows > 0;
if ($existe) {
...
} else {
...
}
}
The undefined constant error is coming from this line:
$totalcomprado=totalcomprado+$ultimomonto;
You're missing the $ before totalcomprado, it should be:
$totalcomprado=$totalcomprado+$ultimomonto;
or you can write it as:
$totalcomprado += $ultimomonto;