Insert data into SQL Server in PHP - php

Question

From a form (HTML), I send via AJAX a flag to indicate the action and a object that contains the information to save in PHP.
In the HTML file:
function Mandar_DATOS(QueHacer,OBJEvento){
// alert (OBJEvento.IdPaciente);
$.ajax({
type:'POST',
url:'./php/eventos.php?QueHacer='+QueHacer,
data:OBJEvento,success:function(msg){
if(msg){
.//mostrar en pantalla la informacion
}
},error:function(){
alert("No se guardo...");
}
});
}
in the PHP file (eventos.php)
$la_conexion = Conexion::ObtenConexion();
$QueHacer=(isset($_GET['QueHacer']))?$_GET['QueHacer']:'LEER';
switch ($QueHacer){
case 'GUARDAR':
$CadenaSQL=$la_conexion->prepare("INSERT INTO "
. "AgendaVideo(id, IdPaciente, IdMedico, title, start, end, color, textColor) "
. "VALUES(:id, :IdPaciente, :IdMedico, :title, :start, :end, :color, :textColor)");
$RESULTADO=$CadenaSQL->execute(array(
"id"=>$_POST['id'],
"IdPaciente"=>$_POST['IdPaciente'],
"IdMedico"=>$_POST['IdMedico'],
"title"=>$_POST['title'],
"start"=>$_POST['start'],
"end"=>$_POST['end'],
"color"=>$_POST['color'],
"textColor"=>$_POST['textColor']
));
echo json_encode($RESULTADO);
break;
case....
this code only returns false, but does not mark any error

Answer 1

If you want to return an error you need to call a method/function to output the error. Here below between the comments I'm using https://www.php.net/manual/en/pdo.errorinfo.php which just returns the error related to the last sql statement that has been run
$la_conexion = Conexion::ObtenConexion();
$QueHacer=(isset($_GET['QueHacer']))?$_GET['QueHacer']:'LEER';
switch ($QueHacer){
case 'GUARDAR':
$CadenaSQL=$la_conexion->prepare("INSERT INTO "
. "AgendaVideo(id, IdPaciente, IdMedico, title, start, end, color, textColor) "
. "VALUES(:id, :IdPaciente, :IdMedico, :title, :start, :end, :color, :textColor)");
//start error handling code
if (!$CadenaSQL) {
echo "\nPDO::errorInfo():\n";
print_r($la_conexion->errorInfo());
}
//end error handling code
$RESULTADO=$CadenaSQL->execute(array(
"id"=>$_POST['id'],
"IdPaciente"=>$_POST['IdPaciente'],
"IdMedico"=>$_POST['IdMedico'],
"title"=>$_POST['title'],
"start"=>$_POST['start'],
"end"=>$_POST['end'],
"color"=>$_POST['color'],
"textColor"=>$_POST['textColor']
));
//start error handling code
if (!$RESULTADO) {
echo "\nPDO::errorInfo():\n";
print_r($la_conexion->errorInfo());
}
//end error handling code
echo json_encode($RESULTADO);
break;
case....