Error Sending multiple json messages - php

Question

I have an issue with json,
I have a function that send a json array
public function repondMessage($etat=true,$message)
{
$msg = array($etat,$message);
return '{"msg":'.json_encode($msg).'}';
}
and I get the Json array correctly when just one error sent
like this one:
if(a=1)
{
echo respondeMessage(false,'Error');
}
and jQuery:
console.log(data);
var resp = jQuery.parseJSON(data);
console.log(resp);
I Get the result which is fine for me:
{"msg":[false,"Error"]}
but when I get two messages at the same time , when I make a test like that
if(a=1)
{
echo respondeMessage(false,'Error');
}
if(b=1)
{
echo respondeMessage(false,'Error2');
}
this what happen : (I don't how to separete the two Json)
{"msg":[false,"Error"]}{"msg":[false,"Error2"]}
Uncaught SyntaxError: Unexpected token {

Answer 1

As per my comment, you cannot send multiple responses, instead add the responses to and array and send them all at once
public function respondMessage($message)
{
$msg = array('msg'=>$message);
//Always send the correct header
header('Content-Type: application/json');
echo json_encode($msg);
//and stop execution after sending the response - any further output is invalid
die();
}
$errors=[];
if($a=1)
{
$errors[]=[false=>'Error'];
}
if($b=1)
{
$errors[]=[false=>'Error2'];
}
if(!empty($errors){
respondMessage($errors);
}

Answer 2

By invoking your respond function you are responding multiple times. From your code, I believe the intent is to respond as follows:
{"msg":[false, "Error", "Error2"]}
If that is the case, my recommendation would be the following structure in your invoking context to provide those results:
$errors = [];
if($a=1){
$errors[] = 'Error';
}
if($b=1){
$errors[] = 'Error2';
}
if( count( $errors ) ){
respondMessage( true, $errors );
}