jQuery get json_encode variable from PHP

Question

My PHP file retrieves data from a PostgreSQL DB. I have to send them back to my jQuery function in two different arrays. One is passed by using:

echo json_encode($tb);

and works fine, in my js file i get data correctly by using:

 $.ajax({
    type: "POST",
    url: './DB/lb.php',
    data: {d_p: oa},
    success: function (tb) {
      console.log(tb);
})

console output is as expected.

The other is always a PHP array, but I have to replace chars:

str_replace(array('[', ']'), '', htmlspecialchars(json_encode($ltb), ENT_NOQUOTES));

but if I write:

 $.ajax({
    type: "POST",
    url: './DB/lb.php',
    data: {d_p: oa},
    success: function (tb, ltb) {
      console.log(tb);
      console.log(ltb);
})

console.log(ltb) simply outputs

success

what I'm I getting wrong?

Answer 1

The second parameter of succes is the response staus. This is the reason because you get success when logging tlb .

You can only return one JSON at at time, so combine them:

echo json_encode(array("other stuff", "tb" => $tb, "tbl" => array("some" => "data")));

On JS side you can simple acces them by index or key:

tb[0];  // "other stuff"
tb.tb;  // content of $tb variable
tb.tbl; // {some: "data"}

Answer 2

The final working code:

PHP:

$tb = array();
$ltb = array();
    while ($row = pg_fetch_array($result, NULL, PGSQL_ASSOC))
    {
      array_push($ltb, $row["x"], $row["y"]); 
      array_push($tb, $row["z"],$row["t"]);
    } 

    echo json_encode(array('tb'=>$tb,'ltb'=>$ltb));

JS

$.ajax({
    type: "POST",
    url: './DB/lb.php',
    dataType: 'json', // this is what I forgot!!!
    data: {d_p: oa}, // passes variable for PHP function
success: function (response) {
        console.log(response.tb+" "+ response.ltb);
$.each(response.tb, function( i, item ) {
  // iterate over tb array
}
$.each(response.ltb, function( i, item ) {
  // iterate over ltb array
}
});