Passing Jquery value to PHP Script

bookings-dialog.php should not display HTML elements, it should return JSON encoded string.

add your result, and another for error, then you can handle error from jQuery

eg:

<?php    require_once('deployment.php');    require_once('bootstrp/all.inc.php');;    require_once('models/sql.php');    require_once('models/bookingdocket.php');    $pdo = new SQL();    $dbh = $pdo->connect(Database::$serverIP, Database::$serverPort, Database::$dbName, Database::$user, Database::$pass);    try {        $rowdata = $_POST['rowdata'];        $query = ("SELECT * FROM tblbookings WHERE bookref = :bookref");        $stmt = $dbh->prepare($query);        $stmt->execute(array(':bookref' => $_POST['rowdata']));        $row = $stmt->fetch(PDO::FETCH_BOTH);        BookingDocket::set_bookref($row['bookref']);        echo json_encode( array('bookref' => $row['bookref'], 'date' => $row['bookingdate'], 'error' => 'no') );        $stmt->closeCursor();    }    catch (PDOException $pe) {        die(json_encode(array("error" => "Error: " .$pe->getMessage(). " Query: ".$stmt->queryString)));    }    $dbh = null;?>

also in your getGridRow check for error field:

success: function(data){    if(typeof console != "undefined"){ console.log(data); } // this will prompt data in console    if(data.error == 'no'){        alert("IT WORKED!");        $('.cp-booking-info').empty();        $('#cp-bookings-dialog').append('<p class="pno-margin">Booking Date: '+data.date+'</p>');        $("#cp-bookings-dialog").dialog({            show: { effect: 'drop', direction: "up" },            hide: 'slide',            height: 625,            width: 733,            title: 'Booking Reference: - '+ data.bookref        });    } else {        alert(data.error);    }}

I think the only thing to change is to replace :

title: 'Booking Reference: - '+ brData

By :

title: 'Booking Reference: - '+ data.bookref

brData looks undefined in the success callback

If you're asking for a JSON string, php should return that exact type. Javscript is waiting for the application/json content type.

So in php you need to add some header code:

require_once('deployment.php');require_once('bootstrp/all.inc.php');require_once('models/sql.php');require_once('models/bookingdocket.php');header('Content-Type: application/json');$pdo = new SQL();$dbh = $pdo->connect(Database::$serverIP, Database::$serverPort, Database::$dbName, Database::$user, Database::$pass);try {       $rowdata = $_POST['rowdata'];       $query = ("SELECT * FROM tblbookings WHERE bookref = '$rowdata'");       $stmt = $dbh->prepare($query);       $stmt->execute();       $row = $stmt->fetch(PDO::FETCH_BOTH);      /* BookingDocket::set_id($row['id']); */       BookingDocket::set_bookref($row['bookref']);      /* BookingDocket::set_bookdate($row['bookingdate']);       BookingDocket::set_returndate($row['returndate']);       BookingDocket::set_journeytype($row['journeytype']);       BookingDocket::set_passtel($row['passengertel']);       BookingDocket::set_returndate($row['returndate']); */       $booking_ref = BookingDocket::get_bookref();       echo json_encode(array('bookref' => $booking_ref));       $stmt->closeCursor();}catch (PDOException $pe){    echo json_encode(array("Error: " .$pe->getMessage(). " Query: ".$stmt->queryString));}finally{    $dbh = null;}