Error with Array getting Empty Set

Question

Updated Problem: print_r($_POST); in the php file outputs after I type something in the box.

Array
(
    [q] => running
)

print json_encode($jsonArray); however is printing []

The php which queries Interest table for the bound parameter

    $interestValue = $_POST['interestVal']; //////
    $dbh->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );  
    $sth = $dbh->prepare(
'SELECT interestID, interestVal FROM Interest WHERE interestVal = ?');
    $sth->bindParam(1, $interestValue);
    $sth->execute();
    $jsonArray = array();
    while ($result = $sth->fetch(PDO::FETCH_ASSOC)) {
     $jsonArray[] = array(
      'ID' => $result['interestID'], 
          'Value' => $result['interestVal']); 
    }

    print_r($_POST);

    print json_encode($jsonArray); // json encode that array

HTML

<input id="interest" name="interest" value="What are your interests?" />

JS

//Get interests
        $(document).ready(function() {
            $("input#interest").tokenInput("../../src/php/registration/interest/getInterest.php");
        });

The JS of the framework(http://loopj.com/jquery-tokeninput/)

(function ($) {
// Default settings
var DEFAULT_SETTINGS = {
    // Search settings
    method: "POST",
    contentType: "json",
    queryParam: "interestVal",
    searchDelay: 300,
    minChars: 1,
    propertyToSearch: "name",
    jsonContainer: null,

    // Display settings
    hintText: "Type in a search term",
    noResultsText: "No results",
    searchingText: "Searching...",
    deleteText: "&times;",
    animateDropdown: true,

    // Tokenization settings
    tokenLimit: null,
    tokenDelimiter: ",",
    preventDuplicates: false,

    // Output settings
    tokenValue: "name", // orig "id"
}

Why is this array empty??

I tried that too. The thing is though, when I type "running" into the input it calls the JS above and calls the php file. I dont see how it would output this value — CodeTalk
– CodeTalk, Commented Apr 13, 2012 at 1:31
I'm trying to set this up: loopj.com/jquery-tokeninput . I wonder if this is the reason "Your script must accept a GET parameter named q which will contain the term to search for" ?? — CodeTalk
– CodeTalk, Commented Apr 13, 2012 at 1:34

kitti · Accepted Answer · 2012-04-13 01:15:34Z

1

Don't use mysql_real_escape_string with prepared statements - binding parameters takes the user data out of the SQL code, so there are no SQL injection vulnerabilities. More importantly, mysql_real_escape_string only works AFTER you connect to the DB, not before, which is turning your value into false.

answered Apr 13, 2012 at 1:15

kitti

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7 Comments

CodeTalk Over a year ago

thanks for the reply. I remove mysql_real_escape_string. Now it just says "searching..." forever. I tried manually looking at the php script. Its still outputting json array var Array[] when I try to echo 'json array var '.$jsonArray; right after while{}

kitti Over a year ago

Then you should either set up xdebug, or start echoing values in your PHP. Also make sure to check your error logs.

kitti Over a year ago

You can't echo an array. Try print_r($jsonArray);

CodeTalk Over a year ago

Yeah. you can see the outputting I tried above. It printed out empty values for both variables. I also checked the catch{} block for this file and its blank

CodeTalk Over a year ago

Good catch @Ryan - it still is a blank array() though

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