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Asked: 2026-05-13T07:20:46+00:00

i am calling a javascript for image gallery and php on a single page.

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i am calling a javascript for image gallery and php on a single page.
let me show you some code to make things clear:

PHP

echo "<form method = post action = 'user_submit.php'>";

// get possible answers using question ID
$query = "SELECT aid, atitle FROM answers WHERE qid = '$qid' ORDER BY aid ASC";
$result = mysql_query($query) or die("ERROR: $query.".mysql_error());

if (mysql_num_rows($result) > 0) {
while ($row = mysql_fetch_object($result)) {
echo "<div id=captionbox style='width: 110px;float:left;color:#FFF;text-align:center;'>";
echo "<a href='#' class='thumb' ><img class='thumb-img' src='images/roadies/th".$row->aid.".jpg' /> </a>";
echo "<input  type = hidden name = aid id = rd".$row->aid." value = ".$row->aid.">".$row->atitle."</input>";
        echo "</div>";
                    }

echo "<input type = hidden name = qid value = '".$qid."'>";
echo "<br/>";
echo "<input type = submit name = submit value = 'Vote!'>";
                }

  echo '</form>';

}

the above code fetches object ids and places jpeg images accordingly (thumbnails).
now when i click on these thumbnails the javascript opens an overlay to display the large version. i want to pass the value of $row->aid to javascript.

then from the javascript i want to fill out a form and pass the $row->aid and the form to user_submit.php to add it to the DB.

i am new to php. please help me out.

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1 Answer

  1. Editorial Team

    You can write a variable, object or array literal declaration to your javascipt file or to a <script> element in a HTML file, as kiamlaluno correctly said. but i would suggest, (1) use the var keyword and (2) consider using a separate namespace.

    If you have several things to tell the JS, it’s handy to put them in a PHP hash and json_encode() and then write the encoded string to your output. This takes care of the namespace and correct escaping of the data. For example:

    <?php
$jsdata = array(
    'this' => "It\"s gone.\nWhat?",
    'that' => array(1,3,2),
    'another' => 0x2f );
$jsdata = json_encode($jsdata);
?>
<html>
<head></head>
<body>
<script type="text/javascript">
    var thedata = <?php echo "$jsdata;" ?>
    window.console.log(thedata);
</script>
</body>
</html>

    Try that and look at the javascript console to see if it works.

    EDIT: Another reason I like this approach is because you can use PHP’s array handling conveniences to construct an arbitrarily complex $jsdata while not worrying about escaping issues and only consuming one global JS object name.

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