I have the following code wherein I'm trying to get values of the xml element 'point' from an RSS feed using PHP. When I display the value of point using 'echo', it gives me the correct data. However, when I pass the same parameter to a javascript function, it calls the function very randomly. The alert in the javascript function gives me the sum of the points of either 2 or 3 point values from each iteration. How do I resolve this problem?
<!DOCTYPE html>
<html>
<head>
<title>Natural Disasters</title>
<script type="text/javascript" src="http://maps.google.com/maps/api/js? sensor=false&libraries=places"></script>
<script type="text/javascript">
var i=0;
function getPoint(point) {
alert("Value of i : "+i+" Value of point : "+point);
++i;
}
</script>
<script>
function showRSS(str) {
if (str.length === 0) {
document.getElementById("rssOutput").innerHTML = "";
return;
}
if (window.XMLHttpRequest) {
// code for IE7+, Firefox, Chrome, Opera, Safari
xmlhttp = new XMLHttpRequest();
} else { // code for IE6, IE5
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
}
xmlhttp.onreadystatechange = function () {
if (xmlhttp.readyState === 4 && xmlhttp.status === 200) {
document.getElementById("rssOutput").innerHTML = xmlhttp.responseText;
}
};
xmlhttp.open("GET", "getrss.php?q=" + str, true);
xmlhttp.send();
}
</script>
</head>
<body>
<?php
$xml2 = ("http://www.volcano.si.edu/news/WeeklyVolcanoRSS.xml?");
$xmlDoc2 = new DOMDocument();
$xmlDoc2->load($xml2);
$x2 = $xmlDoc2->getElementsByTagName('item');
$i2 = 0;
foreach ($x2 as $y) {
$geo_rss = $y->getElementsByTagNameNS("http://www.georss.org/georss", 'point');
$title = $y->getElementsByTagName('title')->item(0)->nodeValue;
$point = $geo_rss->item(0)->nodeValue;
echo ("<h3>" . $title . "</h3>" );
echo ($point);
echo '<script type="text/javascript">'
, 'getPoint(' . $point . ');'
, '</script>'
;
++$i2;
}
?>
</body>
</html>
PS :I have followed the same procedure for another set of parameters, and it works perfectly fine. I do not know why this one is not working.
Change your php code to write script as below :
echo '<script type="text/javascript"> getPoint("' . $point . '");</script>';
You just need to wrap $point into double quotes.
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