<?php
header("Content-type: application/javascript");
?>
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<?php
$variable=10;
?>
<script>
var myVar = "<?php echo $variable; ?>";
alert(myVar);
</script>
</body>
</html>
this is my source code and it is not working. My concern is converting the php variable as javascript variable..The alert displays the entire line as a string instead of printing the value...Have tried json function as well.No use.what should I be doing?
Remove this line:
header("Content-type: application/javascript");
This tells browser to output this page as text (i.e browser will not render it), JavaScript should be loaded into HTML files.
text/html instead.You should definitely not tell the browser that it's receiving JavaScript when it is in fact receiving HTML:
header("Content-type: text/html");
The fact that the HTML contains a <script> tag, which itself contains JavaScript is something entirely different.
Additionally, a much better way on injecting PHP variables in JavaScript is
var myVar = <?php echo json_encode($variable); ?>;
Note no quotes around the value -- json_encode quotes automatically as required. There are certain fine points about injecting variables that make both this one and your original approach not bulletproof, but json_encode is much better as a default choice.
echo is just an invitation to break.I guess your file has the .php extension. In this case, a simple <script>var myVar=<?php print $variable; ?></script> will do, no need to encase it in quotes or double quotes :P
