How to get a string from external PHP file and set it as var in JavaScript
Question
I thought this would be simple enough, but I can't get it to work.
I have two files. main.html and data.php The two files are in the same folder on a server.
I want to get a string from the PHP file and use it in jQuery. In the example below, I want the browser to create a pop-up, with the text "xxxx". I get no pop-up.
data.php
<?php
$var = "xxxx";
echo json_encode($var);
?>
main.html
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="scripts/jquery-1.11.1.js"></script>
<script>
$(document).ready(function() {
var testString = <?php $var = json_decode(file_get_contents('data.php'), true); echo $var; ?>;
alert(testString);
});
</script>
</head>
<body>
<h1>Test</h1>
</body>
</html>
Any takers?
3 answers
solution1
2 ACCPTED 2014-10-31 05:31:43
<!DOCTYPE html>
<html>
<head>
<script>
$(document).ready(function() {
$.ajax({
url:"data.php",
success:function(result){
alert(result);
}
});
});
</script>
</head>
<body>
<h1>Test</h1>
</body>
</html>
solution2
1 2014-10-31 05:36:39
The first problem with this is that on many servers .html is not parsed for PHP
The second problem is that the file_get_contents will actually display the full contents of your .php file (including the <?php ) which is likely not what you're looking for.
Instead I would use an AJAX request such as http://api.jquery.com/jquery.get/
For this you will need to include jQuery in your <head>
solution3
0 2014-10-31 06:02:41
You should get the php data before html initiates, like below
<?php
$var = json_decode(file_get_contents('data.php'), true);
?>
<!DOCTYPE html>
<html>
<head>
<script>
$(document).ready(function() {
var testString = <?php echo $var; ?>;
alert(testString);
});
</script>
</head>
<body>
<h1>Test</h1>
</body>
</html>
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