JS <---> PHP communication [closed]

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I need to, using JS get some val开发者_如何转开发ues returned by a PHP script.

How to achieve that?

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<script type="text/javascript">
var string = <?php echo $variable; ?>;
</script>

or AJAX

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AJAX: http://www.devirtuoso.com/2009/07/beginners-guide-to-using-ajax-with-jquery/

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You can create a js file with PHP.

For exemple

// My script php
var js_var = '<?php echo "toto"?>';

or use an AJAX framework and JSON

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What's the method you're using to communicate with PHP? If you're using AJAX you might want to checkout jQuery or a library of some sort and use JSON for communication.

Using these methods, like using getJSON, you can easily access the variables returned by the PHP-script.

Please provide some more details to your question so we can answer your question in more detail and provide some examples.

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You can assign php values to JavaScript like so:

var x = <?php echo $varible ; ?>;

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In JavaScript, you can use a XMLHttpRequest to access your PHP script. This is called AJAX. I recommend you the JSON serialization method for the data you send & receive to / from the PHP script.