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Passing PHP variable value to jquery function

Answer 1

A:

jQuery runs on the client, whereas PHP runs on the server. So, there is no way to pass a PHP variable to a jQuery function. You could write directly to the onchange callback:

<input type='checkbox' name='lida' value='mensagem_id' onchange='my_function( <?php 
    $mensagem_id = "3";
    echo $mensagem_id; 
 ?>
)'/>

Also note that in jQuery you should avoid setting events this way and use jQuery events instead:

$('#myinputid').change(function() {
});

Another way will be to set a hidden field with the PHP variable and use javascript/jQuery code to read it on client side.

kgiannakakis 2010-03-03 11:41:38

and can I pass variable values to that jquery event?

Metraton 2010-03-03 12:00:40

Yes, by using the same techniques

kgiannakakis 2010-03-03 12:29:00

Answer 2

A:

i think you don't have to use that var in your function parameter...

j. 2010-03-03 11:42:21

Very true. Parameters are not the places to declare variables. It should just be (mensagem_id). Or, better, (mId) or something short--you don't need to declare it, just pass it when you call the function.

D_N 2010-03-03 11:43:46

I tried that but still get the my_function() not defined, message :(

Metraton 2010-03-03 11:53:53

Answer 3

A:

Take "var" away from the function definition, and use <?php echo and ?> around $mensagem_id in the onchange call.

But you're not using jQuery at all, just simple Javascript.

kemp 2010-03-03 11:42:34

I know, it's only javascript for now, but later i want to add some jquery stuff but i need to start from here :)I updated the code with your suggestion:<?php ?><HTML> <HEAD> <script type="text/javascript" src="jquery-1.4.2.js"></script> <script type="text/javascript"> function my_function(mensagem_id) { alert("Sucesso, Mensagem nº: " + mensagem_id); } </script> </HEAD> <BODY> <?php $mensagem_id = "3"; echo $mensagem_id; ?> <input type='checkbox' name='lida' value='mensagem_id' onchange='my_function(<?php echo $mensagem_id; ?>)'/> </BODY></HTML>Still the same error

Metraton 2010-03-03 11:52:59

That code works fine for me

kemp 2010-03-03 13:00:54

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Passing PHP variable value to jquery function

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