php & javascript interaction

Hi,

can PHP be used to execute a JavaScript function?
And, can JavaScript be used to execute a PHP function?

if so, what is the basic coding to perform these actions.

thank you
Adrian

Sep 6 '06 #1

Subscribe Post Reply

6558

phpmaet

Yes, Let's execute Javascript function in PHP. you can see the following example.

<title>Untitled Document</title>
<SCRIPT LANGUAGE="javascript">
function Test()
{
alert ("This is Sample");
}
</SCRIPT>
</head>

<body>
<?
echo "<SCRIPT LANGUAGE='javascript'>";
echo "Test();";
echo "</SCRIPT>";
?>

Thanks

Sep 6 '06 #2

Banfa

9,065

Expert Mod 8TB

I disagree with phpmaet

php can not execute Javascript, Javascript can not execute php. This is beacuse php runs at the server and javascript runs at the client.

What phpmaet has done is use php to write javascript which will then run at the client, this might be a slightly subtle distinction but I beleiev it is an important 1.

I have used this trick myself (having php write javascript) and it is completely legal but php is not running javascript it is writing it for future exection. The javascript, as always, runs at the client computer.

Sep 6 '06 #3

phpmaet

i also disagree with Banfa

PHP CAN execute javascript.

Javascript CAN execute php

you should cut & paste and run my script.

sample.php
----------

<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>Untitled Document</title>
<SCRIPT LANGUAGE="javascript">
document.write("<? echo 'This is my inside script<BR><BR>'; ?>");
function Test()
{
alert ("This is Sample");
}
function fnClick()
{
window.location.href='sample.php?c=1';
}
</SCRIPT>
</head>
<body>
<?
if($_GET['c'])
{
echo "<SCRIPT LANGUAGE='javascript'>";
echo "Test();";
echo "</SCRIPT>";
}
?>
<input type="button" name="txs" onclick="fnClick()" value="Click here" />
</body>
</html>

Sep 6 '06 #4

ronverdonk

4,258

Expert 4TB

Banfa, you are absolutely right!
What is often forgotten is that PHP can only send HTML (and JS) to the client where it will execute, but not under control of PHP. PHP is merely the echo-er here.

Ronald :cool:

Sep 6 '06 #5

adriann

thanks guys. i can now understand the subtle process that are happening here.
thanks also for the code examples.

Sep 6 '06 #6

MerilFernando

Same Page Data Interaction

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 <?php  $xphp= "My PHP WORLD"; ?>   <!-- Define a PHP variable -->

<script> var xjs='My Java Script world'; </script> <!-- Define a JAVASCRIPT variable -->

<input type='hidden' id='myhtml' value='My HTML world!' > <!-- Define a HTML variable -->
 
<BR>sending PHP variable value into JAVASCRIPT <BR>

<script>

var xphp='<?php echo $xphp; ?>';

document.write(xphp);    

</script>
 
<BR>getting PHP variable value into HTML <BR>

<?php echo $xphp; ?>
 
<BR><BR>getting JAVASCRIPT  variable value into PHP <BR>

<?php

$xjs = "<script>document.write(xjs);</script>";

echo $xjs;

?>
 
<BR>getting JAVASCRIPT  variable value into HTML <BR>

<script>document.write(xjs);</script>
 
<BR><BR>getting HTML variable value into JAVASCRIPT  <BR> 

<script>

var xhtml=document.getElementById('myhtml').value;

document.write(xhtml);    

</script>
 
<BR>getting HTML variable value into PHP <BR> 

<?php

$xhtml = "<script>document.write(document.getElementById('myhtml').value);</script>";

echo $xhtml;

?>

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