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displaying a variable value in javascript alert

 
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displaying a variable value in javascript alert
samn84
12 Mar, 2008 - 11:01 PM
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i m not sure wether it is possible but i wnt a php variable to be printed in a javascript alert.izzi possible.

the code is as follows:
$err=$arrerr['message']

i want $err variable to be printed in the alert below:

<script language="JavaScript" runat="server" type="text/javascript">
window.alert("Uniqueness Constraint Violated!");
</script>
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bhandari
RE: Displaying A Variable Value In Javascript Alert
13 Mar, 2008 - 12:12 AM
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I think you can't access php variables in javascript

you can store the value of that variable in a hidden HTNL field and then access that value in javascript.
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PsychoCoder
RE: Displaying A Variable Value In Javascript Alert
13 Mar, 2008 - 12:48 AM
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You cannot access PHP variables directly in JavaScript, PHP is server side, JavaScript is client side. You can, however, have PHP write your JavaScript for you, here's an example:


php

echo "<script language=\"javascript\" type=\"text/javascript\">\n";
echo "  alert("'" .$err . "'">);\n";
echo "</script>";



Give something like that a try. Also, this is more of a PHP question so I'm moving this to the PHP forum smile.gif
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no2pencil
RE: Displaying A Variable Value In Javascript Alert
13 Mar, 2008 - 12:52 AM
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QUOTE(PsychoCoder @ 13 Mar, 2008 - 01:48 AM) *

You cannot access PHP variables directly in JavaScript, PHP is server side, JavaScript is client side.

That's correct... just to add to the discussion:
By the time the code reaches your (the clients) web browser, PHP variables no longer exist, because they were processed by the PHP engine on the web server & are now part of the HTML code.
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