FAQ Topic - How do I get a perl/asp/php variable into client-side js? (2008-03-02)

[FAQ server]

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FAQ Topic - How do I get a perl/asp/php variable into
client-side js?
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Use the server-side language to generate the javascript:

var jsvar="<%= aspvar %>";
var jsvar="<?php echo $phpvar ?>";


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[toby.oconnell@gmail.com]

Re: FAQ Topic - How do I get a perl/asp/php variable into client-sidejs? (2008-03-02)

On Mar 1, 4:00 pm, "FAQ server" <javascr...@dot internet.bewrot e:

-----------------------------------------------------------------------
FAQ Topic - How do I get a perl/asp/php variable into
client-side js?
-----------------------------------------------------------------------
>
Use the server-side language to generate the javascript:
>
 var jsvar="<%= aspvar %>";
 var jsvar="<?php echo $phpvar ?>";
>
--

This FAQ entry should probably mention that the server-side value (if
a string) needs to be escaped for whatever style quote is surrounding
the javascript var statement (double-quote here).

It should be fairly obvious, but the people asking this question will
probably be fooled by the simplicity of the two example statements. I
almost missed this pitfall the first time I wrote such code.

[toby.oconnell@gmail.com]

Re: FAQ Topic - How do I get a perl/asp/php variable into client-sidejs? (2008-03-02)

This FAQ entry should probably mention that the server-side value (if
a string) needs to be escaped for whatever style quote is surrounding
the javascript var statement (double-quote here).
>
It should be fairly obvious, but the people asking this question will
probably be fooled by the simplicity of the two example statements.  I
almost missed this pitfall the first time I wrote such code.

Oh yes, and new lines in a string will break js literals so they need
to be handled specially. Probably other pitfalls I am not aware of.
A one sentence note of these pitfalls would be helpful.

[Thomas 'PointedEars' Lahn]

Re: FAQ Topic - How do I get a perl/asp/php variable into client-sidejs? (2008-03-02)

toby.oconnell@g mail.com wrote:

On Mar 1, 4:00 pm, "FAQ server" <javascr...@dot internet.bewrot e:

>-----------------------------------------------------------------------
>FAQ Topic - How do I get a perl/asp/php variable into
>client-side js?
>-----------------------------------------------------------------------
>>
>Use the server-side language to generate the javascript:
>>
> var jsvar="<%= aspvar %>";
> var jsvar="<?php echo $phpvar ?>";
>[...]

>
This FAQ entry should probably mention that the server-side value (if
a string) needs to be escaped for whatever style quote is surrounding
the javascript var statement (double-quote here).

Good catch.

var jsvar = "<?php echo addslashes($php var); ?>";

Or with asp_tags=1 in php.ini:

var jsvar = "<%= addslashes($php var); %>";


PointedEars
--
var bugRiddenCrashP ronePieceOfJunk = (
navigator.userA gent.indexOf('M SIE 5') != -1
&& navigator.userA gent.indexOf('M ac') != -1
) // Plone, register_functi on.js:16