[wp-hackers] Plugin custom page

Tue Nov 20 17:18:09 UTC 2012

Hi,

Thanks for the replay but this is (ignoring abstractions) exactly what
I'm doing. I've got a URL like this:

mysite.com/?voucher=abc123

Which then uses template_redirect to check if a voucher is being
requested, then uses add_filter( 'the_content', ...) to change the
content that is being output to display my form. The problem is that
when the site homepage is displaying multiple blog entries (as a
standard installation does) then the add_filter( 'the_content', ...)
call gets run *once per post* leading to multiple instances of my
modified content down the page.

I need a way to say "when this querystring parameter is set display
this content once and once only, within the page/single/index
template".

Thanks,

Chris

On Mon, Nov 19, 2012 at 2:58 PM, Bryan Gentry <bryangentry at gmail.com> wrote:
> Chris,
>
> You will want to use the template_redirect hook:
>
>           add_action( 'template_redirect', 'voucher_template' );
>           function voucher_template() {
>               //check your query variables to determine whether a voucher
> is being displayed.
>              if ( $voucher_is_being_displayed ) {
>                        add_filter( 'the_content', 'voucher_content' );
>                       }
>             }
>
> Then you create a function that accepts the content and changes it
> appropriately:
>
>              function voucher_content($content) {
>                           //now add or change whatever you want to $content
>                           return $content;
>               }
>
> My Easy FAQ With Expanding Text plugin uses this, as does an unpublished
> plugin that allows one of my clients to create event pages.So far, this
> does the trick and is working with several different themes.
>
> Bryan Gentry
>
>
>> Date: Mon, 19 Nov 2012 08:35:02 +0000
>> From: "Chris Taylor - stillbreathing.co.uk"
>>         <chris at stillbreathing.co.uk>
>> Subject: [wp-hackers] Plugin custom page
>> To: wp-hackers at lists.automattic.com
>> Message-ID:
>>         <CAOb_bYY4qP2ojOHSno1mgs2WHbN=jsgjfPbKJPRiT4n4D=
>> t2XQ at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>>
>> Hi,
>>
>> I'm currently updating my VoucherPress plugin which allows WP admins
>> to create vouchers that visitors can download. One of the optional
>> features of a voucher is to require the user to register their name
>> and email address to get a link to download the voucher. When the user
>> clicks a link to the voucher they should see a form asking for their
>> name and email address. If the voucher doesn't require their email
>> then they get the PDF immediately.
>>
>> To support any template I need the form to be output using something
>> like the "the_content" filter, so it appears as if it's a real page.
>> The URL which is requested is something like
>> mysite.com/?voucher=abc123. This looked like it was going to work,
>> however when the front page is set to display multiple posts each post
>> gets its content filtered leading to multiple voucher forms on the
>> page. What would be the best way to handle this kind of custom page in
>> my plugin, seeing as just calling get_header() and get_footer() (which
>> is what the current version of the plugin does) may miss out large
>> parts of a templates design?
>>
>> 1) Use "the_content" and somehow break the loop?
>> 2) Use a custom URL (e.g. "mysite.com/voucherpress/abc123") and map
>> that to the page/single/index page?
>> 3) Something else?
>>
>> Many thanks,
>>
>> Chris
>>
>>
>> ------------------------------
>>
>> Message: 7
>> Date: Mon, 19 Nov 2012 04:47:36 -0500
>> From: Andrew Nacin <wp at andrewnacin.com>
>> Subject: Re: [wp-hackers] Accessing Update Check API Outside of
>>         WordPress
>> To: wp-hackers at lists.automattic.com
>> Message-ID:
>>         <
>> CAP29PvhLGM++K5qKnKK+f6zwZ_xUyMfHvk_LZ+EK+sM+ZXFkyA at mail.gmail.com>
>> Content-Type: text/plain; charset=ISO-8859-1
>>
>> On Sun, Nov 11, 2012 at 1:01 AM, Mark Smith <mark.smith1187 at yahoo.com
>> >wrote:
>>
>> > I took a look at update.php to see how WordPress does it but the myriad
>> of
>> > WordPress functions seems to just confuse me as to what exactly is being
>> > posted to the API endpoints
>> > http://api.wordpress.org/plugins/update-check/1.0/ and
>> > http://api.wordpress.org/themes/update-check/1.0/. Can anyone explain to
>> > me what eactly needs to be posted to get the current version of each
>> plugin
>> > and theme.
>>
>>
>> If you use the /info/ endpoint for a single plugin, you'll end up with the
>> current version. The update-check endpoints are designed for checking a
>> bunch of plugins en masse, and for when you may not know the actual slug of
>> the plugin. (It does some fairly complex matching using pretty much every
>> plugin header to make sure it finds the right plugin.)
>>
>> Example: http://api.wordpress.org/plugins/info/1.0/debug-bar.json. Other
>> accepted formats include .xml and .php.
>>
>>
>> ------------------------------
>>
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>>
>>
>> End of wp-hackers Digest, Vol 94, Issue 28
>> ******************************************
>>
>
>
>
> --
> *Bryan Gentry*
> Web designer, writer, editor
> http://bryangentry.us
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