Archived topic

Using "Simple PHP" plugin generates errors

7 replies · Started by Anonymous on July 10, 2016

Viewing posts 1–8 of 8

July 10, 2016 at 2:26 pm #208037

I found the article in the knowledge base about adding PHP. I downloaded the Simple PHP plugin, and added

echo "This is our custom template!";

I tried it with and without a closing ?>

This is what I get now:

This is our custom template!
Warning: Cannot modify header information - headers already sent by (output started at /home/bsa566/public_html/wp-content/plugins/generate-simple-php/custom.php:8) in /home/bsa566/public_html/wp-content/plugins/wpclef/includes/lib/wp-session/class-wp-session.php on line 130

Warning: Cannot modify header information - headers already sent by (output started at /home/bsa566/public_html/wp-content/plugins/generate-simple-php/custom.php:8) in /home/bsa566/public_html/wp-content/plugins/custom-database-tables/lib/webapis.php on line 131

Also, I am a little confused. I want to write some custom PHP (custom database table access) on just a subset of the pages, not all of them -- is this the right way to do it?

July 10, 2016 at 2:28 pm #208038

Can you paste the entire contents of your simple PHP code into a pastebin and show me?: http://pastebin.com/

Looks like there might be an error in there.

July 11, 2016 at 5:13 pm #208548

I have pasted it to <http://pastebin.com/Fd0ESh8M>

July 11, 2016 at 7:49 pm #208574

Not seeing anything wrong with it, but it just might be that you're echoing code which can interfere with other code.

Try this instead:

add_action( 'generate_before_header','generate_test_function' );
function generate_test_function()
{
    echo 'This is a test.';
}

July 11, 2016 at 11:09 pm #208590

OK - I tried that and I don't get any errors now. Thanks!

However, if I call that method (generate_test_function()) I get the same problem. It looks like it's because the script code is injected PRIOR to the <html> tag (see below). That seems bad, but not fatal. Assuming it's okay, this brings up my other question. I can define functions here, but how do I call them (and only on some pages, not all of them)? Calling them in the simple PHP causes an error. In my use case, I want to provide a search UI against some custom database tables, but only for certain pages, not all.

Thanks.

--Nik
-----------

This is a test. 
Warning: Cannot modify header information - headers already sent by (output started at /home/bsa566/public_html/wp-content/plugins/generate-simple-php/custom.php:11) in /home/bsa566/public_html/wp-content/plugins/wpclef/includes/lib/wp-session/class-wp-session.php on line 130 
<!DOCTYPE html>


<html xmlns="http://www.w3.org/1999/xhtml" class="wp-toolbar" lang="en">

<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Edit Plugins ‹ — WordPress</title>
<script type="text/javascript">

July 11, 2016 at 11:29 pm #208592

Calling a function directly in that file will cause errors, as that file is for defining functions, or hooking them into the template.

If you define a function in there, you need to then call that function inside a template file, inside a function which hooks it into the template (my example), or in GP Hooks.

Hope this helps :)

July 27, 2016 at 6:08 pm #213426

A few questions. The answer may be the same for both :-)

1) I find that some of my HTML that I put into PHP is being ignored when in Generate Press pages. For example, table borders are always present, the align attribute is ignored, as is colspan for a TD. They work fine if I just make plain HTML and open it in the same browser. How can I get those to work again?

2) I have an IFRAME that runs some PHP code. Though I've turned off all the page attributes, like footer, sidebar, etc., I still get a thick gray background color at the bottom and the page contents are inset. Is there a way to have GP just show a page without any "GP stuff"? I need access to Wordpress database calls so it can't be a vanilla PHP somewhere random.

July 27, 2016 at 11:37 pm #213468

Hi there,

1. This will remove the borders: https://generatepress.com/forums/topic/table-boarders/#post-129050

The align attribute should be replaced with CSS.

You can remove all of GP's styling of borders with this CSS:

table {
    border-collapse: initial;
    border-spacing: initial;
    border-width: initial;
}

table, td, th {
    border: initial;
}

2. Can you link me to the page so I can see?

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