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RESOLVED Warning: Cannot modify header information - headers already sent

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1
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0
Points
1
#1
Hello,

We had a problem with Dublicate Content on our website happy-pet-club.de, so we wanted to insert the following snippet on all pages of the domain, which contains the Canonical-tag.

Code:
<?php
$actual_link = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
echo "<link rel='canonical' href=$actual_link>
?>
Since then the following problem occurs on all pages, also in the backend:
Code:
Warning: Cannot modify header information - headers already sent by (output started at /kunden/555370_51105_webseiten/happy-pet-club.de/wordpress/wp-content/plugins/insert-php/includes/class.execute.snippet.php:52) in /kunden/555370_51105_webseiten/happy-pet-club.de/wordpress/wp-includes/pluggable.php on line 1251

Warning: Cannot modify header information - headers already sent by (output started at /kunden/555370_51105_webseiten/happy-pet-club.de/wordpress/wp-content/plugins/insert-php/includes/class.execute.snippet.php:52) in /kunden/555370_51105_webseiten/happy-pet-club.de/wordpress/wp-includes/pluggable.php on line 1254
Since we cannot access the backend, we cannot remove the snippet.

We have already tried to delete the folder "insert-php" on the webspace and drag an unconfigured one onto it. This deactivates the plugin hard. But as soon as we activate it again, the error occurs again.

Is there a way to remove the faulty snippet? If necessary also from the database, if it is stored there?

Best regards,
Arthur Sliwa
 

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alexkovalev

Program developer
Staff member
Messages
231
Likes
17
Points
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#2
Hi,

Do not despair! Even an experienced person can make mistakes. We created a secure mode for this case. Go into it and your snippets code will not be executed.
  1. Go to the safe mode by this link: http://your-site-name.dev/wp-admin/?wbcr-php-snippets-safe-mode
  2. Edit the snippet in which you made a mistake;
  3. Leave safe mode by clicking the link: http://your-site-name.dev/wp-admin/?wbcr-php-snippets-disable-safe-mode
Great, now you should not have any issues!

You must be logged in and have an administrator role to use safe mode!

Best regards, Alex