When I open my website link ,I found errors.The error is:
"Cannot modify header information - headers already sent by (output started at ...../wp-includes/pomo/entry.php:2) in /...../wp-includes/pomo/pomo.php(1) : eval()'d code on line 1".
And I cannot log in my website admin that shows plugabble.php errors.
How can I do that?
You need to troubleshoot whats going on...
Check plugin compatibility issues, deactivate plugind and see if it works
Another problem might be that you have gotten some text or whitespace [spaces or newline] before the opening PHP tag or after the closing PHP tag in your theme's functions.php file. There can't be a single character before or after those tags, check that...
Remove white spaces from other files, on wp-congig.php maybe...
Do your research on wordpress forums, the below link might help
https://wordpress.org/support/topic/cannot-modify-header-information-headers-already-sent-4
Its white space error or space in < ? ? > <? php etc.
so check again. also as per your notice check includes/pomo/entry.php:2 this file and see line no 2.
if there is extra space etc then remove it.
ALso if it will not solve then open function.php file of theme and remove space in bottom of the page.
or last step is remove space from wp-config file.
Related
Launched a new WP site about 1 month ago, and there were no issues at the time. Now there are instances of this character (�) inserting itself into posts. Looks to be happening where an open tag begins. Some sort of character encoding problem? Only happening in posts, not pages, so possibly a database issue?
You haven't copied and pasted the content from another editor like Word, have you?
It's encoding causing the problem, where Wordpress doesn't recognise the character you're using. If you hand code it rather than using the visual editor you shouldn't see it, and the most likely cause is inheriting the character from a piece of software that you have previously edited in.
Step 1) Open the wp-config.php file in a text editor such as notepad (the wp-config.php file can be found on the directory where you installed WordPress).
Step 2) Find the following two lines and comment them out:
define('DB_CHARSET', 'utf8');
define('DB_COLLATE', '');
They should look like the following after you comment them out:
//define('DB_CHARSET', 'utf8');
//define('DB_COLLATE', '');
Step 3) Now upload the updated wp-config.php file to your webhost (overwriting the old one).
My template starts with <!DOCTYPE html> on the first line, but for some reason when I view source on the page that's rendered, it starts on line 2.
This isn't a big deal in HTML, but I'm trying to render some XML and I'm running into the same issue, except XML isn't forgiving like HTML and must start on the first line.
EDIT
Thank you for the comments! I am a fairly new developer and was not aware of the BOM. That being said, I use PhpStorm, and you can just right click on a folder, then click 'Remove BOM', which I have done.
After doing that I ran this terminal command I found someone post grep -rl $'\xEF\xBB\xBF' that outputs files in the directory that have the BOM character. There were a few files listed, and I've fixed them all except /vendor/doctrine/orm/lib/Doctrine/ORM/Query/TreeWalkerAdapter.php. I've tried removing the BOM with PhpStorm, and haven't had any luck, so I opened the file with VIM and ran set nobomb like I found here: How do I remove  from the beginning of a file?, but it still comes out in the listing of the grep command above.
I faced the same issue, but because I closed my PHP file with "?>" and added some blank lines after. After removing the "?>", problem has been solved.
In this case nothing related to BOM directly (I was in UTF-8).
If this can help other people who find this post with the same issue than me.
See post : php: empty line from nowhere
I've put about 4 hours into trying to solve this issue. Please Help!
I've been working on developing my first custom plugin. Everything was going well until I started references files in subdirectories in my plugin. Here's the complete error I'm seeing every time I activate the plugin:
"The plugin generated 1521 characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin."
My plugin file hierarchy is as follows:
Main File: wp-content/plugins/myplugin/index.php
Database Building File: wp-content/plugins/myplugins/DB/initialize.php
In my index.php file, I'm calling the initialize.php file using the register_activation_hook function.here's the whole code:
add_action('admin_menu', 'form_forge_options');
include_once dirname(__FILE__) . '/DB/initialize_database.php';
register_activation_hook(__FILE__ , 'bbp_g_init_database');
I've often found that the cause of this error is whitespace (or anything else) before the opening tag.
Use after the plugin(means at start) header ob_start();
i hope will help you:>
I've often found that the cause of this error is whitespace (or anything else) before the opening <?php tag or after the closing ?> tag. You can leave the closing tag off to avoid the latter issue.
However, after looking around on Google, it appears there are other possible reasons for this error message, and even a plugin that will help you debug this specific issue: Debug Plugin Activation Errors
I got the Cannot modify header... error in Wordpress. I tried all the backspace stuff but that didn't work. At the end I had to clear all the enters in my function.php.
This makes my function.php file rather unpleasent to read when i'm working in it. Can someone explain why I can't use the enter key? Because when i put in a blank line the error messages comes right back??
Sometimes, it cab be happen not only spaces in functions.php.
Sometimes, it occurs if you have spaces in wp-config.php too.
Just follow below options and steps.
http://www.mytrickpages.com/2013/11/how-to-fix-wordpress-error-cannot-modify-header-information.html
I just uploaded my themantic child theme and am getting a weird error message every time i try to install a plugin
Warning: Cannot modify header information - headers already sent by (output started at /home/content/29/7464729/html/wp-content/themes/coolness/functions.php:126) in /home/content/29/7464729/html/wp-includes/pluggable.php on line 934
Does anybody know what i should do about this?
Check your code with following guide:-
Remove blank line before the opening php statement
Remove blank lines after the closing php statement
Remove irrelevant echo's in your code
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