PHP Warning: POST Content-Length of 8978294 bytes exceeds the limit of 8388608 bytes in Unknown on line 0

1. Find php.ini [\xampp\php]
2. Just set these in php.ini:

upload_max_filesize = 1000M;
post_max_size = 1000M;

3. Rebot server
   • Stop Apache and MySQL
   • Start again Apache and MySQL

Go to

C:\drive\xampp(where xampp installed)

simply find php.ini file then in the file search

post_max_size=XXM
upload_max_size=XXM

Change with this code

post_max_size=100M
upload_max_filesize=100M

Don't forget to restart the xampp

Using wamp do the following and hopefully, it will resolve an issue

Make these changes in PHP Options to correct:

max_execution_time   180

memory_limit   512M or your highest available

post_max_size  32M

upload_max_filesize   64M

From the XAMPP panel, click on the ADMIN button on the Apache site. Then choose to edit php.ini And add the missing post_max_size to a value you are comfortable with.

post_max_size = 100M

I have fixed same issue by changing below parameters to expected value in /etc/php/7.2/apache2/php.ini file

upload_max_filesize = 8M;
post_max_size = 8M;

upload_max_filesize = 8M;
post_max_size = 8M;

Imagine you already changed above values. But what happen when user try to upload large files greater than 8M ?

This is what happen, PHP shows this warning!

Warning: POST Content-Length of x bytes exceeds the limit of y bytes in Unknown on line 0

you can avoid it by adding

ob_get_contents();
ob_end_clean();

You have 2 options for this error:

1. The file you are uploading is too big, which you need to use smaller file.
2. Increase the upload size in php.ini to

upload_max_filesize = 9M; post_max_size = 9M;

Go to browser and search for php.ini and then open it, and change these two values:

post_max_size= 1000000000000M

upload_max_filesize= 10000000000000M

If you open the php.ini file using notepad , you can search for these two values by clicking:
cmd + f

If changing the post_max_size settings from XAMPP folders. It did not work for you try this.

From XAMPP control panel, click config then PHP (php.ini) and edit post_max_size and upload_max_filesize to a higher number in this file instead. Stop Apache server. Start Apache server. This worked for me.

If your objective is to import a theme into your Wordpress then you can manually copy paste your theme into your wp-content->themes folder and extract it of course. I just encountered this and couldn't locate the php.ini file for WAMP.

I have solved my php7 issues on centos 7 by updating /etc/php.ini with these settings:

 post_max_size = 500M
 upload_max_filesize = 500M

As Optimaz ID pointed out, the code below helped me hide the PHP error message in a case where the user uploads a file larger than the upload_max_filesize and post_max_size set in php.ini (which is almost impossible when a large value is set).

ob_get_contents();
ob_end_clean();