insert code in header and body

when i add the code the error is on the 1st line of the code i add

Please check your wp-config.php again. Somewhere in the File was set double WP_DEBUG_LOG. Remove one of them and add only this:

define('WP_DEBUG_LOG', true)

oh yes but that don’t change the main problem

Yes but I need an error message than I can help you, that is the reason why I need the debug log to find the error. Do you can rename your functions.php to __functions.php in your Child Theme? Than we can see if the parent theme works fine.

Currently you said you want to add Code to Header / Footer. The solution is to write it inside your theme with php or to use a plugin: https://de.www.ads-software.com/plugins/header-footer-code-manager

with functions.php renamed it is still fine but wth this error

Deprecated: ltrim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/greenartcoin/domains/greenartcoin.eu/public_html/wp-includes/formatting.php on line 4494

Remove the WP_Debug from true to false. It’s only Deprecated Function. Maybe you have to set up your PHP to 8.0

tried several php version..always error

Sorry it sound’s that you have a theme error. Maybe you need to create a new Thread with all detailed information of you theme etc. Here in this Thread you only asked, how to add code to header and etc.

Add in the new Thread WP: specifices

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Hey @stefanocps ,

I think below plugin easy to add code in header, footer and body . So you can try any one plugin.
https://www.ads-software.com/plugins/insert-headers-and-footers/
https://www.ads-software.com/plugins/wp-headers-and-footers/