Fix issue with accessing array offset on boolean value in get_custom_logo_url function

[umairayub79]

Issue:

I encountered an issue with the get_custom_logo_url function where a warning was triggered due to attempting to access an array offset on a boolean value. This warning occurred on line 139 of the class-header-footer-api.php file in the headless-cms-master plugin. The warning arose because the function did not handle scenarios where the theme either did not support a custom logo or when no logo was set.

<b>Warning</b>: Trying to access array offset on value of type bool in <b>/home/baloch/Local Sites/headless/app/public/wp-content/plugins/headless-cms-master/inc/classes/api/class-header-footer-api.php</b> on line <b>139</b><br />

Additionally, there's an existing issue (#33) titled "Cannot find custom logo" that seems related to the same warning message.

Solution:

To address this issue comprehensively, I made the following improvements:

• Utilized the has_custom_logo() function to check if the current theme supports a custom logo.
• Added a check to verify if a custom logo ID exists before attempting to retrieve the custom logo URL.
• Provided a fallback URL or value if the theme doesn't support a custom logo or if no logo is set.

These changes ensure that the get_custom_logo_url function gracefully handles variations in theme configurations, preventing the warning from being triggered and providing a more robust solution overall.