Upon upgrading PHP to 8.1, this warning-level error is output to the screen:
Deprecated function: Automatic conversion of false to array is deprecated in qtip_clean_settings() (line 787 of example.com/sites/all/modules/qtip/qtip.module).
The error is in the function qtip_clean_settings():
On line line 727, $settings['style']['tip'] is set to FALSE.
By line 787, $settings['style']['tip']['corner_position'] is no longer a valid array element, even though the code is trying to unset it. This is due to a change in PHP 8.1 where automatic conversions of FALSE to arrays are deprecated.
1. Turn on error logging and/or display errors
2. Upgrade to PHP 8.1+
3. View any page on the site and the error will appear.
To fix this, we can move line 787 up to the isset() check on line 734 as follows:
// Set the tooltip value properly if it is explicitly set to a position
if (isset($settings['style']['tip']['corner_position'])) {
if (!empty($settings['style']['tip']['corner_position'])) {
$settings['style']['tip']['corner'] = $settings['style']['tip']['corner_position'];
}
unset($settings['style']['tip']['corner_position']);
}
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