in version 3 xdebug removed xdebug.default_enable

[bashkarev]

see https://3.xdebug.org/docs/upgrade_guide

[nikic]

Does xdebug 3 throw a warning when setting the old name?

[bashkarev]

message Xdebug: [Config] The setting 'xdebug.default_enable' has been renamed, see the upgrading guide at https://xdebug.org/docs/upgrade_guide#changed-xdebug.default_enable (See: https://xdebug.org/docs/errors#CFG-C-CHANGED) to php_log_err, it breaks tests

[derickr]

@nikic Only if E_DEPRECATED is part of error_reporting. For PHP 8 and higher it's OK to only have xdebug.mode=off, but for 7, it should have both still.

[nikic]

This seems fine as a) XDebug 2 is not compatible with PHP 8 and b) run-tests.php is distributed by phpize and corresponds to a specific PHP version. While it's possible to use a newer run-tests.php against an older PHP version with XDebug 2, that's not what happens in a default configuration.