This PR was submitted for the master branch but it was merged into the 2.7 branch instead (closes #22109). Discussion ---------- [Validator] check for empty host when calling checkdnsrr() | Q | A | | --- | --- | | Branch? | master| | Bug fix? | yes | | New feature? | no | | BC breaks? | no | | Deprecations? | no | | Tests pass? | yes | | Fixed tickets | #22106 | | License | MIT | | Doc PR | n/a | This should fix the email validator issue Commits ------- 7104c4e move provider after test c07fb41 update dataProvider function name 1825d0f cast substr result to string and remove empty function use 894127b rename dataset provider d973eb1 Add a test to prevent future regressions 6f24b05 Switch to `empty` native function to check emptiness f390f29 remove non relevant test case 91b665c Switch to `is_string` native method 6071ff6 Remove unnecessary parentheses 9753a27 Add a test case to prevent future regressions 4fcb24b Move empty condition in return statement a090ef8 Use LF line separator 60392fd fix coding standard to comply with fabbot 197d19f Remove malformed EmailValidatorTest + Update UrlValidator test 6b0702e Add empty check on host in other methods + add unit tests 6dd023f [Validator] Allow checkMX() to return false when $host is empty

Uh oh!