Escaped Mutant for Mutator "Concat": --- Original +++ New @@ @@ public static function existsMx(string $hostname) : bool { set_error_handler(static function (int $errorNumber, string $errorString) use($hostname) : bool { - throw new RuntimeException(sprintf('Failed to get DNS record "%s". ', $hostname) . $errorString, $errorNumber); + throw new RuntimeException($errorString . sprintf('Failed to get DNS record "%s". ', $hostname), $errorNumber); }); $hostname = rtrim($hostname, '.') . '.'; $result = dns_get_record($hostname, DNS_MX);

Escaped Mutant for Mutator "ConcatOperandRemoval": --- Original +++ New @@ @@ public static function existsMx(string $hostname) : bool { set_error_handler(static function (int $errorNumber, string $errorString) use($hostname) : bool { - throw new RuntimeException(sprintf('Failed to get DNS record "%s". ', $hostname) . $errorString, $errorNumber); + throw new RuntimeException(sprintf('Failed to get DNS record "%s". ', $hostname), $errorNumber); }); $hostname = rtrim($hostname, '.') . '.'; $result = dns_get_record($hostname, DNS_MX);

Escaped Mutant for Mutator "UnwrapRtrim": --- Original +++ New @@ @@ set_error_handler(static function (int $errorNumber, string $errorString) use($hostname) : bool { throw new RuntimeException(sprintf('Failed to get DNS record "%s". ', $hostname) . $errorString, $errorNumber); }); - $hostname = rtrim($hostname, '.') . '.'; + $hostname = $hostname . '.'; $result = dns_get_record($hostname, DNS_MX); restore_error_handler(); return count($result) > 0;

Escaped Mutant for Mutator "ConcatOperandRemoval": --- Original +++ New @@ @@ set_error_handler(static function (int $errorNumber, string $errorString) use($hostname) : bool { throw new RuntimeException(sprintf('Failed to get DNS record "%s". ', $hostname) . $errorString, $errorNumber); }); - $hostname = rtrim($hostname, '.') . '.'; + $hostname = rtrim($hostname, '.'); $result = dns_get_record($hostname, DNS_MX); restore_error_handler(); return count($result) > 0;

Escaped Mutant for Mutator "FunctionCallRemoval": --- Original +++ New @@ @@ }); $hostname = rtrim($hostname, '.') . '.'; $result = dns_get_record($hostname, DNS_MX); - restore_error_handler(); + return count($result) > 0; } /**

Escaped Mutant for Mutator "Concat": --- Original +++ New @@ @@ public static function existsA(string $hostname) : bool { set_error_handler(static function (int $errorNumber, string $errorString) use($hostname) : bool { - throw new RuntimeException(sprintf('Failed to get DNS record "%s". ', $hostname) . $errorString, $errorNumber); + throw new RuntimeException($errorString . sprintf('Failed to get DNS record "%s". ', $hostname), $errorNumber); }); $result = dns_get_record($hostname, DNS_A); restore_error_handler();

Escaped Mutant for Mutator "ConcatOperandRemoval": --- Original +++ New @@ @@ public static function existsA(string $hostname) : bool { set_error_handler(static function (int $errorNumber, string $errorString) use($hostname) : bool { - throw new RuntimeException(sprintf('Failed to get DNS record "%s". ', $hostname) . $errorString, $errorNumber); + throw new RuntimeException(sprintf('Failed to get DNS record "%s". ', $hostname), $errorNumber); }); $result = dns_get_record($hostname, DNS_A); restore_error_handler();

Escaped Mutant for Mutator "FunctionCallRemoval": --- Original +++ New @@ @@ throw new RuntimeException(sprintf('Failed to get DNS record "%s". ', $hostname) . $errorString, $errorNumber); }); $result = dns_get_record($hostname, DNS_A); - restore_error_handler(); + return count($result) > 0; } /**

Escaped Mutant for Mutator "IncrementInteger": --- Original +++ New @@ @@ /** * @psalm-suppress PossiblyUndefinedArrayOffset In this case `explode()` always returns an array with 2 elements. */ - [, $hostnameOrEmail] = explode('@', $hostnameOrEmail, 2); + [, $hostnameOrEmail] = explode('@', $hostnameOrEmail, 3); } return self::existsMx($hostnameOrEmail) || self::existsA($hostnameOrEmail); } }