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<?php $email = 'test@io'; $host = substr($email, strpos($email, '@')); var_dump(substr_count($email, '@') === 1 && (checkdnsrr($host)) || checkdnsrr($host, 'A')));
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.35
Warning: Unexpected character in input: '' (ASCII=15) state=0 in /in/S8hjT on line 4 Parse error: syntax error, unexpected ')' in /in/S8hjT on line 4
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Warning: Unexpected character in input: '' (ASCII=15) state=1 in /in/S8hjT on line 4 Parse error: syntax error, unexpected ')' in /in/S8hjT on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
Warning: Unexpected character in input: '' (ASCII=15) state=1 in /in/S8hjT on line 4 Parse error: parse error, unexpected ')' in /in/S8hjT on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Warning: Unexpected character in input: '' (ASCII=15) state=1 in /in/S8hjT on line 4 Parse error: parse error in /in/S8hjT on line 4
Process exited with code 255.

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