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run code in 150+ php & hhvm versions
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<?php $email = 'terzifll@terzisrl.191.it'; $checked = filter_var($email, FILTER_VALIDATE_EMAIL); var_dump($email, $checked);
Output for 5.2.0 - 5.2.9, 5.2.11 - 5.2.17, 5.3.1 - 5.6.28, 7.0.0 - 7.1.0
string(24) "terzifll@terzisrl.191.it" string(24) "terzifll@terzisrl.191.it"
Output for hhvm-3.12.0

Process exited with code 137.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.2.10, 5.3.0
string(24) "terzifll@terzisrl.191.it" bool(false)
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function filter_var() in /in/la0ig on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: filter_var() in /in/la0ig on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: filter_var() in /in/la0ig on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: filter_var() in /in/la0ig on line 3