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<?php var_dump(filter_var('holger@hütig.de', FILTER_VALIDATE_EMAIL)); var_dump(filter_var('holger@xn--htig-0ra.de', FILTER_VALIDATE_EMAIL));
Output for 5.2.0 - 7.2.6
bool(false) string(22) "holger@xn--htig-0ra.de"
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function filter_var() in /in/3RgaT 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/3RgaT 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/3RgaT 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/3RgaT on line 3