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<?php $mailWithSpace = '"test space"@example.com'; $mailWithBackslashSpace = '"test\ space"@example.com'; var_dump(filter_var($mailWithSpace, FILTER_VALIDATE_EMAIL)); var_dump(filter_var($mailWithBackslashSpace, FILTER_VALIDATE_EMAIL));
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
bool(false) string(25) ""test\ space"@example.com"
preferences:
177.85 ms | 403 KiB | 210 Q