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@ 2019-08-26T09:10:16Z

<?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
Performance
VLD
References
Branches

var_dump: documentation ( source)
filter_var: documentation ( source)

preferences:dark modelive preview

15.32 ms | 402 KiB | 5 Q