除去字母,数字和!#$%&'* +-=?^ _`{|}〜@。[]以外的所有字符。
var_dump(filter_var('john@example.com', FILTER_SANITIZE_EMAIL)); var_dump(filter_var("!#$%&'*+-=?^_`{|}~.[]@example.com", FILTER_SANITIZE_EMAIL)); var_dump(filter_var('john/@example.com', FILTER_SANITIZE_EMAIL)); var_dump(filter_var('john\@example.com', FILTER_SANITIZE_EMAIL)); var_dump(filter_var('joh n@example.com', FILTER_SANITIZE_EMAIL));
结果:
string(16) "john@example.com" string(33) "!#$%&'*+-=?^_`{|}~.[]@example.com" string(16) "john@example.com" string(16) "john@example.com" string(16) "john@example.com"