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PHP filter_var() 函数
tryphp_func_filter_var2
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<!DOCTYPE html> <html> <body> <?php // Variable to check $email = "john.doe@example.com"; // Remove all illegal characters from email $email = filter_var($email, FILTER_SANITIZE_EMAIL); // Validate e-mail if (filter_var($email, FILTER_VALIDATE_EMAIL)) { echo("$email is a valid email address"); } else { echo("$email is not a valid email address"); } ?> </body> </html>