php verify email is correct

# Is the php verification email correct?

1: Verify the email address by bringing it in

eg: $result = filter_var('bob@example.com', FILTER_VALIDATE_EMAIL);

When printing the results , if the format is correct, the email address is output, if it is wrong, false

2 is output: Regular matching

(1) $regex= '/\w ([- .]\w )*@ \w ([-.]\w )*\.\w ([-.]\w )*/';

（2）$regex="/([a-z0-9]* [-_.]?[a-z0-9] )*@([a-z0-9]*[-_]?[a-z0-9] ) [.][a-z]{2,3}( [.][a-z]{2})?/i";

Both of the above two regular expressions can be used to match email addresses. The matching method is as follows:

$str = "email@example.com";
$result = preg_match($regex,$str)；

If the email address is in the correct format, The result value is 1, and the error is false

PS: Paste the regular verification of landline and mobile phone numbers↓

$isTel="/^([0-9]{3,4}-)?[0-9]{7,8}$/";
$isMob="/^1[3-8]{1}[0-9]{9}$/";

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