There are many ways to verify mailbox addresses. In the browser side, JS mailbox authentication can be detected through regular expressions.
Like what:
Copy Code code as follows:
function Isemail (email) {
return/^ (([a-z]|\d|[! #\$%& ' \*\+\-\/=\?\^_ ' {\|} ~]| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]) +(\. ([a-z]|\d| [!#\$%& ' \*\+\-\/=\?\^_ ' {\|} ~]| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]) +)*)| ((\x22) (((\x20|\x09) * (\x0d\x0a))? \x20|\x09) +)? ([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21| [\x23-\x5b]| [\x5d-\x7e]| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]) | (\ \ ([\x01-\x09\x0b\x0c\x0d-\x7f]| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]))) * (((\x20|\x09) * (\x0d\x0a))? (\x20|\x09) +)? (\x22))) @ (([a-z]|\d| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]) | ([a-z]|\d| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]) ([a-z]|\d|-|\.| _|~| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]) * ([a-z]|\d| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF])) \.) + ([a-z]| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]) | ([a-z]| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]) ([a-z]|\d|-|\.| _|~| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF]) * ([a-z]| [\U00A0-\UD7FF\UF900-\UFDCF\UFDF0-\UFFEF])) $/i.test (email);
}
The call is simple:
Copy Code code as follows:
if (Isemail (' youremail@yourdomain.com ')) {Console.log (' is valid ');}
If you are doing server-side validation. Like PHP, the easiest thing to do is:
Copy Code code as follows:
/*
* Email address legality verification
*/
function Isemail ($mail _address) {
Return Filter_var ($mail _address, filter_validate_email);
}
But the whole thing can be complicated.
Like this. He built up a set of email address verification website system. It is estimated that few people do so.
To tell the truth, I have to admire it.
