Share how php captures the email address code on a webpage

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How does php capture email addresses on webpages? I will share with you an example of using php to capture email addresses on webpages. /**
Desc: Collect the email code on the webpage
Link: www.jb100.net
Date:
*/
$ Url = 'HTTP: // www.jb100.net '; // url to be collected
$ Content = file_get_contents ($ url );
// Echo $ content;
Function getEmail ($ str ){
// $ Pattern = "/([a-z0-9] * [-_ \.]? [A-z0-9] +) * @ ([a-z0-9] * [-_]? [A-z0-9] +) + [\.] [a-z] {2, 3} ([\.] [a-z] {2 })? /I ";
$ Pattern = "/([a-z0-9 \-_ \.] + @ [a-z0-9] + \. [a-z0-9 \-_ \.] + )/";
Preg_match_all ($ pattern, $ str, $ emailArr );

Return $ emailArr [0];
}
Print_r (getEmail ($ content ));
?>The case is very simple, but it is very practical. If you need it, you can refer to it.

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