php正则之从字符串中提取email地址_PHP教程

function extract_emails($str){

// This regular expression extracts all emails from a string:

$regexp = '/([a-z0-9_.-])+@(([a-z0-9-])+.)+([a-z0-9]{2,4})+/i';

preg_match_all($regexp, $str, $m);

return isset($m[0]) ? $m[0] : array();

}

$test_string = 'This is a test string...

test1@example.org

Test different formats:

test2@example.org;

foobar

strange formats:

test5@example.org

test6[at]example.org

test7@example.net.org.com

test8@ example.org

test9@!foo!.org

foobar ';

print_r(extract_emails($test_string));