php代码实现从电子邮件中抽取一个字符串
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(); } $test_string = 'This is a test string... test1@example.org Test different formats: test2@example.org; <a href="test3@example.org">foobar</a> <test4@example.org> strange formats: test5@example.org test6[at]example.org test7@example.net.org.com test8@ example.org test9@!foo!.org foobar '; print_r(extract_emails($test_string));