/** * Check an email address for correct format. * * @link http://www.iamcal.com/publish/articles/php/parsing_email/ * @link http://www.w3.org/Protocols/rfc822/ * * @param string $email email address * @param boolean $strict strict RFC compatibility * @return boolean */ public static function email($email, $strict = FALSE) { if (UTF8::wpstrlen($email) > 254) { return FALSE; } if ($strict === TRUE) { $qtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]'; $dtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]'; $atom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+'; $pair = '\\x5c[\\x00-\\x7f]'; $domain_literal = "\\x5b({$dtext}|{$pair})*\\x5d"; $quoted_string = "\\x22({$qtext}|{$pair})*\\x22"; $sub_domain = "({$atom}|{$domain_literal})"; $word = "({$atom}|{$quoted_string})"; $domain = "{$sub_domain}(\\x2e{$sub_domain})*"; $local_part = "{$word}(\\x2e{$word})*"; $expression = "/^{$local_part}\\x40{$domain}\$/D"; } else { $expression = '/^[-_a-z0-9\'+*$^&%=~!?{}]++(?:\\.[-_a-z0-9\'+*$^&%=~!?{}]+)*+@(?:(?![-.])[-a-z0-9.]+(?<![-.])\\.[a-z]{2,6}|\\d{1,3}(?:\\.\\d{1,3}){3})$/iD'; } return (bool) preg_match($expression, (string) $email); }
/** * Pads a UTF-8 string to a certain length with another string. This is a * UTF8-aware version of [str_pad](http://php.net/str_pad). * * $str = UTF8::wpstr_pad($str, $length); * * @author Harry Fuecks <*****@*****.**> * @param string $str input string * @param integer $final_str_length desired string length after padding * @param string $pad_str string to use as padding * @param string $pad_type padding type: STR_PAD_RIGHT, STR_PAD_LEFT, or STR_PAD_BOTH * @return string */ public static function str_pad($str, $final_str_length, $pad_str = ' ', $pad_type = STR_PAD_RIGHT) { if (UTF8::is_ascii($str) and UTF8::is_ascii($pad_str)) { return str_pad($str, $final_str_length, $pad_str, $pad_type); } $str_length = UTF8::wpstrlen($str); if ($final_str_length <= 0 or $final_str_length <= $str_length) { return $str; } $pad_str_length = UTF8::wpstrlen($pad_str); $pad_length = $final_str_length - $str_length; if ($pad_type == STR_PAD_RIGHT) { $repeat = ceil($pad_length / $pad_str_length); return UTF8::wpsubstr($str . str_repeat($pad_str, $repeat), 0, $final_str_length); } if ($pad_type == STR_PAD_LEFT) { $repeat = ceil($pad_length / $pad_str_length); return UTF8::wpsubstr(str_repeat($pad_str, $repeat), 0, floor($pad_length)) . $str; } if ($pad_type == STR_PAD_BOTH) { $pad_length /= 2; $pad_length_left = floor($pad_length); $pad_length_right = ceil($pad_length); $repeat_left = ceil($pad_length_left / $pad_str_length); $repeat_right = ceil($pad_length_right / $pad_str_length); $pad_left = UTF8::wpsubstr(str_repeat($pad_str, $repeat_left), 0, $pad_length_left); $pad_right = UTF8::wpsubstr(str_repeat($pad_str, $repeat_right), 0, $pad_length_right); return $pad_left . $str . $pad_right; } }