Выбор регулярных выражений, обычно используемых в PHP (Рекомендуется)

$regex ='[4e00 - 9fa5]'; // Regular expressions matching Chinese characters
$regex ='^ [4E00- 9FA5A-Za-z0-9]+'; or $regex ='^ [4E00- 9FA5A-Za-z0-9] {2,20}$'; // Chinese, English, numerals but excluding underscores and other symbols
$regex ='^ [a-zA-Z] [a-zA-Z0-9_] {4,15}$'; // Account is legal (letters start, 5-16 bytes allowed, letters and numbers underlined)
$regex ='[^\ x00- xff]'; // matching double-byte characters (including Chinese characters)
$regex =' n [ s |]* r'; // Regular expression matching blank lines
$regex ='/<(*)>. * < /1> < (*)\\\/'; // Regular expressions matching HTML Tags
$regex ='(^ s *) | ( s *$)'; // Regular expression matching header and tail spaces
$regex ='/(d+). (d+) (d+). (d+). (d+)\. (\d+)/g'; //Regular expression matching IP address
$regex =' w+([-+.] w+)* @  w+ ([-.] w+)*  w+ ([-.] w+)*\\ w+)* \. \ w+ *'; /// Regular expression matching email address
$regex ='^ (13 [0-9] | 14 [5 | 7] | 15 [0 | 1 | 2 | 3 | 5 | 6 | 7 | 8 | 9] | 18 [0 | 1 | 2 | 3 | 5 | 6 | 7 | 8 | 9]\ D {8}$; //cell phone number
$regex ='^[1-9]\ D {5} (18 | 19 ([23] d)\ d) D {2} ((0 [1-9]) | (10 | 11 | 12)([0-2] [1-9]) | 10 | 20 | 30 | 31)\ D {3} [0-9Xx]$; //18-bit ID number
$data = "***********";
if (preg_match($regex,$data)) {
  Echo "validation success";
} else {
  Echo: "What are you typing in? ";
}

String = abcd23uo* &* (.
preg_match_all("/[\w\s]/i", $string, $matches);
print_r(implode('', $matches[0]));

String = abcd23uo* &* (.
preg_match_all("/([\x{4e00}-\x{9fa5}])/u", $string, $matches);
print_r(implode('', $matches[0]));