Editing Regular expression in Mandarin (section)

==== Find non-ASCII characters in PHP ====
尋找欄位值包含中文字，中文字包含繁體中文與簡體中文，不包含標點符號 (例如 {{kbd | key = <nowiki>,</nowiki>}})、全形標點符號 (例如 {{kbd | key = <nowiki>，</nowiki>}})以及特殊符號，例如 Emoji：{{kbd | key = ⭐}}。
PHP: exact match
<pre>
// approach 1
if (preg_match('/^[\x{4e00}-\x{9fa5}]+$/u', $string)) {
	echo "全部文字都是中文字" . PHP_EOL;
}else{
	echo "部分文字不是中文字" . PHP_EOL;
}

// approach 2
if (preg_match('/^[\p{Han}]+$/u', $string)) {
	echo "全部文字都是中文字" . PHP_EOL;
}else{
	echo "部分文字不是中文字" . PHP_EOL;
}
</pre>

partial match ([http://sandbox.onlinephpfunctions.com/code/d780845d20877c0fd2e693b28ed02a10d250d39e online demo] hosted by [http://sandbox.onlinephpfunctions.com/ PHP Sandbox])
<pre>
// approach 1
$string = '繁體中文-简体中文-English-12345-。，！-.,!-⭐';
$pattern = '/[\p{Han}]+/u';
preg_match_all($pattern, $string, $matches, PREG_OFFSET_CAPTURE);

var_dump($matches);

// approach 2
$string = '繁體中文-简体中文-English-12345-。，！-.,!-⭐';
$pattern = '/[\x{4e00}-\x{9fa5}]+/u';
preg_match_all($pattern, $string, $matches, PREG_OFFSET_CAPTURE);

var_dump($matches);
</pre>

技術問題除錯: 錯誤訊息
<pre>preg_match(): Compilation failed: character value in \x{} or \o{} is too large at offset 8</pre>

解決方式: [http://php.net/manual/en/function.preg-match.php preg_match()] 需要加上 {{kbd | key = u }} 變數<ref>[https://stackoverflow.com/questions/32375531/preg-match-compilation-failed-character-value-in-x-or-o-is-too-large-a php - preg_match(): Compilation failed: character value in \x{} or \o{} is too large at offset 27 on line number 25 - Stack Overflow]</ref>。