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PHP regular match Chinese in string_PHP tutorial

WBOYOriginal: 2016-07-20 11:11:251425browse

This article summarizes some example functions in PHP that use regular expressions to match Chinese. Friends in need can refer to them.

We must first understand
Chinese double-byte character encoding range

1. GBK (GB2312/GB18030)
x00-xff GBK double-byte encoding range
x20-x7f ASCII
xa1-xff Chinese gb2312
x80-xff Chinese gbk

2. UTF-8 (Unicode)

u4e00-u9fa5 (Chinese)
x3130-x318F (Korean)
xAC00-xD7A3 (Korean)
u0800-u4e00 (Japanese)

Get the specified Chinese and characters
Example 1

The code is as follows td>	Copy code

代码如下	复制代码
$str = '正则如何匹配中文字在某中文字符串中？'; preg_match("/中/",$str,$regs); print_r($regs); ?>

$ str = 'How to match Chinese characters in a Chinese string with regular expressions? ';

preg_match("/中/",$str,$regs);
print_r($regs);
?>

Output

Array

(

[0] => in

代码如下

复制代码

$str = '这里是中文 this is English';
//把中文变成红色
echo preg_replace("/([x80-xff].)/","1",$str);
//把非中文变成红色
echo preg_replace("/([x20-x7f])/","1",$str);
?>

)

Example 2

代码如下

复制代码

$str = "之二宽阔的甘家口东#标签1#标签2 #标签3。#标签4,都发34 ￥xc,cvm , ￥12,dflksjf如何#标签5.x #tag6.cvxcv“";
preg_match_all('/#([a-zA-Z0-9x7f-xff]+)/', $str, $mat);
print_r($mat);

preg_match("/[x{00a5}x{ffe5}](d+)/u", $str, $mat);
print_r($mat);

The code is as follows

Copy code

$str = 'This is English';

//Turn Chinese into red

代码如下	复制代码
$str = "php编程"; if (preg_match("/^[x{4e00}-x{9fa5}]+$/u",$str)) { print("该字符串全部是中文"); } else { print("该字符串不全部是中文"); }

echo preg_replace("/([x80- xff].)/","1",$str);//Turn non-Chinese characters into redecho preg_replace("/([x20-x7f ])/","1",$str);?>

If the signature contains Chinese, English, numbers, etc., special processing is required for Chinese characters. Since PCRE does not support perl string processing escapes such as U P L, use hexadecimal or Unicode for processing. , an example is as follows:

The code is as follows	Copy code
$str = "Second Broad Ganjiakou East#tag1#tag2#tag3. #tag4, all sent $1234 ￥xc,cvm, ￥12,dflksjfHow to #tag5.x #tag6.cvxcv"";preg_match_all('/#([a-zA-Z0-9x7f-xff]+ )/', $str, $mat);print_r($mat);preg_match("/[x{00a5}x{ffe5}](d+)/u", $str, $mat);print_r($mat);

Finally I understood the regular expression matching under utf-8 encoding in php The final correct expression of Chinese characters——/^[x{4e00}-x{9fa5}]+$/u

The code is as follows	Copy code
$str = "php programming";if (preg_match( "/^[x{4e00}-x{9fa5}]+$/u",$str)) {print("The string is all in Chinese");} else {print ("This string is not all in Chinese");}

Example

The following regular expression for matching Chinese strings uses an array, and then uses for multiple times to print out all Chinese strings.
*/

$str_arr = array("iameverysorry",

The code is as follows

代码如下

复制代码

$str_arr = array(
"iameverysorry",
"快乐编程，快乐生活",
"php教程编程",
"1997年香港回归",
"英语学习abc",
"www.bkjia.com"
);

$patt_ch = chr(0xa1) . "-" . chr(0xff);

foreach ($str_arr as $str)
{
    echo "字符串'$str' 是";
    if (preg_match("/^[$patt_ch]+$/", $str))
    {
        echo "完全中文";
        echo "
";
        echo "
";
    }
    else
    {
        echo "非完全中文";
        echo "
";
        echo "
";
    }
}

Copy code

"Happy programming, happy life",
"php tutorial programming", "Hong Kong's return in 1997",

"English learning abc",

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