Determine whether the input is pure numbers, English, Chinese characters, etc.

You can easily know the structure of the string by using php's mb_strlen and strlen functions. Is it all in English, a mixture of English and Chinese, or pure Chinese characters. A brief description is as follows (above sample program) 1. If the character length returned by strlen is the same as the length calculated by mb_strlen based on the current encoding Zhizhi, it can be judged to be a pure English string. 2. If the character length returned by strlen is inconsistent with the length calculated by mb_strlen based on the current encoding, And the return value of strlen is the same as the return value of mb_strlen. If the remainder is 0, it can be judged to be a string of all Chinese characters. 3. If the character length returned by strlen is inconsistent with the length calculated by mb_strlen based on the current encoding, And the return value of strlen is not 0 after the remainder of the return value of mb_strlen, it can be judged to be a mixed string of English and Chinese.

/********
 Determine whether the input is pure numbers, English, Chinese characters, etc.


Using php's mb_strlen and strlen functions, you can easily know the composition of the string
 whether it is all English, mixed English and Chinese, or pure Chinese characters. A brief description is as follows (above sample program)
 1. If the character length returned by strlen is consistent with the length calculated by mb_strlen based on the current encoding, it can be judged to be a pure English string.
 2. If the character length returned by strlen is inconsistent with the length calculated by mb_strlen based on the current encoding,
 and the remainder of the return value of strlen and the return value of mb_strlen is 0, it can be judged to be a string of all Chinese characters.
 3. If the character length returned by strlen is inconsistent with the length calculated by mb_strlen based on the current encoding,
 and the return value of strlen is not 0 after the remainder of the return value of mb_strlen, it can be judged to be a mixed English-Chinese string.
*
* ****************/
$str = "456abc";
$x = mb_strlen($str,'gb2312');
$y = strlen($str); echo "------456abc----";
echo "$x".'';
echo "$y".'';
$str = "456I am Chinese abc";
$x = mb_strlen($str,'gb2312');
$y = strlen($str);
echo "----- -456 I am Chinese abc----";
echo "$x".''; echo "$y".'';
$str = "I am Chinese and I love my motherland";
$x = mb_strlen($str,'gb2312');
$y = strlen($str);
echo "------I am China I love my motherland----"; echo "$x".'';
echo "$y".''; $str = "I";
$x = mb_strlen($str,'gb2312');
$y = strlen($str);
echo "------I----"; echo "$x".'';
echo "$y".'';
$str = "我ab";
$x = mb_strlen($str,' gb2312');
$y = strlen($str);
echo "------I ab----"; echo "$x".' '; echo "$y".'';
?>