PHP determines whether it is Chinese/English/numeric sample code

PHP determines whether it is Chinese/English/numeric sample code_PHP tutorial
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Release： 2016-07-21 16:13:11
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Copy code The code is as follows:
 
$str='asbTianshui City 12'; 

if (preg_match(" /^[x7f-xff]+$/", $str)){ 
echo 'All are Chinese characters'; 
}else { 
echo 'Not all are Chinese characters'; 
} 
 /**
PHP comes with the ability to determine whether it is Chinese, 
eregi('[^x00-x7F]', $str ) //Chinese
eregi('[0-9]', $str) // Number
eregi('[a-zA-Z]', $str)//English
*/ 
if (eregi('[^x00-x7F]', $str) || eregi('[0-9]', $str) || eregi('[a- zA-Z]', $str)){ 
echo 'What you entered is a combination of Chinese and English numbers!'.'
'; 
echo "Length:".strlen($str ); 
} 
/ ** 

The following two methods are used to determine whether it is a string composed of English characters and numbers, 
or a string composed entirely of Chinese characters. The variable $str is still the variable at the beginning of this article 

*/ 

if (preg_match_all("/^([x81-xfe][x40-xfe])+$/", $str, $match)) { 
echo 'All are Chinese characters'; 
} else { 
echo 'Not all are Chinese characters'; 
} 

if (preg_match("/([x81 -xfe][x40-xfe])/", $str, $match)) { 
echo 'Contains Chinese characters'; 
} else { 
echo 'Does not contain Chinese characters'; 
} 

/**

This is a js method. It determines that a Chinese character occupies two bytes, and a Chinese character or number occupies one. The encoding is UTF-8 

*/ 

<script> <br><br>var leng = {}; <br><br>var value = document.forms[0] .name.value; <br>jmz.GetLength = function(str) { <br>var realLength = 0, len = str.length, charCode = -1; <br>for (var i = 0; i < len ; i++) { <BR>charCode = str.charCodeAt(i); <BR>if (charCode >= 0 && charCode <= 128) realLength += 1; <BR>else realLength +=2; <BR> } <BR>return realLength; <BR>}; <br><br>alert(leng.GetLength(value)) <br><br></script> 

function checkStr($str) { 
$output=''; 
$a=ereg('['.chr(0xa1).'-'.chr(0xff).']', $str); 
$b= ereg('[0-9]', $str); 
$c=ereg('[a-zA-Z]', $str); 
if($a && $b && $c) { $output='A mixed string of Chinese characters, numbers and English';} 
elseif($a && $b && !$c){ $output='A mixed string of Chinese characters and numbers';} 
elseif($ a && !$b && $c){ $output='A mixed string of Chinese characters and English';} 
elseif(!$a && $b && $c){ $output='A mixed string of numbers and English' ;} 
elseif($a && !$b && !$c){ $output='Pure Chinese characters';} 
elseif(!$a && $b && !$c){ $output='Pure Number';} 
elseif(!$a && !$b && $c){ $output='Pure English';} 
return $output; 
} 

echo checkStr( '5爱u'); 