php 判断中文,英文,数字
$str='asb天水市12';
if (preg_match("/^[\x7f-\xff]+$/", $str)){
echo '全部是汉字';
}else {
echo '不全是汉字';
}
/**
PHP自带的判断是否是中文,
eregi('[^\x00-\x7F]', $str ) //中文
eregi('[0-9]', $str) //数字
eregi('[a-zA-Z]', $str)//英文
*/
if (eregi('[^\x00-\x7F]', $str) || eregi('[0-9]', $str) || eregi('[a-zA-Z]', $str)){
echo '你输入的为中英文数字的并合体哦!'.'
';
echo "长度:".strlen($str);
}
/ **
下面这两个方法是用来判断是否是英文汉字和数字组成的字符串,
或者全部是中文组成的字符串 用的变量$str还是本文开头的变量
*/
if (preg_match_all("/^([\x81-\xfe][\x40-\xfe])+$/", $str, $match)) {
echo '全部是汉字';
} else {
echo '不全是汉字';
}
if (preg_match("/([\x81-\xfe][\x40-\xfe])/", $str, $match)) {
echo '含有汉字';
} else {
echo '不含有汉字';
}
/**
此为js方法,判断了一个汉字占两个字节,一个中文或数字占一个,使用编码为UTF-8
*/
<script><br> </script>
var leng = {};
var value = document.forms[0].name.value;
jmz.GetLength = function(str) {
var realLength = 0, len = str.length, charCode = -1;
for (var i = 0; i
charCode = str.charCodeAt(i);
if (charCode >= 0 && charCode
else realLength +=2;
}
return realLength;
};
alert(leng.GetLength(value))
function checkStr($str){ $output=''; $a=ereg('['.chr(0xa1).'-'.chr(0xff).']', $str); $b=ereg('[0-9]', $str); $c=ereg('[a-zA-Z]', $str); if($a && $b && $c){ $output='汉字数字英文的混合字符串';} elseif($a && $b && !$c){ $output='汉字数字的混合字符串';} elseif($a && !$b && $c){ $output='汉字英文的混合字符串';} elseif(!$a && $b && $c){ $output='数字英文的混合字符串';} elseif($a && !$b && !$c){ $output='纯汉字';} elseif(!$a && $b && !$c){ $output='纯数字';} elseif(!$a && !$b && $c){ $output='纯英文';} return $output; } echo checkStr('5爱u');

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PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

PHP is not dying, but constantly adapting and evolving. 1) PHP has undergone multiple version iterations since 1994 to adapt to new technology trends. 2) It is currently widely used in e-commerce, content management systems and other fields. 3) PHP8 introduces JIT compiler and other functions to improve performance and modernization. 4) Use OPcache and follow PSR-12 standards to optimize performance and code quality.

The future of PHP will be achieved by adapting to new technology trends and introducing innovative features: 1) Adapting to cloud computing, containerization and microservice architectures, supporting Docker and Kubernetes; 2) introducing JIT compilers and enumeration types to improve performance and data processing efficiency; 3) Continuously optimize performance and promote best practices.


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