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php中文字符串截取方法实例总结 - 站长搜索
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php中文字符串截取方法实例总结

PHP 2014-12-10 05:33:05 转载来源: 网络整理/侵权必删

本文为大家讲解的是php中文字符串截取方法实例,针对常见的字符串截取函数进行了分析比对,并给出了一个完整实例来解决PHP中文字符串截取问题,感兴趣的朋友可以参考下 用PHP函数substr截取中文字符可能会出现乱码,主要是substr可能硬生生的将一个中文字符“锯”成两半。 解决办法如下: 1、使用mbstring扩展库的mb_substr截取就不会出现乱码了

本文为大家讲解的是php中文字符串截取方法实例,针对常见的字符串截取函数进行了分析比对,并给出了一个完整实例来解决PHP中文字符串截取问题,感兴趣的朋友可以参考下

用PHP函数substr截取中文字符可能会出现乱码,主要是substr可能硬生生的将一个中文字符“锯”成两半。

解决办法如下:

1、使用mbstring扩展库的mb_substr截取就不会出现乱码了。

2、自己书写截取函数,但效率不如用mbstring扩展库来得高。

3、如果仅是为了输出截取的串,可用如下方式实现:substr($str, 0, 30).chr(0)。

substr()函数可以分割文字,但要分割的文字如果包括中文字符往往会遇到问题,这时可以用mb_substr()/mb_strcut这个函数,mb_substr()/mb_strcut的用法与substr()相似,只是在mb_substr()/mb_strcut最后要加入多一个参数,以设定字符串的编码,但是一般的服务器都没打开php_mbstring.dll,需要在php.ini在把php_mbstring.dll打开。

举2个例子:

1 mb_substr示例

<?php
echo mb_substr('这样一来我的字符串就不会有乱码^_^', 0, 7, 'utf-8');
//输出:这样一来我的字
?>

2 mb_strcut示例

<?php
echo mb_strcut('这样一来我的字符串就不会有乱码^_^', 0, 7, 'utf-8');
//输出:这样一
?>

通过上述示例可见mb_substr是按字来切分字符,而mb_strcut是按字节来切分字符,但是都不会产生半个字符的现象。

PHP实现中文字串截取无乱码的方法:

<?php
//此函数完成带汉字的字符串取串
function substr_CN($str,$mylen){ 
$len=strlen($str);
$content='';
$count=0;
for($i=0;$i<$len;$i++){
if(ord(substr($str,$i,1))>127){
$content.=substr($str,$i,2);
$i++; 
}else{
$content.=substr($str,$i,1);
}
if(++$count==$mylen){
break;
}
}
echo $content;
}

$str="34中华人民共和国56";
substr_CN($str,3);//输出34中
?>


标签: php 中文 字符串 截取 方法 实例 总结


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