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thinkphp截取中文字符串的方法

Jun 13, 2016 am 09:36 AM
thinkphp intercept

ThinkPHP 3.1.3貌似没有内置的截取中文字符串的方法,找了半天没找到,下面作者自己加了一个截取中文字符串的函数,具体代码如下,有需要的朋友可以参考下。

以下代码加在项目所在目录的Common目录下的common.php文件里面的,比如作者的就是www/Common/common.php文件,当然你也可以直接加到thinkphp的Common/common.php文件里面,这样就所有的项目都可以使用了。

function truncate_cn($string,$length=0,$ellipsis='…',$start=0){
	$string=strip_tags($string);
	$string=preg_replace('/\n/is','',$string);
	//$string=preg_replace('/ | /is','',$string);//清除字符串中的空格
	$string=preg_replace('/ /is','',$string);
	preg_match_all("/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/",$string,$string);
	if(is_array($string)&&!empty($string[0])){
		$string=implode('',$string[0]);
		if(strlen($string)<$start+1){
			return '';
		}
		preg_match_all("/./su",$string,$ar);
		$string2='';
		$tstr='';
		//www.phpernote.com
		for($i=0;isset($ar[0][$i]);$i++){
			if(strlen($tstr)<$start){
				$tstr.=$ar[0][$i];
			}else{
				if(strlen($string2)<$length+strlen($ar[0][$i])){
					$string2.=$ar[0][$i];
				}else{
					break;
				}
			}
		}
		return $string==$string2?$string2:$string2.$ellipsis;
	}else{
		$string='';
	}
	return $string;
}
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在thinkphp的模板中用法如下:

{$info.subject|truncate_cn=40,'',0}
Copy after login

意思是截取$info['subject']字符串,从第0个字符串开始截取长度为40的字符串,截取字符串长度小于原字符串长度的将什么都不显示,默认是...的,其实后面两个参数是可选的。

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