本文实例讲述了php截取中文字符串函数。分享给大家供大家参考。具体实现方法如下:
function substr_zh($string,$sublen,$start=0,$code='UTF-8'){
if($code=='UTF-8'){
$pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
preg_match_all($pa,$string,$t_string);
if(count($t_string[0])-$start > $sublen){
return join('',array_slice($t_string[0],$start,$sublen))."...";
//array_slice()在数组中根据条件取出一段值,参数(数组,开始位置,[长度])
}else{
return join('',array_slice($t_string[0],$start,$sublen));
}
}else{
$start = $start*2;
$sublen = $sublen*2;
$strlen = strlen($string);
$tmpstr = '';
for($i=0;$i if($i>$start && $i if(ord(substr($string,$i,1))>129){
//ord():返回字符串第一个字符的ASCII值
//substr():返回字符串的一部分
$tmpstr .= substr($string,$i,2);
}else{
$tmpstr .= substr($string,$i,1);
}
}
if(ord(substr($string,$i,1))>129){
$i++;
}
if(strlen($tmpstr) $tmpstr .= "...";
}
}
return $tmpstr;
}
}
$string ="顶置车顶起困境檲上盯协押畏奇才趄肯困楞右脚可爱有";
echo substr_zh($string,10,0,'gb2312');
?>
希望本文所述对大家的php程序设计有所帮助。

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