php简单截取字符串代码示例

本文实例讲述了php简单截取字符串的方法。分享给大家供大家参考，具体如下：//截取摘要p

本文实例讲述了php简单截取字符串的方法。分享给大家供大家参考，具体如下：

//截取摘要
public static function mbsubstr($str){
 $strleng = mb_strlen($str,"utf8");
 $mbstr = mb_substr($str,0,140,'utf8');
 $strdstr = mb_substr($str,140,$strleng,'utf8');
 $strlengs = mb_strlen($strdstr,'utf8');
 $strc = "";
 for($i=0;$i<$strlengs;$i++){
 $strn = mb_substr($strdstr,$i,1,'utf8');
 if($strn == "。" || $strn == "？" || $strn == "！"){
 break;
 }
 $strc .= $strn;
 }
 $strd = $mbstr.$strc;
 //echo $strleng."@".mb_strlen($strd,'utf8')."@".$strd."<br>";
 return $strd;
}