Function to control string output in PHP

// A function in php that controls string output (Chinese and English), how many words are displayed in each line, to avoid the influence of English
// $str string
// $len The number of characters displayed in each line (Chinese characters × 2)


function rep($str,$len)

{
$strlen=strlen($str);
$i=0;
$finstr="";
$pos=0;
​​​
While($i<$strlen)
                                                            $s1=substr($str,$i,1);
         $s2=ord($s1);
If($s2>0xa0){
​​​​
            $finstr.=substr($str,$i,2);
             $pos+=2;
             $i+=2;
​​​​
        }else{
                                      switch($s2){
case 13:
                  $finstr.="
";
                $pos=0;
                                                          break case 10:
                 $pos=0;
                                                   break case 32;
                     $finstr.=" ";
                     $pos++;
                  break;
                   default:                                                 $finstr.=htmlspecialchars($s1);                                                            $pos++;                                                                                                        break                                                                                                                               $i++;                                     ​​​​​
           } //if
​​​
If($pos>=$len){
              $finstr.="
";
             $pos=0;
}




                    //while
Return $finstr;
}

The above has introduced the functions that control string output in PHP, including the content of controlling string functions. I hope it will be helpful to friends who are interested in PHP tutorials.