自动换行

来源：互联网发布：有趣的电子产品知乎编辑：程序博客网时间：2024/05/16 19:35

<?php
define('lenth',64);
$word="sdfdsjkh sdfjhjjfgjhdf sdfsdfdsfsf sdfsdfsdf sdkjf sdkjh sdfjh sdkf skdj sdkj kjsd kjsdfkj sdf kdsjfh k sdkj k sdkfj dsfhjk sdkjf sdkj sdkjf sdkfj sdfkj sdkjf sdkjf ,skdjfh,..sdkjfh sdkjf ..sdfjhkj :;fdskj dsfjh sdfjsdfjh sdfkjhsd fkjsdfhk j. sdjfkl/ sdfkj sdflkj sdfjkl()sdf lkds fj+_+_f lkjfds kljlds f^%@$#^% ";
$neww=substr($word,0,lenth) ;

while($neww)
{
      if($neww{lenth-1}==" ")
      {
          echo $neww."<br>";
          $word=substr($word,lenth);
          $neww=substr($word,0,lenth);
      }
      else
      {
          if($word{lenth}!=" ")
          {
              $i=0;
              while($neww{$i})
              {
                 if($neww{$i}==" ")
                 {
                    $j=$i;

                 }
                 $i++;
              }

              $neww=substr($word,0,$j+1);
              echo $neww."<br>";
              $word=substr($word,$j+1);
              $neww=substr($word,0,lenth) ;
          }
          else
          {
           echo $neww."<br>";
           $word=substr($word,lenth);
           $neww=substr($word,0,lenth) ;
          }
      }
}