PHP如何切串不破壞

Question

正如標題所說我想剪一個字符串，不違反任何文字或HTML標籤的任何文字或HTML標籤，現在我發現這個功能，這種種的HTML標籤問題出（由我自己稍微修改）

function substrhtml($str,$start,$len){ 

    $str_clean = substr(strip_tags($str),$start,$len); 

    if(preg_match_all('/\<[^>]+>/is',$str,$matches,PREG_OFFSET_CAPTURE)){ 

     for($i=0;$i<count($matches[0]);$i++){ 

      if($matches[0][$i][1] < $len){ 

       $str_clean = substr($str_clean,0,$matches[0][$i][1]) . $matches[0][$i][0] . substr($str_clean,$matches[0][$i][1]); 

      }else if(preg_match('/\<[^>]+>$/is',$matches[0][$i][0])){ 

       $str_clean = substr($str_clean,0,$matches[0][$i][1]) . $matches[0][$i][0] . substr($str_clean,$matches[0][$i][1]); 

       break; 

      } 

     } 

     return $str_clean; 

    }else{ 

     return substr($str,$start,$len); 

    } 

} 

Source

，但它仍然減少了一半中旬句話，我不希望發生的事情，對任何想法如何排序呢？

與往常一樣，任何幫助表示感謝，並提前致謝。

Answer 1

字符串拆分雖然尊重單詞可以使用wordwrap()完成。

Answer 2

試試這個：

function substrhtml($str,$start,$len){ 

    $str_clean = substr(strip_tags($str),$start,$len); 
    $pos = strrpos($str_clean, " "); 
    if($pos === false) { 
     $str_clean = substr(strip_tags($str),$start,$len); 
     }else 
     $str_clean = substr(strip_tags($str),$start,$pos); 

    if(preg_match_all('/\<[^>]+>/is',$str,$matches,PREG_OFFSET_CAPTURE)){ 

     for($i=0;$i<count($matches[0]);$i++){ 

      if($matches[0][$i][1] < $len){ 

       $str_clean = substr($str_clean,0,$matches[0][$i][1]) . $matches[0][$i][0] . substr($str_clean,$matches[0][$i][1]); 

      }else if(preg_match('/\<[^>]+>$/is',$matches[0][$i][0])){ 

       $str_clean = substr($str_clean,0,$matches[0][$i][1]) . $matches[0][$i][0] . substr($str_clean,$matches[0][$i][1]); 

       break; 

      } 

     } 

     return $str_clean; 

    }else{ 
     $string = substr($str,$start,$len); 
     $pos = strrpos($string, " "); 
     if($pos === false) { 
      return substr($str,$start,$len); 
     } 
      return substr($str,$start,$pos); 

    } 

} 
$string = '<h1>How to cut the string without breaking any words</h1>'; 
echo substrhtml($string,0,28); 
?> 

Answer 3

<?php 

$string = 'When one thinks of luxury travel throughout the Mediterranean, a handful of destinations are bound to be at the top of the list, destinations like the French Riviera, the Grecian Islands, or the Italian coastline.'; 

echo current(explode('::BR::', wordwrap($string, 20, '::BR::'))); 
?>