如何顯示有限的話在PHP

Question

可能重複：
split a string PHP

我在PHP.i新手有一個字符串，如：

$string="Once the Flash message has been set, I redirect the user to the form or a list of results. That is needed in order to get the flash working (you cannot just load the view in this case… well, you can but this method will not work in such case). When comparing $result TRUE or FALSE, please notice the different value for type. I am using type=message for successful messages, and type=error for error mesages."; 

現在我想只顯示15或20這些有限的詞。但我該怎麼做呢？

Answer 1

function limit_words($string, $word_limit) 
{ 
    $words = explode(" ",$string); 
    return implode(" ", array_splice($words, 0, $word_limit)); 
} 

$content = 'Once the Flash message has been set, I redirect the user to the form or a list of results. That is needed in order to get the flash working (you cannot just load the view in this case… well, you can but this method will not work in such case). When comparing $result TRUE or FALSE, please notice the different value for type. I am using type=message for successful messages, and type=error for error mesages.' ; 

echo limit_words($content,20); 

Answer 2

嘗試：

$string = "Once the Flash message ..."; 
$words = array_slice(explode(' ', $string), 0, 15); 
$output = implode(' ', $words); 

Answer 3

這樣拆分文字字符串，那麼你提取所需的量：

function trimWords($string, $limit = 15) 
{ 

    $words = explode(' ', $string); 
    return implode(' ', array_slice($words, 0, $limit)); 

} 

Answer 4

我創建了一個功能前段時間此：

<?php 
    /** 
    * @param string $str Original string 
    * @param int $length Max length 
    * @param string $append String that will be appended if the original string exceeds $length 
    * @return string 
    */ 
    function str_truncate_words($str, $length, $append = '') { 
     $str2 = preg_replace('/\\s\\s+/', ' ', $str); //remove extra whitespace 
     $words = explode(' ', $str2); 
     if (($length > 0) && (count($words) > $length)) { 
      return implode(' ', array_slice($words, 0, $length)) . $append; 
     }else 
      return $str; 
    } 

?>