添加...如果字符串太長PHP

Question

我在我的MySQL數據庫中有一個描述字段，並且我在兩個不同的頁面上訪問數據庫，其中一個頁面顯示整個字段，但另一方面，我只想顯示前50個字符。如果描述字段中的字符串少於50個字符，則不會顯示...，但如果不顯示，我將在前50個字符後顯示...。

例（完全字符串）：

Hello, this is the first example, where I am going to have a string that is over 50 characters and is super long, I don't know how long maybe around 1000 characters. Anyway this should be over 50 characters now ... 

〔實施例2（第50位）：

Hello, this is the first example, where I am going ... 

Answer 1

這樣做的PHP的方法很簡單：

$out = strlen($in) > 50 ? substr($in,0,50)."..." : $in; 

但你可以用這個CSS實現更好的效果：

.ellipsis { 
    overflow: hidden; 
    white-space: nowrap; 
    text-overflow: ellipsis; 
} 

現在，假設元素具有固定的寬度，瀏覽器將自動斷開併爲您添加...。

Answer 2

if (strlen($string) <=50) { 
    echo $string; 
} else { 
    echo substr($string, 0, 50) . '...'; 
} 

Answer 3

<?php 
function truncate($string, $length, $stopanywhere=false) { 
    //truncates a string to a certain char length, stopping on a word if not specified otherwise. 
    if (strlen($string) > $length) { 
     //limit hit! 
     $string = substr($string,0,($length -3)); 
     if ($stopanywhere) { 
      //stop anywhere 
      $string .= '...'; 
     } else{ 
      //stop on a word. 
      $string = substr($string,0,strrpos($string,' ')).'...'; 
     } 
    } 
    return $string; 
} 
?> 

我用上面的代碼片斷許多-A-倍..

Answer 4

<?php 
$string = 'This is your string'; 

if(strlen($string) > 50) { 
    $string = substr($string, 0, 50) . '...'; 
} 

就是這樣。

Answer 5

使用wordwrap()截斷字串沒有打破的話如果字符串的長度超過50個字符長，只是在末尾添加...：

$str = $input; 
if(strlen($input) > 50) { 
    $str = explode("\n", wordwrap($input, 50)); 
    $str = $str[0] . '...'; 
} 

echo $str; 

否則，使用該做substr($input, 0, 50);將打破單詞的解決方案。

Answer 6

$string = "Hello, this is the first example, where I am going to have a string that is over 50 characters and is super long, I don't know how long maybe around 1000 characters. Anyway this should be over 50 characters know..."; 

if(strlen($string) >= 50) 
{ 
    echo substr($string, 50); //prints everything after 50th character 
    echo substr($string, 0, 50); //prints everything before 50th character 
} 

Answer 7

您可以使用str_split()這個

$str = "Hello, this is the first example, where I am going to have a string that is over 50 characters and is super long, I don't know how long maybe around 1000 characters. Anyway this should be over 50 characters know..."; 
$split = str_split($str, 50); 
$final = $split[0] . "..."; 
echo $final; 

Answer 8

您可以也以此方式達到理想的裝飾：

mb_strimwidth("Hello World", 0, 10, "..."); 

其中：

• Hello World：字符串修剪。
• 0：字符串開始處的字符數。
• 10：修剪的字符串的長度。
• ...：在修剪的字符串末尾添加的字符串。

這將返回Hello W...。

請注意，10是截斷的字符串+添加的字符串的長度！

文檔：http://php.net/manual/en/function.mb-strimwidth.php

Answer 9

我用我的網站上該解決方案。如果$ str比$ max短，它將保持不變。如果$ str在$ max字符中沒有空格，它將在$ max位置被殘酷地剪切。否則在最後一個單詞之後將添加3個點。

function short_str($str, $max = 50) { 
    $str = trim($str); 
    if (strlen($str) > $max) { 
     $s_pos = strpos($str, ' '); 
     $cut = $s_pos === false || $s_pos > $max; 
     $str = wordwrap($str, $max, ';;', $cut); 
     $str = explode(';;', $str); 
     $str = $str[0] . '...'; 
    } 
    return $str; 
} 

Answer 10

這將返回給定的字符串基於WORD省略號數而不是字符：

<?php 
/** 
* Return an elipsis given a string and a number of words 
*/ 
function elipsis ($text, $words = 30) { 
    // Check if string has more than X words 
    if (str_word_count($text) > $words) { 

     // Extract first X words from string 
     preg_match("/(?:[^\s,\.;\?\!]+(?:[\s,\.;\?\!]+|$)){0,$words}/", $text, $matches); 
     $text = trim($matches[0]); 

     // Let's check if it ends in a comma or a dot. 
     if (substr($text, -1) == ',') { 
      // If it's a comma, let's remove it and add a ellipsis 
      $text = rtrim($text, ','); 
      $text .= '...'; 
     } else if (substr($text, -1) == '.') { 
      // If it's a dot, let's remove it and add a ellipsis (optional) 
      $text = rtrim($text, '.'); 
      $text .= '...'; 
     } else { 
      // Doesn't end in dot or comma, just adding ellipsis here 
      $text .= '...'; 
     } 
    } 
    // Returns "ellipsed" text, or just the string, if it's less than X words wide. 
    return $text; 
} 

$description = 'Lorem ipsum dolor sit amet, consectetur adipisicing elit. Quibusdam ut placeat consequuntur pariatur iure eum ducimus quasi perferendis, laborum obcaecati iusto ullam expedita excepturi debitis nisi deserunt fugiat velit assumenda. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Incidunt, blanditiis nostrum. Nostrum cumque non rerum ducimus voluptas officia tempore modi, nulla nisi illum, voluptates dolor sapiente ut iusto earum. Esse? Lorem ipsum dolor sit amet, consectetur adipisicing elit. A eligendi perspiciatis natus autem. Necessitatibus eligendi doloribus corporis quia, quas laboriosam. Beatae repellat dolor alias. Perferendis, distinctio, laudantium? Dolorum, veniam, amet!'; 

echo elipsis($description, 30); 
?>