從SQL數組中添加字符串長度

Question

我想從插入的URL中加起來的字符長度。我已經從數據庫中的數據庫中抓取了所有選定的URL，並試圖將它們添加到foreach函數中。

function countLen($email) { 

    $countLen = mysql_query("SELECT url FROM urls WHERE user='$email'"); 
    $resultLen = mysql_result($countLen, 0); 

    foreach($resultLen as &$string) { 


     $length = strlen($string); 
     $totallen = ($totallen + $length); 

     return $totallen; 




    } 





} 

Answer 1

你可能只是做這一切的總結在SQL：

function countLen($email) 
{ 
    $res = mysql_query("SELECT SUM(LENGTH(url)) as 'sum' FROM urls WHERE user='$email'"); 
    return current(mysql_fetch_array($res)); 
} 

Answer 2

嘗試：

$total = 0; 

$res = mysql_query("SELECT url FROM urls WHERE user='$email'"); 
while($row = mysql_fetch_assoc($res)) 
{ 
    $total += strlen($row['url']); 
} 

Answer 3

回報應該出的圈..像

function countLen($email) { 

    $countLen = mysql_query("SELECT url FROM urls WHERE user='$email'"); 
    $resultLen = mysql_result($countLen, 0); 
    $totallen = 0; 
    foreach($resultLen as &$string) { 
    $length = strlen($string); 
    $totallen = ($length + $totallen); 
    } 
    return $totallen; 
}