FETCH_ASSOC PDO連續循環

我是PDO的新手，我正在從MySQLi轉換到它，因爲我一直在使用我的網絡空間。FETCH_ASSOC PDO連續循環

我正在嘗試使用FETCH_ASSOC來遍歷結果以獲取由我的查詢生成的單個記錄，但是，循環永遠不會結束，並不斷重複結果中的第一條記錄。有什麼建議麼？

<?php 
$Request = databaseManager::getDB()->prepareSQL("SELECT Username, 2Wins, 2Loses, (2Wins/(2Wins+2Loses))*100 as WinRate FROM tblUsers ORDER BY 4 DESC"); 
//$LstResults = $Request->fetchAll(); 

while($LstResults = $Request->fetchArray()){ 
    if($LstResults["WinRate"] >= 50){ ?> 
     <tr> 
     <td><?php echo $LstResults["Username"]; ?></td>         
     <td> 
      <div class="progress progress-xs"> 
       <div class="progress-bar progress-bar-success" style="width: <?php echo $LstResults["WinRate"]; ?>%"></div> 
      </div> 
     </td> 
     <td><span class="badge bg-green"><?php echo intval($LstResults["WinRate"]); ?></span></td> 
     </tr> 
    <?php } 
} ?>

類

class databaseManager{ 
    protected $dbHND; 
    protected $currentSQLStatement; 
    protected $bind; 

    private $StrDBHost='localhost'; 
    private $StrDBPort = "3306"; 
    private $StrDBUser='thomassm_sqlogin'; 
    private $StrDBPass='password'; 
    private $StrDBName='thomassm_CadetPortal'; 

    public function __construct(){ 
     if ($this->dbHND = new PDO ('mysql:host=' . $this->StrDBHost . ';dbname=' . $this->StrDBName . ';port=' . $this->StrDBPort, $this->StrDBUser, $this->StrDBPass)){ 
      $this->bind = null; 
     } 
     else{ 
      return false; 
     } 
    } 

    static public function getDB(){ 
     $tmpInstance = new self(); 
     return $tmpInstance; 
    } 

    public function prepareSQL($sqlQueryString = null){ 
     if ($sqlQueryString === null){ 
      $this->currentSQLStatement === false; 
      return false; 
     } 
     elseif (is_array ($sqlQueryString)){ 
      if ($this->currentSQLStatement = $this->dbHND->prepare ($sqlQueryString [0])){ 
       $this->bind = $sqlQueryString [1]; 
       return $this; 
      } 
      else{ 
       throw new \Exception ("Could not prepare SQL Statement, " . print_r ($this->dbHND->errorInfo())); 
       return false; 
      } 
     } 
     else{ 
      if ($this->currentSQLStatement = $this->dbHND->prepare ($sqlQueryString)){ 
       return $this; 
      } 
      else{ 
       throw new \Exception ("Could not prepare SQL Statement, " . print_r ($this->dbHND->errorInfo())); 
       return false; 
      } 
     } 
    } 

    public function fetchArray(){ 
     if (! $this->currentSQLStatement){ 
      return false; 
     } 
     elseif ($this->bind != null){ 
      $this->currentSQLStatement->execute ($this->bind); 
      return $this->currentSQLStatement->fetch (PDO::FETCH_ASSOC); 
     } 
     else{ 
      $this->currentSQLStatement->execute(); 
      return $this->currentSQLStatement->fetch (PDO::FETCH_ASSOC); 
     } 
    } 

public function fetchAll(){ 
    if (! $this->currentSQLStatement){ 
     return false; 
    } 
    elseif ($this->bind != null){ 
     $this->currentSQLStatement->execute ($this->bind); 
     return $this->currentSQLStatement->fetchAll (PDO::FETCH_ASSOC); 
    } 
    else{ 
     $this->currentSQLStatement->execute(); 
     return $this->currentSQLStatement->fetchAll (PDO::FETCH_ASSOC); 
    } 
} 
}

來源

2017-04-15 Thomas Smyth

您執行每取之前，所以你每次從頭開始。 –

@KIKOSoftware是否應該從類中移除執行調用，然後在我之前使用過的地方總是執行'...-> execute（） - > fetchArray（）;' –

您只需執行一次查詢，然後就可以獲取所有行。我會在你的'prepareSQL（）'方法中放入execute，然後調用'prepareAndExecuteSQL（）'方法。 –

由於KIKO軟件在評論的問題時說，我只需要運行執行一次，否則它會重置循環的次數。我已刪除從fetchArray代碼執行和現在要求fetchArray之前調用它，就像這樣：

public function fetchArray(){ 
    if (! $this->currentSQLStatement){ 
     return false; 
    } 
    else{ 
     return $this->currentSQLStatement->fetch (PDO::FETCH_ASSOC); 
    } 
}

來源

2017-04-26 09:36:39

FETCH_ASSOC PDO連續循環

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