與PDO bindParam /值

我試圖從數據庫中獲取的查詢，但是，我有bindParam(:name)值不被束縛的問題，當我回聲$sql和print_r($stmtTwo)的WHERE條款規定WHERE :name，而不是從字符串$wherefinal。與PDO bindParam /值

我的代碼是：

$sql= "SELECT Species.Species_ID 
    FROM Species 
    JOIN ( 
     SELECT Species.Species_ID, COUNT(*) AS mynum 
     FROM Species_Opt LEFT JOIN Species ON (Species.Species_ID = Species_Opt.SO_Species_ID) 
     WHERE :name 
     GROUP BY SO_Species_ID HAVING mynum = 6 
     ) AS mytable ON Species.Species_ID = mytable.Species_ID"; 
$stmtTwo = $pdo->prepare($sql); 
$stmtTwo->bindParam(':name', $wherefinal); 
$stmtTwo->execute();

與$wherefinal SQL語句之前被定義，被定義爲：

$where = ""; 
foreach ($_POST as $k => $v){ 
    $where .= "(Species_Opt.SO_Option_ID = $v) OR "; 
}; 
$wherefinal = substr($where, 0, strrpos($where, " OR "));

而且迴盪的時候，$wherefinal顯示：

(Species_Opt.SO_Option_ID = 4) OR (Species_Opt.SO_Option_ID = 12) OR (Species_Opt.SO_Option_ID = 17) OR (Species_Opt.SO_Option_ID = 20) OR (Species_Opt.SO_Option_ID = 21) OR (Species_Opt.SO_Option_ID = 32)

$v來自單選按鈕的值m是通過不同的SQL語句和smarty生成的表單。

來源

2014-12-02 user2861154

簡單，你不能綁定列'WHERE：name' – 2014-12-02 02:37:55

@ Fred-ii-，我相信O P至少知道它不起作用，這就是爲什麼他問，而你的重複鏈接無助於解決他的問題。這個鏈接應該是一個更好的建議：http://stackoverflow.com/questions/920353/can-i-bind-an-array-to-an-in-condition，因爲他的問題可以縮短到'Species_Opt.SO_Option_ID IN （？，？，？，....）' – invisal 2014-12-02 02:46:34

@invisal我已重新打開它，但是如果其他人關閉了[基於您的鏈接]（http://stackoverflow.com/q/920353/）的問題，另一個重複，它會超出我的控制。 – 2014-12-02 02:48:38

第一件事首先，你需要建立你的佔位符部分

$placeholder = str_repeat('?,', count($_POST) - 1) . '?';

然後用它來構建一個完整的SQL查詢

$sql= "SELECT Species.Species_ID 
     FROM Species 
     JOIN ( 
      SELECT Species.Species_ID, COUNT(*) AS mynum 
      FROM Species_Opt LEFT JOIN Species ON 
       (Species.Species_ID = Species_Opt.SO_Species_ID) 
      WHERE Species_Opt.SO_Option_ID IN ({$placeholder}) 
     GROUP BY SO_Species_ID HAVING mynum = 6 
     ) AS mytable ON Species.Species_ID = mytable.Species_ID";

之後，你可以將值綁定到每個佔位符

$sh = $pdo->prepare($sql); 

$i = 1; 
foreach($_POST as $value) { 
    $sh->bindValue($i, $value); $i++; 
} 
$sh->execute();

來源

2014-12-02 04:37:36 invisal

非常感謝 – user2861154 2014-12-02 04:56:28

與PDO bindParam /值

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