PHP PDO更新錯誤：綁定變量的數量與令牌數量不匹配

Question

我在更新現有數據庫記錄時遇到問題。我一直得到PDOException: SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens。

我的假設是，這意味着sql字符串中佔位符的數量（例如:variable）與綁定元素的數量/名稱不匹配。然而，我不能看到我的問題是：

// arrays for text and numeric form data 
$numfield_names = array("activeTime", "totalTime", "servings"); 
$textfield_names = array("activeTimeDesc", "totalTimeDesc", "yield"); 

// get record id 
$rid = filter_input(INPUT_GET, 'rid', FILTER_SANITIZE_NUMBER_INT); 

// get text & num fields 
$textFields = array(); 
$numFields = array(); 
foreach($textfield_names as $n){ 
    $textFields[$n] = filter_input(INPUT_GET, $n, FILTER_SANITIZE_STRING); } 
foreach($numfield_names as $n){ 
    $numFields[$n] = filter_input(INPUT_GET, $n, FILTER_SANITIZE_NUMBER_INT); } 

try{ 
    include "dbConnect.php"; 

    // update recipe data 
    $recipeSet = array(); 
    $recipeData = array('id'=>$rid); 
    $recipeFields = array_merge($numFields, $textFields); 
    $recipeFields['id'] = $rid; 
    foreach($numFields as $field => $val){ 
    $recipeSet[] = "`$field`=:$field"; 
    $recipeData[$field] = $val; 
    } 
    foreach($textFields as $field => $val){ 
    $recipeSet[] = "`$field`=':$field'"; 
    $recipeData[$field] = $val; 
    } 

    print_r($numFields); 
    print_r($textFields); 

    $recipeSetStr = trim(implode(',', $recipeSet) , ','); 
    $sql = "UPDATE `recipes` SET " . $recipeSetStr . " WHERE `id`=:id"; 

    print_r($sql); 

    $stmt = $conn->prepare($sql); 
    $stmt->bindValue(":activeTime", $recipeData['activeTime']); 
    $stmt->bindValue(":totalTime", $recipeData['totalTime']); 
    $stmt->bindValue(":servings", $recipeData['servings']); 
    $stmt->bindValue(":activeTimeDesc", $recipeData['activeTimeDesc']); 
    $stmt->bindValue(":totalTimeDesc", $recipeData['totalTimeDesc']); 
    $stmt->bindValue(":yield", $recipeData['yield']); 
    $stmt->bindValue(":id", $recipeData['id']); 
    $stmt->execute(); 

} catch (PDOException $e) { 
    // return error - I'm only hitting this... 
    echo $e->xdebug_message; 
} 

輸出如下：

Array ( 
[activeTime] => 10 
[totalTime] => 10 
[servings] => 32 
) 

Array ( 
[activeTimeDesc] => 10 minutes 
[totalTimeDesc] => 10 minutes (plus 1 day to make yogurt cheese) 
[yield] => 2 cups 
) 

UPDATE `recipes` SET `activeTime`=:activeTime,`totalTime`=:totalTime,`servings`=:servings,`activeTimeDesc`=':activeTimeDesc',`totalTimeDesc`=':totalTimeDesc',`yield`=':yield' WHERE `id`=:id 

(!) PDOException: SQLSTATE[HY093]: Invalid parameter number: number of bound variables does not match number of tokens in /sites/kaleUI/setRecipe.php on line 77 Call Stack #TimeMemoryFunctionLocation 10.0008695680{main}()../setRecipe.php:0 20.0267722104execute ()../setRecipe.php:77 

當我與cooresponding數據替代SQL佔位符我有運行在更新沒有問題mysql ...

Answer 1

您在參數佔位符周圍使用了引號，這是不正確的。不管類型如何，不應引用所有佔位符。 PDO只能看到您的7個佔位符中的4個，因爲它不能識別引號中的那些，因此會導致不匹配錯誤。改變這一行：

$recipeSet[] = "`$field`=':$field'"; 

所以就變成：

$recipeSet[] = "`$field`= :$field";