多次插入後更新特定記錄 - 可能使用last_insert_id（）

Question

我有一個使用for循環的多次插入（4條記錄）。然後，我想在插入path_allowed ='y'的記錄上運行更新查詢（只有四個中的一個具有此值）。我猜LAST_INSERT_ID（）在這裏很有用，但不知道如何使用它來更新插入該記錄如下：

$pathway_allowed = intval($_POST['allowed']); 
$action = mysql_real_escape_string($_POST['actions']); 

if(isset($_POST['submit'])){ 

$pathway_comment = array(); 
foreach($_POST['comment'] as $comment) { 
    $pathway_comment[]= mysql_real_escape_string($comment); 
} 
for($i=0, $count = count($pathway_comment);$i<$count;$i++) { 
    $comment = $pathway_comment[$i]; 
    $query = sprintf(
     "INSERT INTO pathway (    
      pathway_pk, 
      case_fk, 
      level, 
      pathway_action_fk, 
      pathway_allowed, 
      comment 
     ) VALUES (
      '', 
      '$case_pk', 
      '1', 
      '$action', 
      '%s', 
      '$comment')", $pathway_allowed === $i ? 'y' : 'n'); 

     $result = mysql_query($query, $connection) or die(mysql_error()); 
} 
if($result){ 
- SELECT the 4 records here... 
} 
} 

Answer 1

在每次循環迭代中，mysql_insert_id()存儲到一個數組，你可以在以後使用選擇新的記錄。請注意，我用一個整潔foreach這裏免去您的增量for循環：

// Initialize arrays for later 
// one for the new ids 
$inserted_ids = array(); 
// one to keep comments from failed queries 
$failed_comments = array(); 
// and one for the MySQL errors of failed queries 
$errors = array(); 

foreach ($pathway_comment as $comment) { 
    $query = sprintf(
     "INSERT INTO pathway (    
      pathway_pk, 
      case_fk, 
      level, 
      pathway_action_fk, 
      pathway_allowed, 
      comment 
     ) VALUES (
      '', 
      '$case_pk', 
      '1', 
      '$action', 
      '%s', 
      '$comment')", $pathway_allowed === $i ? 'y' : 'n'); 

     $result = mysql_query($query, $connection); 

     // If the iteration was successful, save the insert id onto an array 
     // but only if $pathway_allowed == 'y' 
     if ($result) { 
      if ($pathway_allowed == 'y') { 
       $inserted_ids[] = mysql_insert_id();   
      } 
     } 
     // Otherwise, keep an array of comments that failed 
     // Maybe useful later if you want to print those that failed 
     else { 
      $failed_comments[] = $comment; 
      // And keep the mysql_error() as well. 
      $errors[] = mysql_error(); 
     } 
} 
// Loop is done, now you can implode() the inserted ids array: 
// These are all ints from an auto_increment PK, so no additional escaping needed 
// Execute the query than do whatever you need with the newly inserted rows. 
$query = "SELECT * FROM pathway WHERE pathway_pk IN (" . implode(",", $inserted_ids) . ")"; 

你可能已經聽說過這一點，但從長遠看，考慮切換到支持預處理語句，像庫MySQLi或API PDO。你已經完成了所有必要的轉義和整型轉換，但是如果在循環中編譯並執行預處理語句，除了不需要轉義之外，它可以更快。

Answer 2

mysql_connect擴展從PHP 5.5.0開始已棄用，未來將在 中刪除。相反，應該使用MySQLi或PDO_MySQL擴展。 另請參見MySQL：爲更多 信息選擇API指南和相關FAQ。此功能的替代方案包括：PDO和mysqli_connect（）

如果您使用的是PDO，則可以使用此功能。

$dbh = new PDO('mysql:host=localhost;dbname=test', 'username', 'password'); 

，並在for循環，你做這樣的事情：

$stmt = $dbh->prepare("INSERT INTO test (name, email) VALUES(?,?)"); 
$tmt->execute(array('user', 'user@example.com')); 
$inserted_ids[] = $dbh->lastInsertId(); 

循環後，你將有4個插入ID的數組

編輯：您不需要重新選擇您輸入您可以使用此

IN FOR LOOP 
{ 
    $stmt = $dbh->prepare($query = sprintf("INSERT INTO pathway (pathway_pk,case_fk,level,pathway_action_fk,pathway_allowed, comment) 
    VALUES (
     '', 
     '$case_pk', 
     '1', 
     '$action', 
     '%s', 
     '$comment')", $pathway_allowed === $i ? 'y' : 'n');); 

     // change the values to bindParam 

    $stmt->execute(array('user', 'user@example.com')); 
    $data[$i]['pathway_pk'] = $dbh->lastInsertId(); 
    $data[$i]['case_fk'] = $case_pk; 
    $data[$i]['level'] = 1; 
    $data[$i]['pathway_action_fk'] = $action; 
    $data[$i]['pathway_allowed'] = %s; 
    $data[$i]['comment'] = $comment; 

} 

然後

值

foreach($data as $d){ 

    echo $d['pathway_pk']; 
    echo $d['case_fk']; 


}