使用 PHP 将 _nested_ 数组插入 MySQL 数据库

Question

我有一个这样的嵌套数组：

array(3) { 
[1]=> array(5) { 
    ["firstname"]=> string(2) "john" 
    ["name"]=> string(2) "dorian" 
    ["email"]=> string(2) "john@example.something" 
    ["sex"]=> string(1) "m" 
    ["size"]=> string(1) "L" } 
[2]=> array(5) { 
    ["firstname"]=> string(2) "Sam" 
    ["name"]=> string(2) "Stuard" 
    ["email"]=> string(2) "sammy@some.thing" 
    ["sex"]=> string(1) "m" 
    ["size"]=> string(1) "S" } 
[3]=> array(5) { 
    ["firstname"]=> string(2) "vanessa" 
    ["name"]=> string(2) "sherbatzky" 
    ["email"]=> string(2) "vanessa@bla.bla" 
    ["sex"]=> string(1) "w" 
    ["size"]=> string(3) "S" } }

最外面的数组（ [1], [2], [3] ）的数量可以改变。

我尝试过类似的东西

$columns = implode(", ",array_keys($insData));
$escaped_values = array_map('mysql_real_escape_string', array_values($insData));
$values  = implode(", ", $escaped_values);
$sql = "INSERT INTO `user`($columns) VALUES ($values)";

但我没听懂。 ：/

Answer 1

$columns = array_keys($insData[0]);
$values = "";
foreach($insData as $data)
   $values.= "(".$data['firstname'].",".$data['name'].",etc ."),";

在插入值部分省略括号

Answer 2

$columns = array();
$values = array();    

foreach($insData as $row)
{
    foreach($row as $columnName => $columnValue)
    {
        $columns[] = $columnName;
        $values[] = $columnValue;
    }

    // Build query
    $query = "INSERT INTO `user` (" . implode(",", $columns) . ") VALUES (" . implode(",", $values) . ")";

    // DO INSERT HERE (PREFERABLY WITH PDO OR MYSQLI)   

    // Reset columns/values
    $columns = array();
    $values = array(); 
}

Answer 3

mysql_ functions are deprecated。请不要将它们用于任何新代码。使用mysqli 或PDO。

您需要遍历数组，并一次插入一行。您可以为多行插入构造一个（准备好的）语句，但如果您是数据库新手，最好从基础开始，然后从那里开始构建。

// Create a new connection, see the manual on the details
$conn = new PDO(/* see PHP manual for the params*/);

// Start a new transaction. All MySQL storage engines don't support transactions,
// so this step might be superfluous. Check your schema definition and the 
// MySQL manual.
$conn->beginTransaction()

// Create a prepared statement
$stmt = $conn->prepare("INSERT INTO user (firstname, name, email, sex, size) VALUES (:firstname, :name, :email, :sex, :size)");

try {
    foreach ($insData as $dataset) {
        foreach ($dataset as $colname => $value) {
            // Bind values for the placeholders in the prepared statement
            $stmt->bindValue(":" . $colname, $value);
        }

        // Run your query
        $stmt->execute();
    }

    // Commit the changes pending in the transaction
    $conn->commit();
} catch (PDOException $e) {
    // Rollback all statements in the transaction on errors
    $conn->rollback();
}

如果您需要动态创建整个语句，这也是可能的。它只需要一个额外的步骤来创建查询的列部分。