从2d会话数组的php unset数组

Question

我正在向这样的二维数组添加内容:

 $_SESSION['vehicles'][] = array ('model' => $_REQUEST['blah1'], 'price' => $_REQUEST['blah2'], 'year' => $_REQUEST['blah3']);  

我如何从会话中删除所有具有'model'=到我选择的变量的数组？(注意:会话中总会有许多具有相同模型的数组.)

我已经尝试过以下但它似乎没有从我的会话数组中删除任何东西:

$model = "toyota";
foreach ($_SESSION['vehicles'] as $vehicle) 
{
    unset($vehicle[$model]);
}

谢谢!

Answer 1

$ vehicle通过副本传递,因此,unset $ vehicle什么都不做

$model = "toyota";
foreach ($_SESSION['vehicles'] as $idx => $vehicle){
    if($vehicle['model'] == $model){
        unset($_SESSION['vehicles'][$idx]);
    }
}

Answer 2

$model = 'toyota';

// PHP <= 5.2
$_SESSION['vehicles'] = array_filter($_SESSION['vehicles'],
              create_function('$v', "return \$v['model'] != '$model';"));

// PHP 5.3+
$_SESSION['vehicles'] = array_filter($_SESSION['vehicles'],
              function ($v) use ($model) { return $v['model'] != $model; });

或者,你的方法:

foreach ($_SESSION['vehicles'] as $key => $vehicle) {
    if ($vehicle['model'] == $model) {
        unset($_SESSION['vehicles'][$key]);
    }
}