CakePHP和多选复选框

Question

对不起，我到处都是。当然，我在PHP中使用数组做了一个基本错误。仅当我使用参数'selected'=＆gt;时，FormHelper才会返回正确的HTML输入复选框。阵列（1,45,46）。当他们尝试使用从控制器发送的数组时，无法正常显示。如何将数组转换为参数“selected”。我做错了什么。

    debug($selected_dostrony);
/*
array(
    (int) 0 => '1',
    (int) 1 => '45',
    (int) 2 => '39',
    (int) 3 => '46',
    (int) 4 => '40',
    (int) 5 => '41',
    (int) 6 => '42',
    (int) 7 => '43',
    (int) 8 => '44'
)
*/



$selected_dostrony=implode(", ", $selected_dopostu);
debug($selected_dostrony);

/*
'1, 45, 39, 46, 40, 41, 42, 43, 44' 

* /

echo $this->Form->input('Product', array('multiple' => 'checkbox', 'options' => $dopostu, 'selected' => $selected_dopostu));
echo $this->Form->input('Product', array('multiple' => 'checkbox', 'options' => $dopostu, 'selected' => $selected_dostrony));

/* this works */
    echo $this->Form->input('Product', array('multiple' => 'checkbox', 'options' => $dopostu, 'selected' => array(1,45,46)));