php输出构造函数数组

Question

I tried executing the code below to output each value from an array, end up result show:

Notice: Array to string conversion in C:\xampp\htdocs\test\tutor.php on line 22
_data : Array

PHP

<?php
class CateData 
{
    private $_data = array();

    public function __construct($data){

        $this->_data = $data;
    }
}

$data = array(
            'a'=>'Cate1',
            'b'=>'Cate2',
            'c'=>'Cate3',
            'd'=>'Cate4'
        );

$cate = new CateData($data);

foreach($cate as $key => $val){
    echo $key." : ". $val;
}
?>

How can I solve this?

Answer 1

You're looping on the class object and not on the actual data.

In your class add:

public function getData(){
   return $this->_data;
}

Then change:

foreach($cate as $key => $val){
    echo $key." : ". $val;
}

To:

foreach($cate->getData() as $key => $val){
    echo $key." : ". $val;
}