如何使用PHP在JSON数组中打印第1，第3，第5个元素

Question

I triied to get data from other web site and convert it in to json array.

following code used for it.

foreach($models1 as $mod)
{
    $result[] = array('model'=> $mod);

}

$finalResultArray = array(
        'mobiles' => $result
);

echo json_encode($finalResultArray);

then the result was

{"mobiles":[{"model":"Apple iPhone 5c 16GB"},{"model":"93,000"},{"model":"Apple iPhone 5s 16GB"},{"model":"117,312"},{"model":"Apple iPhone 5 32GB"},{"model":"94,280"},{"model":"Apple iPhone 4S 16GB"},{"model":"82,000"},{"model":"Apple iPhone 5 16GB"},{"model":"93,000"}]}

I want to print this array as like this

{"mobiles":[{"model":"Apple iPhone 5c 16GB"},{"model":"Apple iPhone 5s 16GB"},{"model":"Apple iPhone 5 32GB"},{"model":"Apple iPhone 4S 16GB"},{"model":"Apple iPhone 5 16GB"}]}

i want to remove {"model":"93,000"},{"model":"117,312"} etc... from this JSON array

Can any one help me...????

Answer 1

As it has been seen in your question , you want to remove the odd index number array values.

$i = 0;
foreach($models1 as $mod)
{
    if(($i % 2) == 0) {
        $result[] = array('model'=> $mod);
        $i++;
    }
}

Answer 2

If you can change the way you make the array, it will be simple enough to do using a modulus operator as follows:

$i=0;
foreach($models1 as $mod)
{
    if(($i+1)%2==1)
    {
        $result[] = array('model'=> $mod);
    }
    $i++;
}

This will only insert the odd numbers into the array to start off with. If you want to have all the entries in the array but only display the odd ones, you can easily modify this example to output only what you need.

Answer 3

上面提供的解决方案实际上很好，尽管它具有array_filter函数，所以您可以轻松地进行复杂的过滤，而不仅仅是“奇数模型”。

Answer 4

You can do it like this convert json to array, skip the odd values, and store in an array and again convert array to json

    foreach($models1 as $key => $value)
    {
        if($key%2 == 0)
        {
            $arr_new['mobiles'][] = $value;
        }
    }
    $json_new = json_encode($arr_new);
    echo $json_new;

The output is as below

       {"mobiles":[{"model":"Apple iPhone 5c 16GB"},{"model":"Apple iPhone 5s 16GB"},{"model":"Apple iPhone 5 32GB"},{"model":"Apple iPhone 4S 16GB"},{"model":"Apple iPhone 5 16GB"}]}

Answer 5

If the rule is just to remove elements with odd keys then try this:

// This loop keeps elements with index 0, 2, 4 ... and so on
for ($i=0;$i<count($models1);$i=$i+2){
  $finalResultArray['mobiles'][] = array('model' => $models1[$i]);
} 

echo json_encode($finalResultArray);