在foreach循环内容中显示广告

Question

我有一个这样的foreach循环

    $sn_count = 1;
    $html = '';
    foreach($points as $point){
        $html .= "<div class=\"points\">"
            . "<div class=\"serial\">".$sn_count."</div>"
            . "<div class=\"pointsdesc\">"
            . $point['points_description']
            . "</div></div>";
        $sn_count++;
    }
    echo $html;

此代码输出如下所示

1第一点描述

2第二点描述

等等。

现在我想在每隔2,4,6，...点数。我是说在2-3,4-5,6-7之间...有人能帮我写代码吗？谢谢

Answer 1

您将希望使用modulus

$sn_count = 1;
$html = '';
$display_ad_every = 3;
foreach($points as $point){
    $html .= "<div class=\"points\">"
        . "<div class=\"serial\">".$sn_count."</div>"
        . "<div class=\"pointsdesc\">"
        . $point['points_description']
        . "</div></div>";
    if($sn_count++ % $display_ad_every == 0)
    {
        // append ad code here
    }
}
echo $html;

Answer 2

这应该就行了

$sn_count = 1;
$html = '';
foreach($points as $point){
    $html .= "<div class=\"points\">"
        . "<div class=\"serial\">".$sn_count."</div>"
        . "<div class=\"pointsdesc\">"
        . $point['points_description']
        . "</div></div>";
    if($sn_count % 2 === 0){
        $html .= get_ad_code()
    }

    $sn_count++;
}
echo $html;