How to write a prompt box similar to alert() in js in PHP

This article mainly introduces PHP to implement a prompt box function similar to the alert() in js. It is very practical. I recommend it to everyone. Friends who need it can refer to it. I hope you will like it.

Mainly used for adding judgment prompts, jumps, returns, and refreshes.

The code is as follows:

/**
 * JS提示跳转
 * @param  $tip  弹窗口提示信息(为空没有提示)
 * @param  $type 设置类型 close = 关闭 ，back=返回 ，refresh=提示重载，jump提示并跳转url
 * @param  $url  跳转url
 */
function alert($tip = "", $type = "", $url = "") {
    $js = "<script>";
    if ($tip)
        $js .= "alert(&#39;" . $tip . "&#39;);";
    switch ($type) {
        case "close" : //关闭页面
            $js .= "window.close();";
            break;
        case "back" : //返回
            $js .= "history.back(-1);";
            break;
        case "refresh" : //刷新
            $js .= "parent.location.reload();";
            break;
        case "top" : //框架退出
            if ($url)
                $js .= "top.location.href=&#39;" . $url . "&#39;;";
            break;
        case "jump" : //跳转
            if ($url)
                $js .= "window.location.href=&#39;" . $url . "&#39;;";
            break;
        default :
            break;
    }
    $js .= "</script>";
    echo $js;
    if ($type) {
        exit();
    }
}

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