Question

我写了一个非常简单的if语句来检查url。它工作得很好，但是有什么办法可以减少它吗？

    <?php if ($_SERVER['REQUEST_URI'] === "/jim.html") { ?>
    <a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="#">Inman jim <i class="fa fa-angle-down"></i></a>
    <?php } elseif ($_SERVER['REQUEST_URI'] === "/bob.html") { ?>
    <a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="#">bob <i class="fa fa-angle-down"></i></a>
    <?php } elseif ($_SERVER['REQUEST_URI'] === "/dereck.html") { ?>
    <a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="#">dereck <i class="fa fa-angle-down"></i></a>
    <?php } elseif ($_SERVER['REQUEST_URI'] === "/maxamilamatronicus") { ?>
    <a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="#">maxamilamatronicus <i class="fa fa-angle-down"></i></a>

只需在下拉菜单中显示正确的标题即可。

谢谢！

Answer 1

这是一个更简单的代码，它给出了相同的结果：

        JSONObject jsonObj = new JSONObject(json_response);
        String source = jsonObj.getString("source");
        String msgType = jsonObj.getString("msgType");
        JSONArray jsonArray = jsonObj.getJSONArray("properties");               
        JSONObject IMEIObject = jsonArray.getJSONObject("IMEI");
        String IMEI = IMEIObject.getJSONString("string");
        JSONObject myTimeObject = jsonArray.getJSONObject("My Time");
        String myTime = myTimeObject.getJSONString("string");
        JSONObject posObject = jsonArray.getJSONObject("Position");
        JSONObject lljsonObject = posObject.getJSONObject("geographicPosition");
        String latitude = lljsonObject.getJSONString(String.valueOf("latitude"));
        String longitude = lljsonObject.getJSONString(String.valueOf("longitude"));

请注意，如果<?php $menus = [ '/jim.html' => [ 'title' => 'Inman jim', 'href' => '#'], '/bob.html' => [ 'title' => 'bob', 'href' => '#'], '/dereck.html' => [ 'title' => 'dereck', 'href' => '#'], '/maxamilamatronicus' => [ 'title' => 'maxamilamatronicus', 'href' => '#'] ]; $menu = ['title' => 'Unknown', 'href' => '#']; if(isset($menus[$_SERVER['REQUEST_URI']])) $menu = $menus[$_SERVER['REQUEST_URI']]; ?> <a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="<?=$menu['href']?>"> <?= $menu['title'] ?> <i class="fa fa-angle-down"></i> </a>不等于"Unknown"数组中的任何键，则文字为$_SERVER['REQUEST_URI']。

Answer 2

使用Switch更易读且易于维护：

switch ($_SERVER['REQUEST_URI']) {
    case "/jim.html" : ?>
                         <a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="#">Inman jim <i class="fa fa-angle-down"></i></a><?php
                         break;
    case "/bob.html" : ?>
                         <a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="#">bob <i class="fa fa-angle-down"></i></a><?php
                         break;
    case "/dereck.html" : ?>
                         <a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="#">dereck <i class="fa fa-angle-down"></i></a><?php
                         break;
    case "/maxamilamatronicus" : ?>
                         <a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="#">maxamilamatronicus <i class="fa fa-angle-down"></i></a><?php
                         break;

}

Answer 3

您可以在PHP中使用switch case。哪个更有效率。请看这里的示例：http://www.w3schools.com/php/php_switch.asp

还尝试在PHP之外保留下面的项目。这样您就可以提高可读性和效率。

<a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown">

因此，更好的解决方案是：

<a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown"
   <?php switch ($_SERVER['REQUEST_URI']) {
        case "/jim.html" : ?>
                            href="#">Inman jim <?php
                             break;
        case "/bob.html" : ?>
                             href="#">bob <?php
                             break;
        case "/dereck.html" : ?>
                              href="#">dereck <?php
                             break;
        case "/maxamilamatronicus" : ?>
                             href="#">maxamilamatronicus <?php
                             break;

    }?>
<i class="fa fa-angle-down"></i></a>

Answer 4

<a class="btn btn-primary dropdown-toggle btn-gallery" data-toggle="dropdown" href="#">
<?php
switch ($_SERVER['REQUEST_URI']) {
       case '/jim.html': $a='Inman jim'; break;
       case '/bob.html': $a='bob'; break;
       case '/dereck.html': $a='dereck'; break;
       case '/maxamilamatronicus': $a='maxamilamatronicus'; break;
       default: $a='';
}
echo $a;
?>
<i class="fa fa-angle-down"></i></a>

减少if / else语句

4 个答案: