html - php级联菜单不用ajax如何实现-PHP Tutorial-php.cn

html - php级联菜单不用ajax如何实现

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Release： 2016-06-06 20:45:59

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网站导航要实现的效果类似于下图：
html - php级联菜单不用ajax如何实现
我搜索了，发现都是ajax发送请求实现联动。我的要求是不发送请求，直接在php文件或html文件里写，再通过jquery实现下拉效果。
目录导航的数组如下：level=0表示第1层，紧跟的level=1/2……表示是第1层的子菜单。

Array
(
    [0] => Array
        (
            [cat_id] => 3
            [cat_name] => JavaScript
            [parent_id] => 0
            [level] => 0
        )

    [1] => Array
        (
            [cat_id] => 5
            [cat_name] => Jquery
            [parent_id] => 3
            [level] => 1
        )

    [2] => Array
        (
            [cat_id] => 6
            [cat_name] => JS高级
            [parent_id] => 3
            [level] => 1
        )

    [3] => Array
        (
            [cat_id] => 4
            [cat_name] => PHP
            [parent_id] => 0
            [level] => 0
        )

)

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html代码如下：

<ul id="nav">
  <li><a href="./">首页</a></li>
<?php foreach ($treelist as $v) { ?>
  <li><a href="category.php?cid=<?php echo $v['cat_id']; ?>"><?php echo $v['cat_name']; ?></a></li>
<?php } ?>
</ul>

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回复内容：

Array
(
    [0] => Array
        (
            [cat_id] => 3
            [cat_name] => JavaScript
            [parent_id] => 0
            [level] => 0
        )

    [1] => Array
        (
            [cat_id] => 5
            [cat_name] => Jquery
            [parent_id] => 3
            [level] => 1
        )

    [2] => Array
        (
            [cat_id] => 6
            [cat_name] => JS高级
            [parent_id] => 3
            [level] => 1
        )

    [3] => Array
        (
            [cat_id] => 4
            [cat_name] => PHP
            [parent_id] => 0
            [level] => 0
        )

)

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html代码如下：

<ul id="nav">
  <li><a href="./">首页</a></li>
<?php foreach ($treelist as $v) { ?>
  <li><a href="category.php?cid=<?php echo $v['cat_id']; ?>"><?php echo $v['cat_name']; ?></a></li>
<?php } ?>
</ul>

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不用ajax，一次把所有数据都读出来，但是hide show 的效果必须要js了，有几种方法，可以php里把数据做成json，在js里调用show hide，也可以直接把全部array先在页面上显示成link默认hide，然后根据点哪个show哪个。

---下面是把array先在页面上生成html，但是根据不同class值来判断show/hide
把每层都查出来，把原来用0、1、2的array key 改成用每组数据的属性当做可以，如下：

<code>array(
    'l1' => array(
        key1 => value1,
        key2 => value2,
        key3 => value3
    ),
    'l2' => array(
        key1 => value1,
        key2 => value2,
        key3 => value3
    )
    .......
);
</code>

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给每层array key都附上值，全部生成出来，根据key value 不同在link上生成不同的class，默认全部hide，然后click哪个按钮就显示哪个吧，几个if elseif else搞定，因为每组数据都有key了，可以简单地判断哪个按钮对应那组数据。

在显示之前把它们都查出来，只是用js默认不显示它们,等点击再显示它们

不是很明确你的意思,是要实现这样无限级树形菜单么?

<html>
    <head>
    </head>
    <style>
        /*li {list-style-type:none;}*/
        span{cursor: pointer;background-color: yellowgreen;font-size: 20px}
        .hidden{display: none}
    </style>
    <script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
    <body>
        <?php
        $arr = Array(
            Array("cat_id" => 3, "cat_name" => "JavaScript", "parent_id" => 0, "level" => 0),
            Array("cat_id" => 5, "cat_name" => "Jquery", "parent_id" => 3, "level" => 1),
            Array("cat_id" => 6, "cat_name" => "JS高级", "parent_id" => 3, "level" => 1),
            Array("cat_id" => 7, "cat_name" => "JS高级更高级1", "parent_id" => 6, "level" => 3),
            Array("cat_id" => 8, "cat_name" => "JS高级更高级2", "parent_id" => 6, "level" => 3),
            Array("cat_id" => 9, "cat_name" => "JS高级更高级3", "parent_id" => 6, "level" => 3),
            Array("cat_id" => 4, "cat_name" => "PHP", "parent_id" => 0, "level" => 0),
            Array("cat_id" => 10, "cat_name" => "PHP高级1", "parent_id" => 4, "level" => 0),
            Array("cat_id" => 12, "cat_name" => "PHP高级2", "parent_id" => 4, "level" => 0),
            Array("cat_id" => 13, "cat_name" => "PHP高级3", "parent_id" => 4, "level" => 0)
        );

//创建树形菜单
        function createTree(&$arr, $parent_id) {
            $hide = "";
            if ($parent_id != 0) {
                $hide = "hidden";
            }
            $funcName = __FUNCTION__;
            $ul = "";
            $li = "";
            for ($i = 0; $i < count($arr); $i++) {
                if ($arr[$i]["parent_id"] == $parent_id) {
                    $child = $funcName($arr, $arr[$i]['cat_id']);
                    $li .= "\r\n<li id=\"{$arr[$i]['cat_id']}\" class=\"cate\"><span>{$arr[$i]["cat_name"]}</span>{$child}</li>\r\n";
                }
            }
            if ($li != "") {
                $ul = "

<ul class=\"cate {$hide}\">{$li}</ul>

";
            }
            return $ul;
        }

        echo createTree($arr, 0);
        ?>
    </body>
    <script>
        (function() {
            $(".cate").hover(function() {
                $(this).children("ul").show()
            }, function() {
                $(this).children("ul").hide()
            })
        })()
    </script>
</html>

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