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Yii框架官方指南系列43——专题:URL(创建、路由、美化及自定义)

黄舟

黄舟

发布时间:2017-02-16 09:29:10

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1651人浏览过

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来源于php中文网

原创


web应用程序完整的url管理包括两个方面。首先, 当用户请求约定的url,应用程序需要解析 它变成可以理解的参数。第二,应用程序需求提供一种创造url的方法,以便创建的url应用程序可以理解的。对于yii应用程序,这些通过curlmanager辅助完成。

1. Creating URLs(创建网址)

虽然URL可被硬编码在控制器的视图(view)文件,但往往可以很灵活地动态创建它们:

$url=$this->createUrl($route,$params);

$this指的是控制器实例; $route指定请求的route 的要求;$params列出了附加在网址中的GET参数。

默认情况下,URL以get格式使用createUrl创建。例如,提供$route='post/read'和$params=array('id'=>100) ,我们将获得以下网址:

/index.php?r=post/read&id=100

参数以一系列Name=Value通过符号串联起来出现在请求字符串,r参数指的是请求的route 。这种URL格式用户友好性不是很好,因为它需要一些非字字符。

我们可以使上述网址看起来更简洁,更不言自明,通过采用所谓的'path格式,省去查询字符串和把GET参数加到路径信息,作为网址的一部分:

/index.php/post/read/id/100

要更改URL格式,我们应该配置urlManager应用元件,以便createUrl可以自动切换到新格式和应用程序可以正确理解新的网址:

array(
    ......
    'components'=>array(
        ......
        'urlManager'=>array(
            'urlFormat'=>'path',
        ),
    ),
);

请注意,我们不需要指定的urlManager元件的类,因为它在CWebApplication预声明为CUrlManager。

createurl方法所产生的是一个相对地址。为了得到一个绝对的url ,我们可以用前缀yii">提示:此网址通过createurl方法所产生的是一个相对地址。为了得到一个绝对的url ,我们可以用前缀yii::app()->hostInfo ,或调用createAbsoluteUrl 。

2. User-friendly URLs(用户友好的URL)

当用path格式URL,我们可以指定某些URL规则使我们的网址更用户友好性。例如,我们可以产生一个短短的URL/post/100 ,而不是冗长/index.php/post/read/id/100。网址创建和解析都是通过CUrlManager指定网址规则。

要指定的URL规则,我们必须设定urlManager 应用元件的属性rules:

array(
    ......
    'components'=>array(
        ......
        'urlManager'=>array(
            'urlFormat'=>'path',
            'rules'=>array(
                'pattern1'=>'route1',
                'pattern2'=>'route2',
                'pattern3'=>'route3',
            ),
        ),
    ),
);

这些规则以一系列的路线格式对数组指定,每对对应于一个单一的规则。路线(route)的格式必须是有效的正则表达式,没有分隔符和修饰语。它是用于匹配网址的路径信息部分。还有route应指向一个有效的路线控制器。

规则可以绑定少量的GET参数。这些出现在规则格式的GET参数,以一种特殊令牌格式表现如下:

'pattern1'=>array('route1', 'urlSuffix'=>'.xml', 'caseSensitive'=>false)

上面的数组包含了一系列自定义的选项设置,在版本1.1.0中,下面的选项是有效的:

  • urlSuffix: URL所使用的后缀设置规则,默认是null,使用的是CUrlManager::urlSuffix的设置.

  • caseSensitive: 规则是否是大小学敏感的,默认是null,使用的是CUrlManager::caseSensitive的默认值.

  • defaultParams: 规则提供的GET参数的默认值 (name=>value). 当规则用来解析输入请求的时候,该属性中声明的值将会注入$_GET.

  • matchValue: 当创建一个URL的时候GET参数的值是否和规则中相应的子模式相匹配. 默认是null, 意味着使用的是CUrlManager::matchValue中的值. 如果属性值是false, 意味着如果路由和参数名与给定的匹配那么该规则被用来创建一个URL. 如果该属性被设置为true,那么给定的参数值一定也要和相应的子模式参数值相匹配. 注意如果设置该属性的值为true将会降低性能

使用命名参数

一个规则可以关联一些GET参数。这些GET参数作为特殊令牌出现在规则的模式中,如下所示:

;

ParamName表示GET参数名字,可选项ParamPattern表示将用于匹配GET参数值的正则表达式。当生成一个网址(URL)时,这些参数令牌将被相应的参数值替换;当解析一个网址时,相应的GET参数将通过解析结果来生成。

我们使用一些例子来解释网址工作规则。我们假设我们的规则包括如下三个:

array(
    'posts'=>'post/list',
    'post/'=>'post/read',
    'post//'=>'post/read',
)</pre><p></p>
<ul class=" list-paddingleft-2">
<li><p>调用<code>$this->createUrl('post/list')</code>生成<code>/index.php/posts</code>。第一个规则适用。</p></li>
<li><p>调用<code>$this->createUrl('post/read',array('id'=>100))</code>生成<code>/index.php/post/100</code>。第二个规则适用。</p></li>
<li><p>调用<code>$this->createUrl('post/read',array('year'=>2008,'title'=>'a sample post'))</code>生成<code>/index.php/post/2008/a%20sample%20post</code>。第三个规则适用。</p></li>
<li><p>调用<code>$this->createUrl('post/read')</code>产生<code>/index.php/post/read</code>。请注意,没有规则适用。</p></li>
</ul>
<p>总之,当使用createUrl生成网址,路线和传递给该方法的GET参数被用来决定哪些网址规则适用。如果关联规则中的每个参数可以在GET参数找到的,将被传递给createUrl ,如果路线的规则也匹配路线参数,规则将用来生成网址。</p>
<p>如果GET参数传递到createUrl是以上所要求的一项规则,其他参数将出现在查询字符串。例如,如果我们调用<code>$this->createUrl('post/read',array('id'=>100,'year'=>2008))</code> ,我们将获得<code>/index.php/post/100?year=2008</code>。为了使这些额外参数出现在路径信息的一部分,我们应该给规则附加<code>/*</code>。 因此,该规则<code>post/<id:>/*</id:></code> ,我们可以获取网址<code>/index.php/post/100/year/2008</code> 。</p>
<p>正如我们提到的,URL规则的其他用途是解析请求网址。当然,这是URL生成的一个逆过程。例如, 当用户请求<code>/index.php/post/100</code> ,上面例子的第二个规则将适用来解析路线<code>post/read</code>和GET参数<code>array('id'=>100)</code> (可通过<code>$_GET</code>获得) 。</p>
<blockquote><p>createurl方法所产生的是一个相对地址。为了得到一个绝对的url ,我们可以用前缀<code><code>yii"></code></code>注:使用的URL规则将降低应用的性能。这是因为当解析请求的URL ,[ CUrlManager ]尝试使用每个规则来匹配它,直到某个规则可以适用。因此,高流量网站应用应尽量减少其使用的URL规则。</p></blockquote>
<h4>参数化路由</h4>
<p>从版本1.0.5开始, 我们可能会用到命名参数作为路由规则的一部分. 这就允许一个规则可以基于匹配规范被用来匹配多个路由,这也许还会帮助减少应用所需的规则的数目,从而提高整体的性能.</p>
<p>我们使用如下示例规则来说明如何通过命名参数来参数化路由:</p>
<p></p><pre class="brush:php;toolbar:false;">array(
    '<_c:(post|comment)>/<id:\d+>/<_a:(create|update|delete)>' => '<_c>/<_a>',
    '<_c:(post|comment)>/<id:\d+>' => '<_c>/read',
    '<_c:(post|comment)>s' => '<_c>/list',
)</pre><p></p>
<p>在上面的示例中, 我们在路由规则中使用了两个命名参数: <code>_c</code>和<code>_a</code>. The former matches a controller ID to be either <code>post</code> or <code>comment</code>, while the latter matches an action ID to be <code>create</code>, <code>update</code> or <code>delete</code>. You may name the parameters differently as long as they do not conflict with GET parameters that may appear in URLs.</p>
<p>使用上面的规则, URL <code>/index.php/post/123/create</code> 将会被解析为 <code>post/create</code> 使用GET参数 <code>id=123</code>. And given the route <code>comment/list</code> and GET parameter <code>page=2</code>, we can create a URL <code>/index.php/comments?page=2</code>.</p>
<h4>参数化主机名</h4>
<p>从版本1.0.11开始, it is also possible to include hostname into the rules for parsing and creating URLs. One may extract part of the hostname to be a GET parameter. For example, the URL <code>http://www.php.cn/</code> may be parsed into GET parameters <code>user=admin</code> and <code>lang=en</code>. On the other hand, rules with hostname may also be used to create URLs with paratermized hostnames.</p>
<p>In order to use parameterized hostnames, simply declare URL rules with host info, e.g.:</p>
<p></p><pre class="brush:php;toolbar:false;">array(
    'http://<user:\w+>.example.com/<lang:\w+>/profile' => 'user/profile',
)</pre><p></p>
<p>The above example says that the first segment in the hostname should be treated as <code>user</code>parameter while the first segment in the path info should be <code>lang</code> parameter. The rule corresponds to the <code>user/profile</code> route.</p>
<p>Note that CUrlManager::showScriptName will not take effect when a URL is being created using a rule with parameterized hostname.</p>
<p>Also note that the rule with parameterized hostname should NOT contain the sub-folder if the application is under a sub-folder of the Web root. For example, if the application is under <code>http://www.php.cn/</code>, then we should still use the same URL rule as described above without the sub-folder <code>sandbox/blog</code>.</p>
<h4>隐藏 <code>index.php</code>
</h4>
<p>还有一点,我们可以做进一步清理我们的网址,即在URL中藏匿<code>index.php</code>入口脚本。这就要求我们配置Web服务器,以及urlManager应用程序元件。</p>
<p>我们首先需要配置Web服务器,这样一个URL没有入口脚本仍然可以处理入口脚本。如果是Apache HTTP server,可以通过打开网址重写引擎和指定一些重写规则。这两个操作可以在包含入口脚本的目录下的<code>.htaccess</code>文件里实现。下面是一个示例:</p><pre class="brush:php;toolbar:false;">Options +FollowSymLinks
IndexIgnore */*
RewriteEngine on

# if a directory or a file exists, use it directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

# otherwise forward it to index.php
RewriteRule . index.php</pre><p>然后,我们设定urlManager元件的showScriptName属性为 <code>false</code>。</p>
<p>注意在正式测试之前确保apache开启了rewrite模块,在ubuntu中开启的方式如下:</p>
<p>cd /etc/apache2/mods-enabled</p>
<p>sudo ln -s ../mods-available/rewrite.load rewrite.load</p>
<p>sudo service apache2 restart</p>
<p>现在,如果我们调用<code>$this->createUrl('post/read',array('id'=>100))</code> ,我们将获取网址<code>/post/100</code>。更重要的是,这个URL可以被我们的Web应用程序正确解析。</p>
<h4>Faking URL Suffix(伪造URL后缀)</h4>
<p>我们还可以添加一些网址的后缀。例如,我们可以用<code>/post/100.html</code>来替代<code>/post/100</code> 。这使得它看起来更像一个静态网页URL。为了做到这一点,只需配置urlManager元件的urlSuffix属性为你所喜欢的后缀。</p>
<h3>3. 使用自定义URL规则设置类</h3>
<blockquote><p><strong>注意:</strong> Yii从1.1.8版本起支持自定义URL规则类</p></blockquote>
<p>默认情况下,每个URL规则都通过CUrlManager来声明为一个CUrlRule对象,这个对象会解析当前请求并根据具体的规则来生成URL。 虽然CUrlRule可以处理大部分URL格式,但在某些特殊情况下仍旧有改进余地。</p>
<p>比如,在一个汽车销售网站上,可能会需要支持类似<code>/Manufacturer/Model</code>这样的URL格式, 其中<code>Manufacturer</code> 和 <code>Model</code> 都各自对应数据库中的一个表。此时CUrlRule就无能为力了。</p>
<p>我们可以通过继承CUrlRule的方式来创造一个新的URL规则类。并且使用这个类解析一个或者多个规则。 以上面提到的汽车销售网站为例,我们可以声明下面的URL规则。</p>
<p></p><pre class="brush:php;toolbar:false;">array(
    // 一个标准的URL规则,将 '/' 对应到 'site/index'
    '' => 'site/index',

    // 一个标准的URL规则,将 '/login' 对应到 'site/login', 等等
    '<action:(login|logout|about)>' => 'site/<action>',

    // 一个自定义URL规则,用来处理 '/Manufacturer/Model'
    array(
        'class' => 'application.components.CarUrlRule',
        'connectionID' => 'db',
    ),

    // 一个标准的URL规则,用来处理 'post/update' 等
    '<controller:\w+>/<action:\w+>' => '<controller>/<action>',
),</pre><p></p>
<p>从以上可以看到,我们自定义了一个URL规则类<code>CarUrlRule</code>来处理类似<code>/Manufacturer/Model</code>这样的URL规则。 这个类可以这么写:</p>
<p></p><pre class="brush:php;toolbar:false;">class CarUrlRule extends CBaseUrlRule
{
    public $connectionID = 'db';

    public function createUrl($manager,$route,$params,$ampersand)
    {
        if ($route==='car/index')
        {
            if (isset($params['manufacturer'], $params['model']))
                return $params['manufacturer'] . '/' . $params['model'];
            else if (isset($params['manufacturer']))
                return $params['manufacturer'];
        }
        return false;  // this rule does not apply
    }

    public function parseUrl($manager,$request,$pathInfo,$rawPathInfo)
    {
        if (preg_match('%^(\w+)(/(\w+))?$%', $pathInfo, $matches))
        {
            // check $matches[1] and $matches[3] to see
            // if they match a manufacturer and a model in the database
            // If so, set $_GET['manufacturer'] and/or $_GET['model']
            // and return 'car/index'
        }
        return false;  // this rule does not apply
    }
}</pre><p></p>
<p>自定义URL规则类必须实现在CBaseUrlRule中定义的两个接口。</p>
<ul class=" list-paddingleft-2">
<li><p>[CBaseUrlRule::createUrl()|createUrl()]</p></li>
<li><p>[CBaseUrlRule::parseUrl()|parseUrl()]</p></li>
</ul>
<p>除了这种典型用法,自定义URL规则类还可以有其他的用途。比如,我们可以写一个规则类来记录有关URL解析和UEL创建的请求。 这对于正在开发中的网站来说很有用。我们还可以写一个规则类来在其他URL规则都匹配失败的时候显示一个自定义404页面。 注意,这种用法要求规则类在所有其他规则的最后声明。</p>
<p> 以上就是Yii框架官方指南系列43——专题:URL(创建、路由、美化及自定义)的内容,更多相关内容请关注PHP中文网(www.php.cn)!<br></p>					</div>
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<script>
	setCookie('is_article', 1, 1);
</script>

<script>
	var is_login = "0";
        var show = 0;
        var ceng = getCookie('ceng');
        //未登录复制显示登录按钮
        if(is_login == 0 && false){
            $(".code").hover(function(){
                $(this).find('.contentsignin').show();
            },function(){
                $(this).find('.contentsignin').hide();
            });
            //不给复制
            $('.code').bind("cut copy paste",function(e) {
                e.preventDefault();
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            $('.code .contentsignin').click(function(){
                $(document).trigger("api.loginpopbox");
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            // 获取所有的 <pre> 元素
            var preElements = document.querySelectorAll('pre');
            preElements.forEach(function(preElement) {
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                copyButton.className = 'copy-button';
                copyButton.textContent = '复制';
                // 添加点击事件处理程序
                copyButton.addEventListener('click', function() {
                    // 获取当前按钮所属的 <pre> 元素中的文本内容
                    var textContent = preElement.textContent.trim();
                    // 创建一个临时 textarea 元素并设置其值为 <pre> 中的文本内容
                    var tempTextarea = document.createElement('textarea');
                    tempTextarea.value = textContent;
                    // 将临时 textarea 添加到文档中
                    document.body.appendChild(tempTextarea);
                    // 选中临时 textarea 中的文本内容并执行复制操作
                    tempTextarea.select();
                    document.execCommand('copy');
                    // 移除临时 textarea 元素
                    document.body.removeChild(tempTextarea);
                    // 更新按钮文本为 "已复制"
                    this.textContent = '已复制';
                });

                // 创建AI写代码按钮
                var aiButton = document.createElement('button');
                aiButton.className = 'copy-button';
                aiButton.textContent = 'AI写代码';
                aiButton.style.marginLeft = '5px';
                aiButton.style.marginRight = '5px';
                // 添加点击事件处理程序
                aiButton.addEventListener('click', function() {
                // Generate a random number between 0 and 1
                        var randomChance = Math.random();

                    // If the random number is less than 0.5, open the first URL, else open the second
                    if (randomChance < 0.5) {
                        window.open('https://www.doubao.com/chat/coding?channel=php&source=hw_db_php', '_blank');
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                        window.open('https://click.aliyun.com/m/1000402709/', '_blank');
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                // 将按钮添加到 <pre> 元素前面
                preElement.parentNode.insertBefore(copyButton, preElement);
                preElement.parentNode.insertBefore(aiButton, preElement);
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        }
</script>