CodeIgniter4 HTML 辅助函数

HTML 辅助函数包含的函数辅助 HTML 运行。

加载 HTML 辅助函数

HTML 辅助函数使用下面的代码加载:

helper('html');

通用函数

下面的函数是通用的:

img([$src = ''[, $indexPage = false[, $attributes = '']]])

让你创建 HTML <img /> tags. 第一个参数包含 image 原始码。事例:

echo img('images/picture.jpg');
// <img src="http://site.com/images/picture.jpg" rel="external nofollow"  />

有一个可选择的第二参数是特定的 true/false 值并规定如果 src 将经由 $config['indexPage'] 被添加到地址并创建有明确说明的页面。推测起来，假如你正在使用一个 media 控制器那将是自以为是的:

echo img('images/picture.jpg', true);
// <img src="http://site.com/index.php/images/picture.jpg" rel="external nofollow"  rel="external nofollow"  alt="" />

此外，组合数组能被作为第一参数传达，为了完成控制额外的所有属性和值。 如果不提供 alt 属性，CodeIgniter 将产生空字符串。

事例:

$imageProperties = array(
    'src'    => 'images/picture.jpg',
    'alt'    => 'Me, demonstrating how to eat 4 slices of pizza at one time',
    'class'  => 'post_images',
    'width'  => '200',
    'height' => '200',
    'title'  => 'That was quite a night',
    'rel'    => 'lightbox'
);


img($imageProperties);
// <img src="http://site.com/index.php/images/picture.jpg" rel="external nofollow"  rel="external nofollow"  alt="Me, demonstrating how to eat 4 slices of pizza at one time" class="post_images" width="200" height="200" title="That was quite a night" rel="lightbox" />

link_tag([$href = ''[, $rel = 'stylesheet'[, $type = 'text/css'[, $title = ''[, $media = ''[, $indexPage = false]]]]]])

type, title, media 和 indexPage.

indexPage 是 boolean 值并规定如果 href 将经由 $config['indexPage'] 被添加到地址并创建有明确说明的页面。

事例:

echo link_tag('css/mystyles.css');
// <link href="http://site.com/css/mystyles.css" rel="external nofollow" target="_blank"  rel="stylesheet" type="text/css" />

更多事例:

echo link_tag('favicon.ico', 'shortcut icon', 'image/ico');
// <link href="http://site.com/favicon.ico" rel="external nofollow" target="_blank"  rel="shortcut icon" type="image/ico" />


echo link_tag('feed', 'alternate', 'application/rss+xml', 'My RSS Feed');
// <link href="http://site.com/feed" rel="external nofollow" target="_blank"  rel="alternate" type="application/rss+xml" title="My RSS Feed" />

间隔地，为了完全控制额外的所有属性和值组合数组能被传达到 link_tag() 函数:

$link = array(
    'href'  => 'css/printer.css',
    'rel'   => 'stylesheet',
    'type'  => 'text/css',
    'media' => 'print'
);


echo link_tag($link);
// <link href="http://site.com/css/printer.css" rel="external nofollow" target="_blank"  rel="stylesheet" type="text/css" media="print" />

script_tag([$src = ''[, $indexPage = false]])

让你创建 HTML <script></script> tags. 参数是 src, 与可选的 indexPage 一起.

indexPage 是 boolean 值并规定如果 src 将经由 $config['indexPage'] 被添加到地址并创建有明确说明的页面。

事例:

echo script_tag('js/mystyles.js');
// <script src="http://site.com/js/mystyles.js" rel="external nofollow"  type="text/javascript"></script>

间隔地，为了完全控制额外的所有属性和值组合数组能被通过 script_tag() 函数:

$script = array('src'  => 'js/printer.js');


echo script_tag($script);
// <script src="http://site.com/js/printer.js" rel="external nofollow"  type="text/javascript"></script>

ul($list[, $attributes = ''])

容许你从简单或者多倍空间的数组产生无序 HTML 目录。事例::

    $list = array(
        'red',
        'blue',
        'green',
        'yellow'
    );


    $attributes = array(
        'class' => 'boldlist',
        'id'    => 'mylist'
    );


    echo ul($list, $attributes);


上文的代码将产生下文这样地 HTML 代码:


.. code-block:: html


    <ul class="boldlist" id="mylist">
        <li>red</li>
        <li>blue</li>
        <li>green</li>
        <li>yellow</li>
    </ul>


下面是更复杂的事例，使用多维空间的数组::


    $attributes = array(
        'class' => 'boldlist',
        'id'    => 'mylist'
    );


    $list = array(
        'colors' => array(
            'red',
            'blue',
            'green'
        ),
        'shapes' => array(
            'round',
            'square',
            'circles' => array(
                'ellipse',
                'oval',
                'sphere'
            )
        ),
        'moods'  => array(
            'happy',
            'upset'   => array(
                'defeated' => array(
                    'dejected',
                    'disheartened',
                    'depressed'
                ),
                'annoyed',
                'cross',
                'angry'
            )
        )
    );


    echo ul($list, $attributes);


上文的代码将产生这样的 HTML 前端代码:


.. code-block:: html


    <ul class="boldlist" id="mylist">
        <li>colors
            <ul>
                <li>red</li>
                <li>blue</li>
                <li>green</li>
            </ul>
        </li>
        <li>shapes
            <ul>
                <li>round</li>
                <li>suare</li>
                <li>circles
                    <ul>
                        <li>elipse</li>
                        <li>oval</li>
                        <li>sphere</li>
                    </ul>
                </li>
            </ul>
        </li>
        <li>moods
            <ul>
                <li>happy</li>
                <li>upset
                    <ul>
                        <li>defeated
                            <ul>
                                <li>dejected</li>
                                <li>disheartened</li>
                                <li>depressed</li>
                            </ul>
                        </li>
                        <li>annoyed</li>
                        <li>cross</li>
                        <li>angry</li>
                    </ul>
                </li>
            </ul>
        </li>
    </ul>

ol($list, $attributes = '')

完全相似于 ul() ,为了代替有序目录 <ul> 它仅产生 <ol> tag.

video($src[, $unsupportedMessage = ''[, $attributes = ''[, $tracks = [][, $indexPage = false]]]])

容许你从简单的或者原始码数组产生 HTML 影像元素。事例:

$tracks =
[
    track('subtitles_no.vtt', 'subtitles', 'no', 'Norwegian No'),
    track('subtitles_yes.vtt', 'subtitles', 'yes', 'Norwegian Yes')
];


echo video('test.mp4', 'Your browser does not support the video tag.', 'controls');


echo video
(
    'http://www.codeigniter.com/test.mp4',
    'Your browser does not support the video tag.',
    'controls',
    $tracks
);


echo video
(
    [
      source('movie.mp4', 'video/mp4', 'class="test"'),
      source('movie.ogg', 'video/ogg'),
      source('movie.mov', 'video/quicktime'),
      source('movie.ogv', 'video/ogv; codecs=dirac, speex')
    ],
    'Your browser does not support the video tag.',
    'class="test" controls',
    $tracks
 );

上文的编码将产生这样地 HTML 前端代码:

<video src="test.mp4" controls>
  Your browser does not support the video tag.
</video>


<video src="http://www.codeigniter.com/test.mp4" rel="external nofollow"  controls>
  <track src="subtitles_no.vtt" kind="subtitles" srclang="no" label="Norwegian No" />
  <track src="subtitles_yes.vtt" kind="subtitles" srclang="yes" label="Norwegian Yes" />
  Your browser does not support the video tag.
</video>


<video class="test" controls>
  <source src="movie.mp4" type="video/mp4" class="test" />
  <source src="movie.ogg" type="video/ogg" />
  <source src="movie.mov" type="video/quicktime" />
  <source src="movie.ogv" type="video/ogv; codecs=dirac, speex" />
  <track src="subtitles_no.vtt" kind="subtitles" srclang="no" label="Norwegian No" />
  <track src="subtitles_yes.vtt" kind="subtitles" srclang="yes" label="Norwegian Yes" />
  Your browser does not support the video tag.
</video>

audio($src[, $unsupportedMessage = ''[, $attributes = ''[, $tracks = [][, $indexPage = false]]]])

完全相似于 video(), 它仅仅产生 <audio> tag 代替 <video>.

source($src = ''[, $type = false[, $attributes = '']])

让你创建 HTML <source /> tags. 第一个参数包含起源 source. 事例:

echo source('movie.mp4', 'video/mp4', 'class="test"');
// <source src="movie.mp4" type="video/mp4" class="test" />

embed($src = ''[, $type = false[, $attributes = ''[, $indexPage = false]]])

让你创建 HTML <embed /> tags.第一参数包含 embed source. 事例:

echo embed('movie.mov', 'video/quicktime', 'class="test"');
// <embed src="movie.mov" type="video/quicktime" class="test"/>

object($data = ''[, $type = false[, $attributes = '']])

让你创建 HTML <object /> tags. 第一参数包含 object data. 事例:

echo object('movie.swf', 'application/x-shockwave-flash', 'class="test"');


echo object
(
    'movie.swf',
    'application/x-shockwave-flash',
    'class="test"',
    [
        param('foo', 'bar', 'ref', 'class="test"'),
        param('hello', 'world', 'ref', 'class="test"')
    ]
);

上文编码将产生这样的 HTML 前端代码:

<object data="movie.swf" class="test"></object>


<object data="movie.swf" class="test">
  <param name="foo" type="ref" value="bar" class="test" />
  <param name="hello" type="ref" value="world" class="test" />
</object>

param($name = ''[, $type = false[, $attributes = '']])

param source. 事例:

echo param('movie.mov', 'video/quicktime', 'class="test"');
// <param src="movie.mov" type="video/quicktime" class="test"/>

track($name = ''[, $type = false[, $attributes = '']])

产生一个跟踪元素去具体指定时间的轨迹。在 WebVVT 格式里轨迹已被格式化。事例:

echo track('subtitles_no.vtt', 'subtitles', 'no', 'Norwegian No');
// <track src="subtitles_no.vtt" kind="subtitles" srclang="no" label="Norwegian No" />

doctype([$type = 'html5'])

帮助你产生 document type 声明, 而 DTD’s. HTML 5 是默认使用的，但是许多 doctypes 是通用的。

事例:

echo doctype();
// <!DOCTYPE html>


echo doctype('html4-trans');
// <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">

接下来的是重定义 doctype 选择的目录。 这些是可设置的， 被从 application/Config/DocTypes.php 出栈,或者在你的 .env 结构里它们能被加载。