3 Breadcrumbs are used for indicating where in a sitemap a user is currently browsing, and are
4 typically rendered like the following:
7 You are here: Home > Products > FantasticProduct 1.0
10 The `breadcrumbs()` helper follows the [Breadcrumbs Pattern](http://developer.yahoo.com/ypatterns/pattern.php?pattern=breadcrumbs)
11 as outlined in the Yahoo! Design Pattern Library, and allows simple
12 customization (minimum/maximum depth, indentation, separator, and whether the
13 last element should be linked), or rendering using a partial view script.
15 The Breadcrumbs helper finds the deepest active page in a navigation container,
16 and renders an upwards path to the root. For MVC pages, the "activeness" of a
17 page is determined by inspecting the request object, as stated in the section on
18 [MVC pages](../pages.md#mvc-pages).
20 The helper sets the `minDepth` property to 1 by default, meaning breadcrumbs
21 will not be rendered if the deepest active page is a root page. If `maxDepth` is
22 specified, the helper will stop rendering when at the specified depth (e.g. stop
23 at level 2 even if the deepest active page is on level 3).
25 Methods in the breadcrumbs helper:
27 Method signature | Description
28 ------------------------------------------ | -----------
29 `getSeparator() : string` | Retrieves the separator string to use between breadcrumbs; default is ` > `.
30 `setSeparator(string $separator) : self` | Set the separator string to use between breadcrumbs.
31 `getLinkLast() : bool` | Retrieve the flag indicating whether the last breadcrumb should be rendered as an anchor; defaults to `false`.
32 `setLinkLast(bool $flag) : self` | Set the flag indicating whether the last breadcrumb should be rendered as an anchor.
33 `getPartial() : string|array` | Retrieve a partial view script that should be used for rendering breadcrumbs. If a partial view script is set, the helper's `render()` method will use the `renderPartial()` method. The helper expects the partial to be a `string` or an `array` with two elements. If the partial is a `string`, it denotes the name of the partial script to use. If it is an `array`, the first element will be used as the name of the partial view script, and the second element is the module where the script is found.
34 `setPartial(string|array $partial) : self` | Set the partial view script to use when rendering breadcrumbs; see `getPartial()` for acceptable values.
35 `renderStraight()` | The default render method used when no partial view script is present.
36 `renderPartial()` | Used for rendering using a partial view script.
40 This example shows how to render breadcrumbs with default settings.
42 In a view script or layout:
45 <?= $this->navigation()->breadcrumbs(); ?>
48 The call above takes advantage of the magic `__toString()` method, and is
52 <?= $this->navigation()->breadcrumbs()->render(); ?>
58 <a href="/products">Products</a> > <a href="/products/server">Foo Server</a> > FAQ
61 ## Specifying indentation
63 This example shows how to render breadcrumbs with initial indentation.
65 Rendering with 8 spaces indentation:
68 <?= $this->navigation()->breadcrumbs()->setIndent(8) ?>
74 <a href="/products">Products</a> > <a href="/products/server">Foo Server</a> > FAQ
79 This example shows how to customize breadcrumbs output by specifying multiple options.
81 In a view script or layout:
84 <?= $this->navigation()->breadcrumbs()
85 ->setLinkLast(true) // link last page
86 ->setMaxDepth(1) // stop at level 1
87 ->setSeparator(' ▶' . PHP_EOL); // cool separator with newline
94 <a href="/products">Products</a> ▶
95 <a href="/products/server">Foo Server</a>
98 Setting minimum depth required to render breadcrumbs:
101 <?= $this->navigation()->breadcrumbs()->setMinDepth(10) ?>
104 Output: Nothing, because the deepest active page is not at level 10 or deeper.
106 ## Rendering using a partial view script
108 This example shows how to render customized breadcrumbs using a partial vew
109 script. By calling `setPartial()`, you can specify a partial view script that
110 will be used when calling `render()`. When a partial is specified, the
111 `renderPartial()` method will be called when emitting the breadcrumbs. This
112 method will find the deepest active page and pass an array of pages that leads
113 to the active page to the partial view script.
118 echo $this->navigation()->breadcrumbs()
119 ->setPartial('my-module/partials/breadcrumbs');
122 Contents of `module/MyModule/view/my-module/partials/breadcrumbs.phtml`:
125 <?= implode(', ', array_map(function ($a) {
126 return $a->getLabel();
127 }, $this->pages)); ?>
133 Products, Foo Server, FAQ