View::init() - Code Metrics - Inspection of "Removed duplicate handling for \Throwable and \Exc..." - yiisoft/yii2 - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — update-to-php-71 ( f475af )

by Alexander

created 2017-06-09 21:59 UTC

View::init() A

↳ Parent: View

Complexity

Conditions	4
Paths	4

Size

Total Lines	12
Code Lines	8

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	5.4042

Importance

Changes

Metric	Value
dl	0
loc	12
ccs	5
cts	9
cp	0.5556
rs	9.2
c	0
b	0
f	0
cc	4
eloc	8
nc	4
nop	0
crap	5.4042

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\base;

use Yii;
use yii\helpers\FileHelper;
use yii\widgets\Block;
use yii\widgets\ContentDecorator;
use yii\widgets\FragmentCache;

/**
 * View represents a view object in the MVC pattern.
 *
 * View provides a set of methods (e.g. [[render()]]) for rendering purpose.
 *
 * For more details and usage information on View, see the [guide article on views](guide:structure-views).
 *
 * @property string|bool $viewFile The view file currently being rendered. False if no view file is being
 * rendered. This property is read-only.
 *
 * @author Qiang Xue <[email protected]>
 * @since 2.0
 */
class View extends Component
{
    /**
     * @event Event an event that is triggered by [[beginPage()]].
     */
    const EVENT_BEGIN_PAGE = 'beginPage';
    /**
     * @event Event an event that is triggered by [[endPage()]].
     */
    const EVENT_END_PAGE = 'endPage';
    /**
     * @event ViewEvent an event that is triggered by [[renderFile()]] right before it renders a view file.
     */
    const EVENT_BEFORE_RENDER = 'beforeRender';
    /**
     * @event ViewEvent an event that is triggered by [[renderFile()]] right after it renders a view file.
     */
    const EVENT_AFTER_RENDER = 'afterRender';

    /**
     * @var ViewContextInterface the context under which the [[renderFile()]] method is being invoked.
     */
    public $context;
    /**
     * @var mixed custom parameters that are shared among view templates.
     */
    public $params = [];
    /**
     * @var array a list of available renderers indexed by their corresponding supported file extensions.
     * Each renderer may be a view renderer object or the configuration for creating the renderer object.
     * For example, the following configuration enables both Smarty and Twig view renderers:
     *
     * ```php
     * [
     *     'tpl' => ['class' => \yii\smarty\ViewRenderer::class],
     *     'twig' => ['class' => \yii\twig\ViewRenderer::class],
     * ]
     * ```
     *
     * If no renderer is available for the given view file, the view file will be treated as a normal PHP
     * and rendered via [[renderPhpFile()]].
     */
    public $renderers;
    /**
     * @var string the default view file extension. This will be appended to view file names if they don't have file extensions.
     */
    public $defaultExtension = 'php';
    /**
     * @var Theme|array|string the theme object or the configuration for creating the theme object.
     * If not set, it means theming is not enabled.
     */
    public $theme;
    /**
     * @var array a list of named output blocks. The keys are the block names and the values
     * are the corresponding block content. You can call [[beginBlock()]] and [[endBlock()]]
     * to capture small fragments of a view. They can be later accessed somewhere else
     * through this property.
     */
    public $blocks;
    /**
     * @var array a list of currently active fragment cache widgets. This property
     * is used internally to implement the content caching feature. Do not modify it directly.
     * @internal
     */
    public $cacheStack = [];
    /**
     * @var array a list of placeholders for embedding dynamic contents. This property
     * is used internally to implement the content caching feature. Do not modify it directly.
     * @internal
     */
    public $dynamicPlaceholders = [];

    /**
     * @var array the view files currently being rendered. There may be multiple view files being
     * rendered at a moment because one view may be rendered within another.
     */
    private $_viewFiles = [];


    /**
     * Initializes the view component.
     */
    public function init()
    {
        parent::init();
        if (is_array($this->theme)) {
            if (!isset($this->theme['class'])) {
                $this->theme['class'] = Theme::class;
            }
            $this->theme = Yii::createObject($this->theme);
        } elseif (is_string($this->theme)) {
            $this->theme = Yii::createObject($this->theme);
        }
    }

    /**
     * Renders a view.
     *
     * The view to be rendered can be specified in one of the following formats:
     *
     * - [path alias](guide:concept-aliases) (e.g. "@app/views/site/index");
     * - absolute path within application (e.g. "//site/index"): the view name starts with double slashes.
     *   The actual view file will be looked for under the [[Application::viewPath|view path]] of the application.
     * - absolute path within current module (e.g. "/site/index"): the view name starts with a single slash.
     *   The actual view file will be looked for under the [[Module::viewPath|view path]] of the [[Controller::module|current module]].
     * - relative view (e.g. "index"): the view name does not start with `@` or `/`. The corresponding view file will be
     *   looked for under the [[ViewContextInterface::getViewPath()|view path]] of the view `$context`.
     *   If `$context` is not given, it will be looked for under the directory containing the view currently
     *   being rendered (i.e., this happens when rendering a view within another view).
     *
     * @param string $view the view name.
     * @param array $params the parameters (name-value pairs) that will be extracted and made available in the view file.
     * @param object $context the context to be assigned to the view and can later be accessed via [[context]]
     * in the view. If the context implements [[ViewContextInterface]], it may also be used to locate
     * the view file corresponding to a relative view name.
     * @return string the rendering result
     * @throws ViewNotFoundException if the view file does not exist.
     * @throws InvalidCallException if the view cannot be resolved.
     * @see renderFile()
     */
    public function render($view, $params = [], $context = null)
    {
        $viewFile = $this->findViewFile($view, $context);
        return $this->renderFile($viewFile, $params, $context);
/**
 * @return array|string
 */
function returnsDifferentValues($x) {
    if ($x) {
        return 'foo';
    }

    return array();
}

$x = returnsDifferentValues($y);
if (is_array($x)) {
    // $x is an array.
}
    }

    /**
     * Finds the view file based on the given view name.
     * @param string $view the view name or the [path alias](guide:concept-aliases) of the view file. Please refer to [[render()]]
     * on how to specify this parameter.
     * @param object $context the context to be assigned to the view and can later be accessed via [[context]]
     * in the view. If the context implements [[ViewContextInterface]], it may also be used to locate
     * the view file corresponding to a relative view name.
     * @return string the view file path. Note that the file may not exist.
     * @throws InvalidCallException if a relative view name is given while there is no active context to
     * determine the corresponding view file.
     */
    protected function findViewFile($view, $context = null)
    {
        if (strncmp($view, '@', 1) === 0) {
            // e.g. "@app/views/main"
            $file = Yii::getAlias($view);
        } elseif (strncmp($view, '//', 2) === 0) {
            // e.g. "//layouts/main"
            $file = Yii::$app->getViewPath() . DIRECTORY_SEPARATOR . ltrim($view, '/');
        } elseif (strncmp($view, '/', 1) === 0) {
            // e.g. "/site/index"
            if (Yii::$app->controller !== null) {
                $file = Yii::$app->controller->module->getViewPath() . DIRECTORY_SEPARATOR . ltrim($view, '/');
            } else {
                throw new InvalidCallException("Unable to locate view file for view '$view': no active controller.");
            }
        } elseif ($context instanceof ViewContextInterface) {
            $file = $context->getViewPath() . DIRECTORY_SEPARATOR . $view;
        } elseif (($currentViewFile = $this->getViewFile()) !== false) {
            $file = dirname($currentViewFile) . DIRECTORY_SEPARATOR . $view;
        } else {
            throw new InvalidCallException("Unable to resolve view file for view '$view': no active view context.");
        }

        if (pathinfo($file, PATHINFO_EXTENSION) !== '') {
            return $file;
        }
        $path = $file . '.' . $this->defaultExtension;
        if ($this->defaultExtension !== 'php' && !is_file($path)) {
            $path = $file . '.php';
        }

        return $path;
    }

    /**
     * Renders a view file.
     *
     * If [[theme]] is enabled (not null), it will try to render the themed version of the view file as long
     * as it is available.
     *
     * The method will call [[FileHelper::localize()]] to localize the view file.
     *
     * If [[renderers|renderer]] is enabled (not null), the method will use it to render the view file.
     * Otherwise, it will simply include the view file as a normal PHP file, capture its output and
     * return it as a string.
     *
     * @param string $viewFile the view file. This can be either an absolute file path or an alias of it.
     * @param array $params the parameters (name-value pairs) that will be extracted and made available in the view file.
     * @param object $context the context that the view should use for rendering the view. If null,
     * existing [[context]] will be used.
     * @return string the rendering result
     * @throws ViewNotFoundException if the view file does not exist
     */
    public function renderFile($viewFile, $params = [], $context = null)
    {
        $viewFile = Yii::getAlias($viewFile);

        if ($this->theme !== null) {
            $viewFile = $this->theme->applyTo($viewFile);
        }
        if (is_file($viewFile)) {
            $viewFile = FileHelper::localize($viewFile);
        } else {
            throw new ViewNotFoundException("The view file does not exist: $viewFile");
        }

        $oldContext = $this->context;
        if ($context !== null) {
            $this->context = $context;
        }
        $output = '';
        $this->_viewFiles[] = $viewFile;

        if ($this->beforeRender($viewFile, $params)) {
            Yii::trace("Rendering view file: $viewFile", __METHOD__);
            $ext = pathinfo($viewFile, PATHINFO_EXTENSION);
            if (isset($this->renderers[$ext])) {
                if (is_array($this->renderers[$ext]) || is_string($this->renderers[$ext])) {
                    $this->renderers[$ext] = Yii::createObject($this->renderers[$ext]);
                }
                /* @var $renderer ViewRenderer */
                $renderer = $this->renderers[$ext];
                $output = $renderer->render($this, $viewFile, $params);
            } else {
                $output = $this->renderPhpFile($viewFile, $params);
            }
            $this->afterRender($viewFile, $params, $output);
        }

        array_pop($this->_viewFiles);
        $this->context = $oldContext;

        return $output;
    }

    /**
     * @return string|bool the view file currently being rendered. False if no view file is being rendered.
     */
    public function getViewFile()
    {
        return end($this->_viewFiles);
    }

    /**
     * This method is invoked right before [[renderFile()]] renders a view file.
     * The default implementation will trigger the [[EVENT_BEFORE_RENDER]] event.
     * If you override this method, make sure you call the parent implementation first.
     * @param string $viewFile the view file to be rendered.
     * @param array $params the parameter array passed to the [[render()]] method.
     * @return bool whether to continue rendering the view file.
     */
    public function beforeRender($viewFile, $params)
    {
        $event = new ViewEvent([
            'viewFile' => $viewFile,
            'params' => $params,
        ]);
        $this->trigger(self::EVENT_BEFORE_RENDER, $event);

        return $event->isValid;
    }

    /**
     * This method is invoked right after [[renderFile()]] renders a view file.
     * The default implementation will trigger the [[EVENT_AFTER_RENDER]] event.
     * If you override this method, make sure you call the parent implementation first.
     * @param string $viewFile the view file being rendered.
     * @param array $params the parameter array passed to the [[render()]] method.
     * @param string $output the rendering result of the view file. Updates to this parameter
     * will be passed back and returned by [[renderFile()]].
     */
    public function afterRender($viewFile, $params, &$output)
    {
        if ($this->hasEventHandlers(self::EVENT_AFTER_RENDER)) {
            $event = new ViewEvent([
                'viewFile' => $viewFile,
                'params' => $params,
                'output' => $output,
            ]);
            $this->trigger(self::EVENT_AFTER_RENDER, $event);
            $output = $event->output;
        }
    }

    /**
     * Renders a view file as a PHP script.
     *
     * This method treats the view file as a PHP script and includes the file.
     * It extracts the given parameters and makes them available in the view file.
     * The method captures the output of the included view file and returns it as a string.
     *
     * This method should mainly be called by view renderer or [[renderFile()]].
     *
     * @param string $_file_ the view file.
     * @param array $_params_ the parameters (name-value pairs) that will be extracted and made available in the view file.
     * @return string the rendering result
     */
    public function renderPhpFile($_file_, $_params_ = [])
    {
        $_obInitialLevel_ = ob_get_level();
        ob_start();
        ob_implicit_flush(false);
        extract($_params_, EXTR_OVERWRITE);
        try {
            require($_file_);
            return ob_get_clean();
        } catch (\Throwable $e) {

            while (ob_get_level() > $_obInitialLevel_) {
                if (!@ob_end_clean()) {
                    ob_clean();
                }
            }
            throw $e;
        }
    }

    /**
     * Renders dynamic content returned by the given PHP statements.
     * This method is mainly used together with content caching (fragment caching and page caching)
     * when some portions of the content (called *dynamic content*) should not be cached.
     * The dynamic content must be returned by some PHP statements. You can optionally pass
     * additional parameters that will be available as variables in the PHP statement:
     *
     * ```php
     * <?= $this->renderDynamic('return foo($myVar);', [
     *     'myVar' => $model->getMyComplexVar(),
     * ]) ?>
     * ```
     * @param string $statements the PHP statements for generating the dynamic content.
     * @param array $params the parameters (name-value pairs) that will be extracted and made
     * available in the $statement context. The parameters will be stored in the cache and be reused
     * each time $statement is executed. You should make sure, that these are safely serializable.
     * @throws \yii\base\ErrorException if the statement throws an exception in eval()
     * @return string the placeholder of the dynamic content, or the dynamic content if there is no
     * active content cache currently.
     */
    public function renderDynamic($statements, array $params = [])
    {
        if (!empty($params)) {
            $statements = 'extract(unserialize(\'' . serialize($params) . '\'));' . $statements;
        }
        if (!empty($this->cacheStack)) {
            $n = count($this->dynamicPlaceholders);
            $placeholder = "<![CDATA[YII-DYNAMIC-$n]]>";
            $this->addDynamicPlaceholder($placeholder, $statements);

            return $placeholder;
        }
        return $this->evaluateDynamicContent($statements);
    }

    /**
     * Adds a placeholder for dynamic content.
     * This method is internally used.
     * @param string $placeholder the placeholder name
     * @param string $statements the PHP statements for generating the dynamic content
     */
    public function addDynamicPlaceholder($placeholder, $statements)
    {
        foreach ($this->cacheStack as $cache) {
            $cache->dynamicPlaceholders[$placeholder] = $statements;
        }
        $this->dynamicPlaceholders[$placeholder] = $statements;
    }

    /**
     * Evaluates the given PHP statements.
     * This method is mainly used internally to implement dynamic content feature.
     * @param string $statements the PHP statements to be evaluated.
     * @return mixed the return value of the PHP statements.
     */
    public function evaluateDynamicContent($statements)
    {
        return eval($statements);
    }

    /**
     * Begins recording a block.
     * This method is a shortcut to beginning [[Block]]
     * @param string $id the block ID.
     * @param bool $renderInPlace whether to render the block content in place.
     * Defaults to false, meaning the captured block will not be displayed.
     * @return Block the Block widget instance
     */
    public function beginBlock($id, $renderInPlace = false)
    {
        return Block::begin([
            'id' => $id,
            'renderInPlace' => $renderInPlace,
            'view' => $this,
        ]);
    }

    /**
     * Ends recording a block.
     */
    public function endBlock()
    {
        Block::end();
    }

    /**
     * Begins the rendering of content that is to be decorated by the specified view.
     * This method can be used to implement nested layout. For example, a layout can be embedded
     * in another layout file specified as '@app/views/layouts/base.php' like the following:
     *
     * ```php
     * <?php $this->beginContent('@app/views/layouts/base.php'); ?>
     * //...layout content here...
     * <?php $this->endContent(); ?>
     * ```
     *
     * @param string $viewFile the view file that will be used to decorate the content enclosed by this widget.
     * This can be specified as either the view file path or [path alias](guide:concept-aliases).
     * @param array $params the variables (name => value) to be extracted and made available in the decorative view.
     * @return ContentDecorator the ContentDecorator widget instance
     * @see ContentDecorator
     */
    public function beginContent($viewFile, $params = [])
    {
        return ContentDecorator::begin([
            'viewFile' => $viewFile,
            'params' => $params,
            'view' => $this,
        ]);
    }

    /**
     * Ends the rendering of content.
     */
    public function endContent()
    {
        ContentDecorator::end();
    }

    /**
     * Begins fragment caching.
     * This method will display cached content if it is available.
     * If not, it will start caching and would expect an [[endCache()]]
     * call to end the cache and save the content into cache.
     * A typical usage of fragment caching is as follows,
     *
     * ```php
     * if ($this->beginCache($id)) {
     *     // ...generate content here
     *     $this->endCache();
     * }
     * ```
     *
     * @param string $id a unique ID identifying the fragment to be cached.
     * @param array $properties initial property values for [[FragmentCache]]
     * @return bool whether you should generate the content for caching.
     * False if the cached version is available.
     */
    public function beginCache($id, $properties = [])
    {
        $properties['id'] = $id;
        $properties['view'] = $this;
        /* @var $cache FragmentCache */
        $cache = FragmentCache::begin($properties);
        if ($cache->getCachedContent() !== false) {
            $this->endCache();

            return false;
        }
        return true;
    }

    /**
     * Ends fragment caching.
     */
    public function endCache()
    {
        FragmentCache::end();
    }

    /**
     * Marks the beginning of a page.
     */
    public function beginPage()
    {
        ob_start();
        ob_implicit_flush(false);

        $this->trigger(self::EVENT_BEGIN_PAGE);
    }

    /**
     * Marks the ending of a page.
     */
    public function endPage()
    {
        $this->trigger(self::EVENT_END_PAGE);
        ob_end_flush();
    }
}


1		<?php
2		/**
3		* @link http://www.yiiframework.com/
4		* @copyright Copyright (c) 2008 Yii Software LLC
5		* @license http://www.yiiframework.com/license/
6		*/
7
8		namespace yii\base;
9
10		use Yii;
11		use yii\helpers\FileHelper;
12		use yii\widgets\Block;
13		use yii\widgets\ContentDecorator;
14		use yii\widgets\FragmentCache;
15
16		/**
17		* View represents a view object in the MVC pattern.
18		*
19		* View provides a set of methods (e.g. [[render()]]) for rendering purpose.
20		*
21		* For more details and usage information on View, see the [guide article on views](guide:structure-views).
22		*
23		* @property string\|bool $viewFile The view file currently being rendered. False if no view file is being
24		* rendered. This property is read-only.
25		*
26		* @author Qiang Xue <[email protected]>
27		* @since 2.0
28		*/
29		class View extends Component
30		{
31		/**
32		* @event Event an event that is triggered by [[beginPage()]].
33		*/
34		const EVENT_BEGIN_PAGE = 'beginPage';
35		/**
36		* @event Event an event that is triggered by [[endPage()]].
37		*/
38		const EVENT_END_PAGE = 'endPage';
39		/**
40		* @event ViewEvent an event that is triggered by [[renderFile()]] right before it renders a view file.
41		*/
42		const EVENT_BEFORE_RENDER = 'beforeRender';
43		/**
44		* @event ViewEvent an event that is triggered by [[renderFile()]] right after it renders a view file.
45		*/
46		const EVENT_AFTER_RENDER = 'afterRender';
47
48		/**
49		* @var ViewContextInterface the context under which the [[renderFile()]] method is being invoked.
50		*/
51		public $context;
52		/**
53		* @var mixed custom parameters that are shared among view templates.
54		*/
55		public $params = [];
56		/**
57		* @var array a list of available renderers indexed by their corresponding supported file extensions.
58		* Each renderer may be a view renderer object or the configuration for creating the renderer object.
59		* For example, the following configuration enables both Smarty and Twig view renderers:
60		*
61		* ```php
62		* [
63		* 'tpl' => ['class' => \yii\smarty\ViewRenderer::class],
64		* 'twig' => ['class' => \yii\twig\ViewRenderer::class],
65		* ]
66		* ```
67		*
68		* If no renderer is available for the given view file, the view file will be treated as a normal PHP
69		* and rendered via [[renderPhpFile()]].
70		*/
71		public $renderers;
72		/**
73		* @var string the default view file extension. This will be appended to view file names if they don't have file extensions.
74		*/
75		public $defaultExtension = 'php';
76		/**
77		* @var Theme\|array\|string the theme object or the configuration for creating the theme object.
78		* If not set, it means theming is not enabled.
79		*/
80		public $theme;
81		/**
82		* @var array a list of named output blocks. The keys are the block names and the values
83		* are the corresponding block content. You can call [[beginBlock()]] and [[endBlock()]]
84		* to capture small fragments of a view. They can be later accessed somewhere else
85		* through this property.
86		*/
87		public $blocks;
88		/**
89		* @var array a list of currently active fragment cache widgets. This property
90		* is used internally to implement the content caching feature. Do not modify it directly.
91		* @internal
92		*/
93		public $cacheStack = [];
94		/**
95		* @var array a list of placeholders for embedding dynamic contents. This property
96		* is used internally to implement the content caching feature. Do not modify it directly.
97		* @internal
98		*/
99		public $dynamicPlaceholders = [];
100
101		/**
102		* @var array the view files currently being rendered. There may be multiple view files being
103		* rendered at a moment because one view may be rendered within another.
104		*/
105		private $_viewFiles = [];
106
107
108		/**
109		* Initializes the view component.
110		*/
111	143	public function init()
112		{
113	143	parent::init();
114	143	if (is_array($this->theme)) {
115		if (!isset($this->theme['class'])) {
116		$this->theme['class'] = Theme::class;
117		}
118		$this->theme = Yii::createObject($this->theme);
119	143	} elseif (is_string($this->theme)) {
120		$this->theme = Yii::createObject($this->theme);
121		}
122	143	}
123
124		/**
125		* Renders a view.
126		*
127		* The view to be rendered can be specified in one of the following formats:
128		*
129		* - [path alias](guide:concept-aliases) (e.g. "@app/views/site/index");
130		* - absolute path within application (e.g. "//site/index"): the view name starts with double slashes.
131		* The actual view file will be looked for under the [[Application::viewPath\|view path]] of the application.
132		* - absolute path within current module (e.g. "/site/index"): the view name starts with a single slash.
133		* The actual view file will be looked for under the [[Module::viewPath\|view path]] of the [[Controller::module\|current module]].
134		* - relative view (e.g. "index"): the view name does not start with `@` or `/`. The corresponding view file will be
135		* looked for under the [[ViewContextInterface::getViewPath()\|view path]] of the view `$context`.
136		* If `$context` is not given, it will be looked for under the directory containing the view currently
137		* being rendered (i.e., this happens when rendering a view within another view).
138		*
139		* @param string $view the view name.
140		* @param array $params the parameters (name-value pairs) that will be extracted and made available in the view file.
141		* @param object $context the context to be assigned to the view and can later be accessed via [[context]]
142		* in the view. If the context implements [[ViewContextInterface]], it may also be used to locate
143		* the view file corresponding to a relative view name.
144		* @return string the rendering result
145		* @throws ViewNotFoundException if the view file does not exist.
146		* @throws InvalidCallException if the view cannot be resolved.
147		* @see renderFile()
148		*/
149	32	public function render($view, $params = [], $context = null)
150		{
151	32	$viewFile = $this->findViewFile($view, $context);
152	32	return $this->renderFile($viewFile, $params, $context);
		0 ignored issues – show Bug introduced 2016-02-04 14:20 UTC by Report Bug Copy Issue Report It seems like `$viewFile` defined by `$this->findViewFile($view, $context)` on line `151` can also be of type `boolean`; however, `yii\base\View::renderFile()` does only seem to accept `string`, maybe add an additional type check? If a method or function can return multiple different values and unless you are sure that you only can receive a single value in this context, we recommend to add an additional type check: /** * @return array\|string */ function returnsDifferentValues($x) { if ($x) { return 'foo'; } return array(); } $x = returnsDifferentValues($y); if (is_array($x)) { // $x is an array. } If this a common case that PHP Analyzer should handle natively, please let us know by opening an issue. Loading history...
153		}
154
155		/**
156		* Finds the view file based on the given view name.
157		* @param string $view the view name or the [path alias](guide:concept-aliases) of the view file. Please refer to [[render()]]
158		* on how to specify this parameter.
159		* @param object $context the context to be assigned to the view and can later be accessed via [[context]]
160		* in the view. If the context implements [[ViewContextInterface]], it may also be used to locate
161		* the view file corresponding to a relative view name.
162		* @return string the view file path. Note that the file may not exist.
163		* @throws InvalidCallException if a relative view name is given while there is no active context to
164		* determine the corresponding view file.
165		*/
166	32	protected function findViewFile($view, $context = null)
167		{
168	32	if (strncmp($view, '@', 1) === 0) {
169		// e.g. "@app/views/main"
170	21	$file = Yii::getAlias($view);
171	11	} elseif (strncmp($view, '//', 2) === 0) {
172		// e.g. "//layouts/main"
173		$file = Yii::$app->getViewPath() . DIRECTORY_SEPARATOR . ltrim($view, '/');
174	11	} elseif (strncmp($view, '/', 1) === 0) {
175		// e.g. "/site/index"
176		if (Yii::$app->controller !== null) {
177		$file = Yii::$app->controller->module->getViewPath() . DIRECTORY_SEPARATOR . ltrim($view, '/');
178		} else {
179		throw new InvalidCallException("Unable to locate view file for view '$view': no active controller.");
180		}
181	11	} elseif ($context instanceof ViewContextInterface) {
182	6	$file = $context->getViewPath() . DIRECTORY_SEPARATOR . $view;
183	5	} elseif (($currentViewFile = $this->getViewFile()) !== false) {
184	5	$file = dirname($currentViewFile) . DIRECTORY_SEPARATOR . $view;
185		} else {
186		throw new InvalidCallException("Unable to resolve view file for view '$view': no active view context.");
187		}
188
189	32	if (pathinfo($file, PATHINFO_EXTENSION) !== '') {
190	20	return $file;
191		}
192	12	$path = $file . '.' . $this->defaultExtension;
193	12	if ($this->defaultExtension !== 'php' && !is_file($path)) {
194		$path = $file . '.php';
195		}
196
197	12	return $path;
198		}
199
200		/**
201		* Renders a view file.
202		*
203		* If [[theme]] is enabled (not null), it will try to render the themed version of the view file as long
204		* as it is available.
205		*
206		* The method will call [[FileHelper::localize()]] to localize the view file.
207		*
208		* If [[renderers\|renderer]] is enabled (not null), the method will use it to render the view file.
209		* Otherwise, it will simply include the view file as a normal PHP file, capture its output and
210		* return it as a string.
211		*
212		* @param string $viewFile the view file. This can be either an absolute file path or an alias of it.
213		* @param array $params the parameters (name-value pairs) that will be extracted and made available in the view file.
214		* @param object $context the context that the view should use for rendering the view. If null,
215		* existing [[context]] will be used.
216		* @return string the rendering result
217		* @throws ViewNotFoundException if the view file does not exist
218		*/
219	71	public function renderFile($viewFile, $params = [], $context = null)
220		{
221	71	$viewFile = Yii::getAlias($viewFile);
222
223	71	if ($this->theme !== null) {
224		$viewFile = $this->theme->applyTo($viewFile);
225		}
226	71	if (is_file($viewFile)) {
227	70	$viewFile = FileHelper::localize($viewFile);
228		} else {
229	1	throw new ViewNotFoundException("The view file does not exist: $viewFile");
230		}
231
232	70	$oldContext = $this->context;
233	70	if ($context !== null) {
234	23	$this->context = $context;
235		}
236	70	$output = '';
237	70	$this->_viewFiles[] = $viewFile;
238
239	70	if ($this->beforeRender($viewFile, $params)) {
240	70	Yii::trace("Rendering view file: $viewFile", __METHOD__);
241	70	$ext = pathinfo($viewFile, PATHINFO_EXTENSION);
242	70	if (isset($this->renderers[$ext])) {
243		if (is_array($this->renderers[$ext]) \|\| is_string($this->renderers[$ext])) {
244		$this->renderers[$ext] = Yii::createObject($this->renderers[$ext]);
245		}
246		/* @var $renderer ViewRenderer */
247		$renderer = $this->renderers[$ext];
248		$output = $renderer->render($this, $viewFile, $params);
249		} else {
250	70	$output = $this->renderPhpFile($viewFile, $params);
251		}
252	70	$this->afterRender($viewFile, $params, $output);
253		}
254
255	70	array_pop($this->_viewFiles);
256	70	$this->context = $oldContext;
257
258	70	return $output;
259		}
260
261		/**
262		* @return string\|bool the view file currently being rendered. False if no view file is being rendered.
263		*/
264	5	public function getViewFile()
265		{
266	5	return end($this->_viewFiles);
267		}
268
269		/**
270		* This method is invoked right before [[renderFile()]] renders a view file.
271		* The default implementation will trigger the [[EVENT_BEFORE_RENDER]] event.
272		* If you override this method, make sure you call the parent implementation first.
273		* @param string $viewFile the view file to be rendered.
274		* @param array $params the parameter array passed to the [[render()]] method.
275		* @return bool whether to continue rendering the view file.
276		*/
277	70	public function beforeRender($viewFile, $params)
278		{
279	70	$event = new ViewEvent([
280	70	'viewFile' => $viewFile,
281	70	'params' => $params,
282		]);
283	70	$this->trigger(self::EVENT_BEFORE_RENDER, $event);
284
285	70	return $event->isValid;
286		}
287
288		/**
289		* This method is invoked right after [[renderFile()]] renders a view file.
290		* The default implementation will trigger the [[EVENT_AFTER_RENDER]] event.
291		* If you override this method, make sure you call the parent implementation first.
292		* @param string $viewFile the view file being rendered.
293		* @param array $params the parameter array passed to the [[render()]] method.
294		* @param string $output the rendering result of the view file. Updates to this parameter
295		* will be passed back and returned by [[renderFile()]].
296		*/
297	70	public function afterRender($viewFile, $params, &$output)
298		{
299	70	if ($this->hasEventHandlers(self::EVENT_AFTER_RENDER)) {
300		$event = new ViewEvent([
301		'viewFile' => $viewFile,
302		'params' => $params,
303		'output' => $output,
304		]);
305		$this->trigger(self::EVENT_AFTER_RENDER, $event);
306		$output = $event->output;
307		}
308	70	}
309
310		/**
311		* Renders a view file as a PHP script.
312		*
313		* This method treats the view file as a PHP script and includes the file.
314		* It extracts the given parameters and makes them available in the view file.
315		* The method captures the output of the included view file and returns it as a string.
316		*
317		* This method should mainly be called by view renderer or [[renderFile()]].
318		*
319		* @param string $_file_ the view file.
320		* @param array $_params_ the parameters (name-value pairs) that will be extracted and made available in the view file.
321		* @return string the rendering result
322		*/
323	70	public function renderPhpFile($_file_, $_params_ = [])
324		{
325	70	$_obInitialLevel_ = ob_get_level();
326	70	ob_start();
327	70	ob_implicit_flush(false);
328	70	extract($_params_, EXTR_OVERWRITE);
329		try {
330	70	require($_file_);
331	70	return ob_get_clean();
332	1	} catch (\Throwable $e) {
		0 ignored issues – show Bug introduced 2017-06-01 15:31 UTC by Report Bug Copy Issue Report The class `Throwable` does not exist. Did you forget a USE statement, or did you not list all dependencies? Scrutinizer analyzes your `composer.json`/`composer.lock` file if available to determine the classes, and functions that are defined by your dependencies. It seems like the listed class was neither found in your dependencies, nor was it found in the analyzed files in your repository. If you are using some other form of dependency management, you might want to disable this analysis. Loading history...
333	1	while (ob_get_level() > $_obInitialLevel_) {
334	1	if (!@ob_end_clean()) {
335		ob_clean();
336		}
337		}
338	1	throw $e;
339		}
340		}
341
342		/**
343		* Renders dynamic content returned by the given PHP statements.
344		* This method is mainly used together with content caching (fragment caching and page caching)
345		* when some portions of the content (called dynamic content) should not be cached.
346		* The dynamic content must be returned by some PHP statements. You can optionally pass
347		* additional parameters that will be available as variables in the PHP statement:
348		*
349		* ```php
350		* <?= $this->renderDynamic('return foo($myVar);', [
351		* 'myVar' => $model->getMyComplexVar(),
352		* ]) ?>
353		* ```
354		* @param string $statements the PHP statements for generating the dynamic content.
355		* @param array $params the parameters (name-value pairs) that will be extracted and made
356		* available in the $statement context. The parameters will be stored in the cache and be reused
357		* each time $statement is executed. You should make sure, that these are safely serializable.
358		* @throws \yii\base\ErrorException if the statement throws an exception in eval()
359		* @return string the placeholder of the dynamic content, or the dynamic content if there is no
360		* active content cache currently.
361		*/
362	21	public function renderDynamic($statements, array $params = [])
363		{
364	21	if (!empty($params)) {
365	1	$statements = 'extract(unserialize(\'' . serialize($params) . '\'));' . $statements;
366		}
367	21	if (!empty($this->cacheStack)) {
368	16	$n = count($this->dynamicPlaceholders);
369	16	$placeholder = "<![CDATA[YII-DYNAMIC-$n]]>";
370	16	$this->addDynamicPlaceholder($placeholder, $statements);
371
372	16	return $placeholder;
373		}
374	5	return $this->evaluateDynamicContent($statements);
375		}
376
377		/**
378		* Adds a placeholder for dynamic content.
379		* This method is internally used.
380		* @param string $placeholder the placeholder name
381		* @param string $statements the PHP statements for generating the dynamic content
382		*/
383	16	public function addDynamicPlaceholder($placeholder, $statements)
384		{
385	16	foreach ($this->cacheStack as $cache) {
386	16	$cache->dynamicPlaceholders[$placeholder] = $statements;
387		}
388	16	$this->dynamicPlaceholders[$placeholder] = $statements;
389	16	}
390
391		/**
392		* Evaluates the given PHP statements.
393		* This method is mainly used internally to implement dynamic content feature.
394		* @param string $statements the PHP statements to be evaluated.
395		* @return mixed the return value of the PHP statements.
396		*/
397	20	public function evaluateDynamicContent($statements)
398		{
399	20	return eval($statements);
400		}
401
402		/**
403		* Begins recording a block.
404		* This method is a shortcut to beginning [[Block]]
405		* @param string $id the block ID.
406		* @param bool $renderInPlace whether to render the block content in place.
407		* Defaults to false, meaning the captured block will not be displayed.
408		* @return Block the Block widget instance
409		*/
410		public function beginBlock($id, $renderInPlace = false)
411		{
412		return Block::begin([
413		'id' => $id,
414		'renderInPlace' => $renderInPlace,
415		'view' => $this,
416		]);
417		}
418
419		/**
420		* Ends recording a block.
421		*/
422		public function endBlock()
423		{
424		Block::end();
425		}
426
427		/**
428		* Begins the rendering of content that is to be decorated by the specified view.
429		* This method can be used to implement nested layout. For example, a layout can be embedded
430		* in another layout file specified as '@app/views/layouts/base.php' like the following:
431		*
432		* ```php
433		* <?php $this->beginContent('@app/views/layouts/base.php'); ?>
434		* //...layout content here...
435		* <?php $this->endContent(); ?>
436		* ```
437		*
438		* @param string $viewFile the view file that will be used to decorate the content enclosed by this widget.
439		* This can be specified as either the view file path or [path alias](guide:concept-aliases).
440		* @param array $params the variables (name => value) to be extracted and made available in the decorative view.
441		* @return ContentDecorator the ContentDecorator widget instance
442		* @see ContentDecorator
443		*/
444		public function beginContent($viewFile, $params = [])
445		{
446		return ContentDecorator::begin([
447		'viewFile' => $viewFile,
448		'params' => $params,
449		'view' => $this,
450		]);
451		}
452
453		/**
454		* Ends the rendering of content.
455		*/
456		public function endContent()
457		{
458		ContentDecorator::end();
459		}
460
461		/**
462		* Begins fragment caching.
463		* This method will display cached content if it is available.
464		* If not, it will start caching and would expect an [[endCache()]]
465		* call to end the cache and save the content into cache.
466		* A typical usage of fragment caching is as follows,
467		*
468		* ```php
469		* if ($this->beginCache($id)) {
470		* // ...generate content here
471		* $this->endCache();
472		* }
473		* ```
474		*
475		* @param string $id a unique ID identifying the fragment to be cached.
476		* @param array $properties initial property values for [[FragmentCache]]
477		* @return bool whether you should generate the content for caching.
478		* False if the cached version is available.
479		*/
480	7	public function beginCache($id, $properties = [])
481		{
482	7	$properties['id'] = $id;
483	7	$properties['view'] = $this;
484		/* @var $cache FragmentCache */
485	7	$cache = FragmentCache::begin($properties);
486	7	if ($cache->getCachedContent() !== false) {
487	4	$this->endCache();
488
489	4	return false;
490		}
491	7	return true;
492		}
493
494		/**
495		* Ends fragment caching.
496		*/
497	7	public function endCache()
498		{
499	7	FragmentCache::end();
500	7	}
501
502		/**
503		* Marks the beginning of a page.
504		*/
505	48	public function beginPage()
506		{
507	48	ob_start();
508	48	ob_implicit_flush(false);
509
510	48	$this->trigger(self::EVENT_BEGIN_PAGE);
511	48	}
512
513		/**
514		* Marks the ending of a page.
515		*/
516		public function endPage()
517		{
518		$this->trigger(self::EVENT_END_PAGE);
519		ob_end_flush();
520		}
521		}
522

yiisoft / yii2

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