vendor/twig/twig/src/Template.php line 345
<?php/** This file is part of Twig.** (c) Fabien Potencier* (c) Armin Ronacher** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Twig;use Twig\Error\Error;use Twig\Error\LoaderError;use Twig\Error\RuntimeError;/*** Default base class for compiled templates.** This class is an implementation detail of how template compilation currently* works, which might change. It should never be used directly. Use $twig->load()* instead, which returns an instance of \Twig\TemplateWrapper.** @author Fabien Potencier <fabien@symfony.com>** @internal*/abstract class Template{public const ANY_CALL = 'any';public const ARRAY_CALL = 'array';public const METHOD_CALL = 'method';protected $parent;protected $parents = [];protected $env;protected $blocks = [];protected $traits = [];protected $extensions = [];protected $sandbox;private $useYield;public function __construct(Environment $env){$this->env = $env;$this->useYield = $env->useYield();$this->extensions = $env->getExtensions();}/*** Returns the template name.** @return string The template name*/abstract public function getTemplateName();/*** Returns debug information about the template.** @return array Debug information*/abstract public function getDebugInfo();/*** Returns information about the original template source code.** @return Source*/abstract public function getSourceContext();/*** Returns the parent template.** This method is for internal use only and should never be called* directly.** @return self|TemplateWrapper|false The parent template or false if there is no parent*/public function getParent(array $context){if (null !== $this->parent) {return $this->parent;}try {if (!$parent = $this->doGetParent($context)) {return false;}if ($parent instanceof self || $parent instanceof TemplateWrapper) {return $this->parents[$parent->getSourceContext()->getName()] = $parent;}if (!isset($this->parents[$parent])) {$this->parents[$parent] = $this->loadTemplate($parent);}} catch (LoaderError $e) {$e->setSourceContext(null);$e->guess();throw $e;}return $this->parents[$parent];}protected function doGetParent(array $context){return false;}public function isTraitable(){return true;}/*** Displays a parent block.** This method is for internal use only and should never be called* directly.** @param string $name The block name to display from the parent* @param array $context The context* @param array $blocks The current set of blocks*/public function displayParentBlock($name, array $context, array $blocks = []){foreach ($this->yieldParentBlock($name, $context, $blocks) as $data) {echo $data;}}/*** Displays a block.** This method is for internal use only and should never be called* directly.** @param string $name The block name to display* @param array $context The context* @param array $blocks The current set of blocks* @param bool $useBlocks Whether to use the current set of blocks*/public function displayBlock($name, array $context, array $blocks = [], $useBlocks = true, ?self $templateContext = null){foreach ($this->yieldBlock($name, $context, $blocks, $useBlocks, $templateContext) as $data) {echo $data;}}/*** Renders a parent block.** This method is for internal use only and should never be called* directly.** @param string $name The block name to render from the parent* @param array $context The context* @param array $blocks The current set of blocks** @return string The rendered block*/public function renderParentBlock($name, array $context, array $blocks = []){$content = '';foreach ($this->yieldParentBlock($name, $context, $blocks) as $data) {$content .= $data;}return $content;}/*** Renders a block.** This method is for internal use only and should never be called* directly.** @param string $name The block name to render* @param array $context The context* @param array $blocks The current set of blocks* @param bool $useBlocks Whether to use the current set of blocks** @return string The rendered block*/public function renderBlock($name, array $context, array $blocks = [], $useBlocks = true){$content = '';foreach ($this->yieldBlock($name, $context, $blocks, $useBlocks) as $data) {$content .= $data;}return $content;}/*** Returns whether a block exists or not in the current context of the template.** This method checks blocks defined in the current template* or defined in "used" traits or defined in parent templates.** @param string $name The block name* @param array $context The context* @param array $blocks The current set of blocks** @return bool true if the block exists, false otherwise*/public function hasBlock($name, array $context, array $blocks = []){if (isset($blocks[$name])) {return $blocks[$name][0] instanceof self;}if (isset($this->blocks[$name])) {return true;}if ($parent = $this->getParent($context)) {return $parent->hasBlock($name, $context);}return false;}/*** Returns all block names in the current context of the template.** This method checks blocks defined in the current template* or defined in "used" traits or defined in parent templates.** @param array $context The context* @param array $blocks The current set of blocks** @return array An array of block names*/public function getBlockNames(array $context, array $blocks = []){$names = array_merge(array_keys($blocks), array_keys($this->blocks));if ($parent = $this->getParent($context)) {$names = array_merge($names, $parent->getBlockNames($context));}return array_unique($names);}/*** @param string|TemplateWrapper|array<string|TemplateWrapper> $template** @return self|TemplateWrapper*/protected function loadTemplate($template, $templateName = null, $line = null, $index = null){try {if (\is_array($template)) {return $this->env->resolveTemplate($template);}if ($template instanceof TemplateWrapper) {return $template;}if ($template instanceof self) {trigger_deprecation('twig/twig', '3.9', 'Passing a "%s" instance to "%s" is deprecated.', self::class, __METHOD__);return $template;}if ($template === $this->getTemplateName()) {$class = static::class;if (false !== $pos = strrpos($class, '___', -1)) {$class = substr($class, 0, $pos);}} else {$class = $this->env->getTemplateClass($template);}return $this->env->loadTemplate($class, $template, $index);} catch (Error $e) {if (!$e->getSourceContext()) {$e->setSourceContext($templateName ? new Source('', $templateName) : $this->getSourceContext());}if ($e->getTemplateLine() > 0) {throw $e;}if (!$line) {$e->guess();} else {$e->setTemplateLine($line);}throw $e;}}/*** @internal** @return self*/public function unwrap(){return $this;}/*** Returns all blocks.** This method is for internal use only and should never be called* directly.** @return array An array of blocks*/public function getBlocks(){return $this->blocks;}public function display(array $context, array $blocks = []): void{foreach ($this->yield($context, $blocks) as $data) {echo $data;}}public function render(array $context): string{$content = '';foreach ($this->yield($context) as $data) {$content .= $data;}return $content;}/*** @return iterable<string>*/public function yield(array $context, array $blocks = []): iterable{$context = $this->env->mergeGlobals($context);$blocks = array_merge($this->blocks, $blocks);try {if ($this->useYield) {yield from $this->doDisplay($context, $blocks);return;}$level = ob_get_level();ob_start();foreach ($this->doDisplay($context, $blocks) as $data) {if (ob_get_length()) {$data = ob_get_clean().$data;ob_start();}yield $data;}if (ob_get_length()) {yield ob_get_clean();}} catch (Error $e) {if (!$e->getSourceContext()) {$e->setSourceContext($this->getSourceContext());}// this is mostly useful for \Twig\Error\LoaderError exceptions// see \Twig\Error\LoaderErrorif (-1 === $e->getTemplateLine()) {$e->guess();}throw $e;} catch (\Throwable $e) {$e = new RuntimeError(\sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $this->getSourceContext(), $e);$e->guess();throw $e;} finally {if (!$this->useYield) {while (ob_get_level() > $level) {ob_end_clean();}}}}/*** @return iterable<string>*/public function yieldBlock($name, array $context, array $blocks = [], $useBlocks = true, ?self $templateContext = null){if ($useBlocks && isset($blocks[$name])) {$template = $blocks[$name][0];$block = $blocks[$name][1];} elseif (isset($this->blocks[$name])) {$template = $this->blocks[$name][0];$block = $this->blocks[$name][1];} else {$template = null;$block = null;}// avoid RCEs when sandbox is enabledif (null !== $template && !$template instanceof self) {throw new \LogicException('A block must be a method on a \Twig\Template instance.');}if (null !== $template) {try {if ($this->useYield) {yield from $template->$block($context, $blocks);return;}$level = ob_get_level();ob_start();foreach ($template->$block($context, $blocks) as $data) {if (ob_get_length()) {$data = ob_get_clean().$data;ob_start();}yield $data;}if (ob_get_length()) {yield ob_get_clean();}} catch (Error $e) {if (!$e->getSourceContext()) {$e->setSourceContext($template->getSourceContext());}// this is mostly useful for \Twig\Error\LoaderError exceptions// see \Twig\Error\LoaderErrorif (-1 === $e->getTemplateLine()) {$e->guess();}throw $e;} catch (\Throwable $e) {$e = new RuntimeError(\sprintf('An exception has been thrown during the rendering of a template ("%s").', $e->getMessage()), -1, $template->getSourceContext(), $e);$e->guess();throw $e;} finally {if (!$this->useYield) {while (ob_get_level() > $level) {ob_end_clean();}}}} elseif ($parent = $this->getParent($context)) {yield from $parent->unwrap()->yieldBlock($name, $context, array_merge($this->blocks, $blocks), false, $templateContext ?? $this);} elseif (isset($blocks[$name])) {throw new RuntimeError(\sprintf('Block "%s" should not call parent() in "%s" as the block does not exist in the parent template "%s".', $name, $blocks[$name][0]->getTemplateName(), $this->getTemplateName()), -1, $blocks[$name][0]->getSourceContext());} else {throw new RuntimeError(\sprintf('Block "%s" on template "%s" does not exist.', $name, $this->getTemplateName()), -1, ($templateContext ?? $this)->getSourceContext());}}/*** Yields a parent block.** This method is for internal use only and should never be called* directly.** @param string $name The block name to display from the parent* @param array $context The context* @param array $blocks The current set of blocks** @return iterable<string>*/public function yieldParentBlock($name, array $context, array $blocks = []){if (isset($this->traits[$name])) {yield from $this->traits[$name][0]->yieldBlock($name, $context, $blocks, false);} elseif ($parent = $this->getParent($context)) {yield from $parent->unwrap()->yieldBlock($name, $context, $blocks, false);} else {throw new RuntimeError(\sprintf('The template has no parent and no traits defining the "%s" block.', $name), -1, $this->getSourceContext());}}/*** Auto-generated method to display the template with the given context.** @param array $context An array of parameters to pass to the template* @param array $blocks An array of blocks to pass to the template*/abstract protected function doDisplay(array $context, array $blocks = []);}