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<?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 implements \Twig_TemplateInterface
{
/**
* @internal
*/
protected static $cache = [];
protected $parent;
protected $parents = [];
protected $env;
protected $blocks = [];
protected $traits = [];
protected $sandbox;
public function __construct(Environment $env)
{
$this->env = $env;
}
/**
* @internal this method will be removed in 2.0 and is only used internally to provide an upgrade path from 1.x to 2.0
*/
public function __toString()
{
return $this->getTemplateName();
}
/**
* Returns the template name.
*
* @return string The template name
*/
abstract public function getTemplateName();
/**
* Returns debug information about the template.
*
* @return array Debug information
*/
public function getDebugInfo()
{
return [];
}
/**
* Returns the template source code.
*
* @return string The template source code
*
* @deprecated since 1.27 (to be removed in 2.0). Use getSourceContext() instead
*/
public function getSource()
{
@trigger_error('The '.__METHOD__.' method is deprecated since version 1.27 and will be removed in 2.0. Use getSourceContext() instead.', E_USER_DEPRECATED);
return '';
}
/**
* Returns information about the original template source code.
*
* @return Source
*/
public function getSourceContext()
{
return new Source('', $this->getTemplateName());
}
/**
* @deprecated since 1.20 (to be removed in 2.0)
*/
public function getEnvironment()
{
@trigger_error('The '.__METHOD__.' method is deprecated since version 1.20 and will be removed in 2.0.', E_USER_DEPRECATED);
return $this->env;
}
/**
* Returns the parent template.
*
* This method is for internal use only and should never be called
* directly.
*
* @param array $context
*
* @return \Twig_TemplateInterface|TemplateWrapper|false The parent template or false if there is no parent
*
* @internal
*/
public function getParent(array $context)
{
if (null !== $this->parent) {
return $this->parent;
}
try {
$parent = $this->doGetParent($context);
if (false === $parent) {
return false;
}
if ($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 = [])
{
$name = (string) $name;
if (isset($this->traits[$name])) {
$this->traits[$name][0]->displayBlock($name, $context, $blocks, false);
} elseif (false !== $parent = $this->getParent($context)) {
$parent->displayBlock($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());
}
}
/**
* 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)
{
$name = (string) $name;
if ($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 enabled
if (null !== $template && !$template instanceof self) {
throw new \LogicException('A block must be a method on a \Twig\Template instance.');
}
if (null !== $template) {
try {
$template->$block($context, $blocks);
} catch (Error $e) {
if (!$e->getSourceContext()) {
$e->setSourceContext($template->getSourceContext());
}
// this is mostly useful for \Twig\Error\LoaderError exceptions
// see \Twig\Error\LoaderError
if (-1 === $e->getTemplateLine()) {
$e->guess();
}
throw $e;
} catch (\Exception $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;
}
} elseif (false !== $parent = $this->getParent($context)) {
$parent->displayBlock($name, $context, array_merge($this->blocks, $blocks), false);
} else {
@trigger_error(sprintf('Silent display of undefined block "%s" in template "%s" is deprecated since version 1.29 and will throw an exception in 2.0. Use the "block(\'%s\') is defined" expression to test for block existence.', $name, $this->getTemplateName(), $name), E_USER_DEPRECATED);
}
}
/**
* 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 $blocks = [])
{
if ($this->env->isDebug()) {
ob_start();
} else {
ob_start(function () { return ''; });
}
$this->displayParentBlock($name, $context, $blocks);
return ob_get_clean();
}
/**
* 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 = [], $useBlocks = true)
{
if ($this->env->isDebug()) {
ob_start();
} else {
ob_start(function () { return ''; });
}
$this->displayBlock($name, $context, $blocks, $useBlocks);
return ob_get_clean();
}
/**
* 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 = null, array $blocks = [])
{
if (null === $context) {
@trigger_error('The '.__METHOD__.' method is internal and should never be called; calling it directly is deprecated since version 1.28 and won\'t be possible anymore in 2.0.', E_USER_DEPRECATED);
return isset($this->blocks[(string) $name]);
}
if (isset($blocks[$name])) {
return $blocks[$name][0] instanceof self;
}
if (isset($this->blocks[$name])) {
return true;
}
if (false !== $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 = null, array $blocks = [])
{
if (null === $context) {
@trigger_error('The '.__METHOD__.' method is internal and should never be called; calling it directly is deprecated since version 1.28 and won\'t be possible anymore in 2.0.', E_USER_DEPRECATED);
return array_keys($this->blocks);
}
$names = array_merge(array_keys($blocks), array_keys($this->blocks));
if (false !== $parent = $this->getParent($context)) {
$names = array_merge($names, $parent->getBlockNames($context));
}
return array_unique($names);
}
/**
* @return Template|TemplateWrapper
*/
protected function loadTemplate($template, $templateName = null, $line = null, $index = null)
{
try {
if (\is_array($template)) {
return $this->env->resolveTemplate($template);
}
if ($template instanceof self || $template instanceof TemplateWrapper) {
return $template;
}
if ($template === $this->getTemplateName()) {
$class = \get_class($this);
if (false !== $pos = strrpos($class, '___', -1)) {
$class = substr($class, 0, $pos);
}
return $this->env->loadClass($class, $template, $index);
}
return $this->env->loadTemplate($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 Template
*/
protected 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 = [])
{
$this->displayWithErrorHandling($this->env->mergeGlobals($context), array_merge($this->blocks, $blocks));
}
public function render(array $context)
{
$level = ob_get_level();
if ($this->env->isDebug()) {
ob_start();
} else {
ob_start(function () { return ''; });
}
try {
$this->display($context);
} catch (\Exception $e) {
while (ob_get_level() > $level) {
ob_end_clean();
}
throw $e;
} catch (\Throwable $e) {
while (ob_get_level() > $level) {
ob_end_clean();
}
throw $e;
}
return ob_get_clean();
}
protected function displayWithErrorHandling(array $context, array $blocks = [])
{
try {
$this->doDisplay($context, $blocks);
} catch (Error $e) {
if (!$e->getSourceContext()) {
$e->setSourceContext($this->getSourceContext());
}
// this is mostly useful for \Twig\Error\LoaderError exceptions
// see \Twig\Error\LoaderError
if (-1 === $e->getTemplateLine()) {
$e->guess();
}
throw $e;
} catch (\Exception $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;
}
}
/**
* 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 = []);
/**
* Returns a variable from the context.
*
* This method is for internal use only and should never be called
* directly.
*
* This method should not be overridden in a sub-class as this is an
* implementation detail that has been introduced to optimize variable
* access for versions of PHP before 5.4. This is not a way to override
* the way to get a variable value.
*
* @param array $context The context
* @param string $item The variable to return from the context
* @param bool $ignoreStrictCheck Whether to ignore the strict variable check or not
*
* @return mixed The content of the context variable
*
* @throws RuntimeError if the variable does not exist and Twig is running in strict mode
*
* @internal
*/
final protected function getContext($context, $item, $ignoreStrictCheck = false)
{
if (!\array_key_exists($item, $context)) {
if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
return;
}
throw new RuntimeError(sprintf('Variable "%s" does not exist.', $item), -1, $this->getSourceContext());
}
return $context[$item];
}
/**
* Returns the attribute value for a given array/object.
*
* @param mixed $object The object or array from where to get the item
* @param mixed $item The item to get from the array or object
* @param array $arguments An array of arguments to pass if the item is an object method
* @param string $type The type of attribute (@see \Twig\Template constants)
* @param bool $isDefinedTest Whether this is only a defined check
* @param bool $ignoreStrictCheck Whether to ignore the strict attribute check or not
*
* @return mixed The attribute value, or a Boolean when $isDefinedTest is true, or null when the attribute is not set and $ignoreStrictCheck is true
*
* @throws RuntimeError if the attribute does not exist and Twig is running in strict mode and $isDefinedTest is false
*
* @internal
*/
protected function getAttribute($object, $item, array $arguments = [], $type = self::ANY_CALL, $isDefinedTest = false, $ignoreStrictCheck = false)
{
// array
if (self::METHOD_CALL !== $type) {
$arrayItem = \is_bool($item) || \is_float($item) ? (int) $item : $item;
if (((\is_array($object) || $object instanceof \ArrayObject) && (isset($object[$arrayItem]) || \array_key_exists($arrayItem, (array) $object)))
|| ($object instanceof \ArrayAccess && isset($object[$arrayItem]))
) {
if ($isDefinedTest) {
return true;
}
return $object[$arrayItem];
}
if (self::ARRAY_CALL === $type || !\is_object($object)) {
if ($isDefinedTest) {
return false;
}
if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
return;
}
if ($object instanceof \ArrayAccess) {
$message = sprintf('Key "%s" in object with ArrayAccess of class "%s" does not exist.', $arrayItem, \get_class($object));
} elseif (\is_object($object)) {
$message = sprintf('Impossible to access a key "%s" on an object of class "%s" that does not implement ArrayAccess interface.', $item, \get_class($object));
} elseif (\is_array($object)) {
if (empty($object)) {
$message = sprintf('Key "%s" does not exist as the array is empty.', $arrayItem);
} else {
$message = sprintf('Key "%s" for array with keys "%s" does not exist.', $arrayItem, implode(', ', array_keys($object)));
}
} elseif (self::ARRAY_CALL === $type) {
if (null === $object) {
$message = sprintf('Impossible to access a key ("%s") on a null variable.', $item);
} else {
$message = sprintf('Impossible to access a key ("%s") on a %s variable ("%s").', $item, \gettype($object), $object);
}
} elseif (null === $object) {
$message = sprintf('Impossible to access an attribute ("%s") on a null variable.', $item);
} else {
$message = sprintf('Impossible to access an attribute ("%s") on a %s variable ("%s").', $item, \gettype($object), $object);
}
throw new RuntimeError($message, -1, $this->getSourceContext());
}
}
if (!\is_object($object)) {
if ($isDefinedTest) {
return false;
}
if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
return;
}
if (null === $object) {
$message = sprintf('Impossible to invoke a method ("%s") on a null variable.', $item);
} elseif (\is_array($object)) {
$message = sprintf('Impossible to invoke a method ("%s") on an array.', $item);
} else {
$message = sprintf('Impossible to invoke a method ("%s") on a %s variable ("%s").', $item, \gettype($object), $object);
}
throw new RuntimeError($message, -1, $this->getSourceContext());
}
// object property
if (self::METHOD_CALL !== $type && !$object instanceof self) { // \Twig\Template does not have public properties, and we don't want to allow access to internal ones
if (isset($object->$item) || \array_key_exists((string) $item, (array) $object)) {
if ($isDefinedTest) {
return true;
}
if ($this->env->hasExtension('\Twig\Extension\SandboxExtension')) {
$this->env->getExtension('\Twig\Extension\SandboxExtension')->checkPropertyAllowed($object, $item);
}
return $object->$item;
}
}
$class = \get_class($object);
// object method
if (!isset(self::$cache[$class])) {
// get_class_methods returns all methods accessible in the scope, but we only want public ones to be accessible in templates
if ($object instanceof self) {
$ref = new \ReflectionClass($class);
$methods = [];
foreach ($ref->getMethods(\ReflectionMethod::IS_PUBLIC) as $refMethod) {
// Accessing the environment from templates is forbidden to prevent untrusted changes to the environment
if ('getenvironment' !== strtr($refMethod->name, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz')) {
$methods[] = $refMethod->name;
}
}
} else {
$methods = get_class_methods($object);
}
// sort values to have consistent behavior, so that "get" methods win precedence over "is" methods
sort($methods);
$cache = [];
foreach ($methods as $method) {
$cache[$method] = $method;
$cache[$lcName = strtr($method, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz')] = $method;
if ('g' === $lcName[0] && 0 === strpos($lcName, 'get')) {
$name = substr($method, 3);
$lcName = substr($lcName, 3);
} elseif ('i' === $lcName[0] && 0 === strpos($lcName, 'is')) {
$name = substr($method, 2);
$lcName = substr($lcName, 2);
} else {
continue;
}
// skip get() and is() methods (in which case, $name is empty)
if ($name) {
if (!isset($cache[$name])) {
$cache[$name] = $method;
}
if (!isset($cache[$lcName])) {
$cache[$lcName] = $method;
}
}
}
self::$cache[$class] = $cache;
}
$call = false;
if (isset(self::$cache[$class][$item])) {
$method = self::$cache[$class][$item];
} elseif (isset(self::$cache[$class][$lcItem = strtr($item, 'ABCDEFGHIJKLMNOPQRSTUVWXYZ', 'abcdefghijklmnopqrstuvwxyz')])) {
$method = self::$cache[$class][$lcItem];
} elseif (isset(self::$cache[$class]['__call'])) {
$method = $item;
$call = true;
} else {
if ($isDefinedTest) {
return false;
}
if ($ignoreStrictCheck || !$this->env->isStrictVariables()) {
return;
}
throw new RuntimeError(sprintf('Neither the property "%1$s" nor one of the methods "%1$s()", "get%1$s()"/"is%1$s()" or "__call()" exist and have public access in class "%2$s".', $item, $class), -1, $this->getSourceContext());
}
if ($isDefinedTest) {
return true;
}
if ($this->env->hasExtension('\Twig\Extension\SandboxExtension')) {
$this->env->getExtension('\Twig\Extension\SandboxExtension')->checkMethodAllowed($object, $method);
}
// Some objects throw exceptions when they have __call, and the method we try
// to call is not supported. If ignoreStrictCheck is true, we should return null.
try {
if (!$arguments) {
$ret = $object->$method();
} else {
$ret = \call_user_func_array([$object, $method], $arguments);
}
} catch (\BadMethodCallException $e) {
if ($call && ($ignoreStrictCheck || !$this->env->isStrictVariables())) {
return;
}
throw $e;
}
// @deprecated in 1.28
if ($object instanceof \Twig_TemplateInterface) {
$self = $object->getTemplateName() === $this->getTemplateName();
$message = sprintf('Calling "%s" on template "%s" from template "%s" is deprecated since version 1.28 and won\'t be supported anymore in 2.0.', $item, $object->getTemplateName(), $this->getTemplateName());
if ('renderBlock' === $method || 'displayBlock' === $method) {
$message .= sprintf(' Use block("%s"%s) instead).', $arguments[0], $self ? '' : ', template');
} elseif ('hasBlock' === $method) {
$message .= sprintf(' Use "block("%s"%s) is defined" instead).', $arguments[0], $self ? '' : ', template');
} elseif ('render' === $method || 'display' === $method) {
$message .= sprintf(' Use include("%s") instead).', $object->getTemplateName());
}
@trigger_error($message, E_USER_DEPRECATED);
return '' === $ret ? '' : new Markup($ret, $this->env->getCharset());
}
return $ret;
}
}
class_alias('Twig\Template', 'Twig_Template');
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| Util | |||||
| Compiler.php | |||||
| Environment.php | |||||
| ExpressionParser.php | |||||
| FileExtensionEscapingStrategy.php | |||||
| Lexer.php | |||||
| Markup.php | |||||
| NodeTraverser.php | |||||
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| Source.php | |||||
| Template.php | |||||
| TemplateWrapper.php | |||||
| Token.php | |||||
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| TwigFunction.php | |||||
| TwigTest.php |