<?php
/*
* This file is part of Twig.
*
* (c) Fabien Potencier
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Stores the Twig configuration.
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class Twig_Environment
{
const VERSION = '2.3.2';
const VERSION_ID = 20302;
const MAJOR_VERSION = 2;
const MINOR_VERSION = 3;
const RELEASE_VERSION = 2;
const EXTRA_VERSION = '';
private $charset;
private $loader;
private $debug;
private $autoReload;
private $cache;
private $lexer;
private $parser;
private $compiler;
private $baseTemplateClass;
private $globals = array();
private $resolvedGlobals;
private $loadedTemplates;
private $strictVariables;
private $templateClassPrefix = '__TwigTemplate_';
private $originalCache;
private $extensionSet;
private $runtimeLoaders = array();
private $runtimes = array();
private $optionsHash;
/**
* Constructor.
*
* Available options:
*
* * debug: When set to true, it automatically set "auto_reload" to true as
* well (default to false).
*
* * charset: The charset used by the templates (default to UTF-8).
*
* * base_template_class: The base template class to use for generated
* templates (default to Twig_Template).
*
* * cache: An absolute path where to store the compiled templates,
* a Twig_Cache_Interface implementation,
* or false to disable compilation cache (default).
*
* * auto_reload: Whether to reload the template if the original source changed.
* If you don't provide the auto_reload option, it will be
* determined automatically based on the debug value.
*
* * strict_variables: Whether to ignore invalid variables in templates
* (default to false).
*
* * autoescape: Whether to enable auto-escaping (default to html):
* * false: disable auto-escaping
* * html, js: set the autoescaping to one of the supported strategies
* * name: set the autoescaping strategy based on the template name extension
* * PHP callback: a PHP callback that returns an escaping strategy based on the template "name"
*
* * optimizations: A flag that indicates which optimizations to apply
* (default to -1 which means that all optimizations are enabled;
* set it to 0 to disable).
*
* @param Twig_LoaderInterface $loader
* @param array $options An array of options
*/
public function __construct(Twig_LoaderInterface $loader, $options = array())
{
$this->setLoader($loader);
$options = array_merge(array(
'debug' => false,
'charset' => 'UTF-8',
'base_template_class' => 'Twig_Template',
'strict_variables' => false,
'autoescape' => 'html',
'cache' => false,
'auto_reload' => null,
'optimizations' => -1,
), $options);
$this->debug = (bool) $options['debug'];
$this->setCharset($options['charset']);
$this->baseTemplateClass = $options['base_template_class'];
$this->autoReload = null === $options['auto_reload'] ? $this->debug : (bool) $options['auto_reload'];
$this->strictVariables = (bool) $options['strict_variables'];
$this->setCache($options['cache']);
$this->extensionSet = new Twig_ExtensionSet();
$this->addExtension(new Twig_Extension_Core());
$this->addExtension(new Twig_Extension_Escaper($options['autoescape']));
$this->addExtension(new Twig_Extension_Optimizer($options['optimizations']));
}
/**
* Gets the base template class for compiled templates.
*
* @return string The base template class name
*/
public function getBaseTemplateClass()
{
return $this->baseTemplateClass;
}
/**
* Sets the base template class for compiled templates.
*
* @param string $class The base template class name
*/
public function setBaseTemplateClass($class)
{
$this->baseTemplateClass = $class;
$this->updateOptionsHash();
}
/**
* Enables debugging mode.
*/
public function enableDebug()
{
$this->debug = true;
$this->updateOptionsHash();
}
/**
* Disables debugging mode.
*/
public function disableDebug()
{
$this->debug = false;
$this->updateOptionsHash();
}
/**
* Checks if debug mode is enabled.
*
* @return bool true if debug mode is enabled, false otherwise
*/
public function isDebug()
{
return $this->debug;
}
/**
* Enables the auto_reload option.
*/
public function enableAutoReload()
{
$this->autoReload = true;
}
/**
* Disables the auto_reload option.
*/
public function disableAutoReload()
{
$this->autoReload = false;
}
/**
* Checks if the auto_reload option is enabled.
*
* @return bool true if auto_reload is enabled, false otherwise
*/
public function isAutoReload()
{
return $this->autoReload;
}
/**
* Enables the strict_variables option.
*/
public function enableStrictVariables()
{
$this->strictVariables = true;
$this->updateOptionsHash();
}
/**
* Disables the strict_variables option.
*/
public function disableStrictVariables()
{
$this->strictVariables = false;
$this->updateOptionsHash();
}
/**
* Checks if the strict_variables option is enabled.
*
* @return bool true if strict_variables is enabled, false otherwise
*/
public function isStrictVariables()
{
return $this->strictVariables;
}
/**
* Gets the current cache implementation.
*
* @param bool $original Whether to return the original cache option or the real cache instance
*
* @return Twig_CacheInterface|string|false A Twig_CacheInterface implementation,
* an absolute path to the compiled templates,
* or false to disable cache
*/
public function getCache($original = true)
{
return $original ? $this->originalCache : $this->cache;
}
/**
* Sets the current cache implementation.
*
* @param Twig_CacheInterface|string|false $cache A Twig_CacheInterface implementation,
* an absolute path to the compiled templates,
* or false to disable cache
*/
public function setCache($cache)
{
if (is_string($cache)) {
$this->originalCache = $cache;
$this->cache = new Twig_Cache_Filesystem($cache);
} elseif (false === $cache) {
$this->originalCache = $cache;
$this->cache = new Twig_Cache_Null();
} elseif ($cache instanceof Twig_CacheInterface) {
$this->originalCache = $this->cache = $cache;
} else {
throw new LogicException(sprintf('Cache can only be a string, false, or a Twig_CacheInterface implementation.'));
}
}
/**
* Gets the template class associated with the given string.
*
* The generated template class is based on the following parameters:
*
* * The cache key for the given template;
* * The currently enabled extensions;
* * Whether the Twig C extension is available or not;
* * PHP version;
* * Twig version;
* * Options with what environment was created.
*
* @param string $name The name for which to calculate the template class name
* @param int|null $index The index if it is an embedded template
*
* @return string The template class name
*/
public function getTemplateClass($name, $index = null)
{
$key = $this->getLoader()->getCacheKey($name).$this->optionsHash;
return $this->templateClassPrefix.hash('sha256', $key).(null === $index ? '' : '_'.$index);
}
/**
* Renders a template.
*
* @param string $name The template name
* @param array $context An array of parameters to pass to the template
*
* @return string The rendered template
*
* @throws Twig_Error_Loader When the template cannot be found
* @throws Twig_Error_Syntax When an error occurred during compilation
* @throws Twig_Error_Runtime When an error occurred during rendering
*/
public function render($name, array $context = array())
{
return $this->loadTemplate($name)->render($context);
}
/**
* Displays a template.
*
* @param string $name The template name
* @param array $context An array of parameters to pass to the template
*
* @throws Twig_Error_Loader When the template cannot be found
* @throws Twig_Error_Syntax When an error occurred during compilation
* @throws Twig_Error_Runtime When an error occurred during rendering
*/
public function display($name, array $context = array())
{
$this->loadTemplate($name)->display($context);
}
/**
* Loads a template.
*
* @param string|Twig_TemplateWrapper|Twig_Template $name The template name
*
* @return Twig_TemplateWrapper
*/
public function load($name)
{
if ($name instanceof Twig_TemplateWrapper) {
return $name;
}
if ($name instanceof Twig_Template) {
return new Twig_TemplateWrapper($this, $name);
}
return new Twig_TemplateWrapper($this, $this->loadTemplate($name));
}
/**
* Loads a template internal representation.
*
* This method is for internal use only and should never be called
* directly.
*
* @param string $name The template name
* @param int $index The index if it is an embedded template
*
* @return Twig_Template A template instance representing the given template name
*
* @throws Twig_Error_Loader When the template cannot be found
* @throws Twig_Error_Runtime When a previously generated cache is corrupted
* @throws Twig_Error_Syntax When an error occurred during compilation
*
* @internal
*/
public function loadTemplate($name, $index = null)
{
$cls = $mainCls = $this->getTemplateClass($name);
if (null !== $index) {
$cls .= '_'.$index;
}
if (isset($this->loadedTemplates[$cls])) {
return $this->loadedTemplates[$cls];
}
if (!class_exists($cls, false)) {
$key = $this->cache->generateKey($name, $mainCls);
if (!$this->isAutoReload() || $this->isTemplateFresh($name, $this->cache->getTimestamp($key))) {
$this->cache->load($key);
}
if (!class_exists($cls, false)) {
$source = $this->getLoader()->getSourceContext($name);
$content = $this->compileSource($source);
$this->cache->write($key, $content);
$this->cache->load($key);
if (!class_exists($mainCls, false)) {
/* Last line of defense if either $this->bcWriteCacheFile was used,
* $this->cache is implemented as a no-op or we have a race condition
* where the cache was cleared between the above calls to write to and load from
* the cache.
*/
eval('?>'.$content);
}
if (!class_exists($cls, false)) {
throw new Twig_Error_Runtime(sprintf('Failed to load Twig template "%s", index "%s": cache is corrupted.', $name, $index), -1, $source);
}
}
}
// to be removed in 3.0
$this->extensionSet->initRuntime($this);
return $this->loadedTemplates[$cls] = new $cls($this);
}
/**
* Creates a template from source.
*
* This method should not be used as a generic way to load templates.
*
* @param string $template The template name
*
* @return Twig_Template A template instance representing the given template name
*
* @throws Twig_Error_Loader When the template cannot be found
* @throws Twig_Error_Syntax When an error occurred during compilation
*/
public function createTemplate($template)
{
$name = sprintf('__string_template__%s', hash('sha256', uniqid(mt_rand(), true), false));
$loader = new Twig_Loader_Chain(array(
new Twig_Loader_Array(array($name => $template)),
$current = $this->getLoader(),
));
$this->setLoader($loader);
try {
$template = $this->loadTemplate($name);
} finally {
$this->setLoader($current);
}
return $template;
}
/**
* Returns true if the template is still fresh.
*
* Besides checking the loader for freshness information,
* this method also checks if the enabled extensions have
* not changed.
*
* @param string $name The template name
* @param int $time The last modification time of the cached template
*
* @return bool true if the template is fresh, false otherwise
*/
public function isTemplateFresh($name, $time)
{
return $this->extensionSet->getLastModified() <= $time && $this->getLoader()->isFresh($name, $time);
}
/**
* Tries to load a template consecutively from an array.
*
* Similar to loadTemplate() but it also accepts Twig_Template instances and an array
* of templates where each is tried to be loaded.
*
* @param string|Twig_Template|array $names A template or an array of templates to try consecutively
*
* @return Twig_Template
*
* @throws Twig_Error_Loader When none of the templates can be found
* @throws Twig_Error_Syntax When an error occurred during compilation
*/
public function resolveTemplate($names)
{
if (!is_array($names)) {
$names = array($names);
}
foreach ($names as $name) {
if ($name instanceof Twig_Template) {
return $name;
}
try {
return $this->loadTemplate($name);
} catch (Twig_Error_Loader $e) {
}
}
if (1 === count($names)) {
throw $e;
}
throw new Twig_Error_Loader(sprintf('Unable to find one of the following templates: "%s".', implode('", "', $names)));
}
public function setLexer(Twig_Lexer $lexer)
{
$this->lexer = $lexer;
}
/**
* Tokenizes a source code.
*
* @return Twig_TokenStream
*
* @throws Twig_Error_Syntax When the code is syntactically wrong
*/
public function tokenize(Twig_Source $source)
{
if (null === $this->lexer) {
$this->lexer = new Twig_Lexer($this);
}
return $this->lexer->tokenize($source);
}
public function setParser(Twig_Parser $parser)
{
$this->parser = $parser;
}
/**
* Converts a token stream to a node tree.
*
* @return Twig_Node_Module
*
* @throws Twig_Error_Syntax When the token stream is syntactically or semantically wrong
*/
public function parse(Twig_TokenStream $stream)
{
if (null === $this->parser) {
$this->parser = new Twig_Parser($this);
}
return $this->parser->parse($stream);
}
public function setCompiler(Twig_Compiler $compiler)
{
$this->compiler = $compiler;
}
/**
* Compiles a node and returns the PHP code.
*
* @return string The compiled PHP source code
*/
public function compile(Twig_Node $node)
{
if (null === $this->compiler) {
$this->compiler = new Twig_Compiler($this);
}
return $this->compiler->compile($node)->getSource();
}
/**
* Compiles a template source code.
*
* @return string The compiled PHP source code
*
* @throws Twig_Error_Syntax When there was an error during tokenizing, parsing or compiling
*/
public function compileSource(Twig_Source $source)
{
try {
return $this->compile($this->parse($this->tokenize($source)));
} catch (Twig_Error $e) {
$e->setSourceContext($source);
throw $e;
} catch (Exception $e) {
throw new Twig_Error_Syntax(sprintf('An exception has been thrown during the compilation of a template ("%s").', $e->getMessage()), -1, $source, $e);
}
}
public function setLoader(Twig_LoaderInterface $loader)
{
$this->loader = $loader;
}
/**
* Gets the Loader instance.
*
* @return Twig_LoaderInterface
*/
public function getLoader()
{
return $this->loader;
}
/**
* Sets the default template charset.
*
* @param string $charset The default charset
*/
public function setCharset($charset)
{
if ('UTF8' === $charset = strtoupper($charset)) {
// iconv on Windows requires "UTF-8" instead of "UTF8"
$charset = 'UTF-8';
}
$this->charset = $charset;
}
/**
* Gets the default template charset.
*
* @return string The default charset
*/
public function getCharset()
{
return $this->charset;
}
/**
* Returns true if the given extension is registered.
*
* @param string $class The extension class name
*
* @return bool Whether the extension is registered or not
*/
public function hasExtension($class)
{
return $this->extensionSet->hasExtension($class);
}
/**
* Adds a runtime loader.
*/
public function addRuntimeLoader(Twig_RuntimeLoaderInterface $loader)
{
$this->runtimeLoaders[] = $loader;
}
/**
* Gets an extension by class name.
*
* @param string $class The extension class name
*
* @return Twig_ExtensionInterface
*/
public function getExtension($class)
{
return $this->extensionSet->getExtension($class);
}
/**
* Returns the runtime implementation of a Twig element (filter/function/test).
*
* @param string $class A runtime class name
*
* @return object The runtime implementation
*
* @throws Twig_Error_Runtime When the template cannot be found
*/
public function getRuntime($class)
{
if (isset($this->runtimes[$class])) {
return $this->runtimes[$class];
}
foreach ($this->runtimeLoaders as $loader) {
if (null !== $runtime = $loader->load($class)) {
return $this->runtimes[$class] = $runtime;
}
}
throw new Twig_Error_Runtime(sprintf('Unable to load the "%s" runtime.', $class));
}
public function addExtension(Twig_ExtensionInterface $extension)
{
$this->extensionSet->addExtension($extension);
$this->updateOptionsHash();
}
/**
* Registers an array of extensions.
*
* @param array $extensions An array of extensions
*/
public function setExtensions(array $extensions)
{
$this->extensionSet->setExtensions($extensions);
}
/**
* Returns all registered extensions.
*
* @return Twig_ExtensionInterface[] An array of extensions (keys are for internal usage only and should not be relied on)
*/
public function getExtensions()
{
return $this->extensionSet->getExtensions();
}
public function addTokenParser(Twig_TokenParserInterface $parser)
{
$this->extensionSet->addTokenParser($parser);
}
/**
* Gets the registered Token Parsers.
*
* @return Twig_TokenParserInterface[]
*
* @internal
*/
public function getTokenParsers()
{
return $this->extensionSet->getTokenParsers();
}
/**
* Gets registered tags.
*
* @return Twig_TokenParserInterface[]
*
* @internal
*/
public function getTags()
{
$tags = array();
foreach ($this->getTokenParsers() as $parser) {
$tags[$parser->getTag()] = $parser;
}
return $tags;
}
public function addNodeVisitor(Twig_NodeVisitorInterface $visitor)
{
$this->extensionSet->addNodeVisitor($visitor);
}
/**
* Gets the registered Node Visitors.
*
* @return Twig_NodeVisitorInterface[]
*
* @internal
*/
public function getNodeVisitors()
{
return $this->extensionSet->getNodeVisitors();
}
public function addFilter(Twig_Filter $filter)
{
$this->extensionSet->addFilter($filter);
}
/**
* Get a filter by name.
*
* Subclasses may override this method and load filters differently;
* so no list of filters is available.
*
* @param string $name The filter name
*
* @return Twig_Filter|false A Twig_Filter instance or false if the filter does not exist
*
* @internal
*/
public function getFilter($name)
{
return $this->extensionSet->getFilter($name);
}
public function registerUndefinedFilterCallback(callable $callable)
{
$this->extensionSet->registerUndefinedFilterCallback($callable);
}
/**
* Gets the registered Filters.
*
* Be warned that this method cannot return filters defined with registerUndefinedFilterCallback.
*
* @return Twig_Filter[]
*
* @see registerUndefinedFilterCallback
*
* @internal
*/
public function getFilters()
{
return $this->extensionSet->getFilters();
}
/**
* Registers a Test.
*
* @param Twig_Test $test A Twig_Test instance
*/
public function addTest(Twig_Test $test)
{
$this->extensionSet->addTest($test);
}
/**
* Gets the registered Tests.
*
* @return Twig_Test[]
*
* @internal
*/
public function getTests()
{
return $this->extensionSet->getTests();
}
/**
* Gets a test by name.
*
* @param string $name The test name
*
* @return Twig_Test|false A Twig_Test instance or false if the test does not exist
*
* @internal
*/
public function getTest($name)
{
return $this->extensionSet->getTest($name);
}
public function addFunction(Twig_Function $function)
{
$this->extensionSet->addFunction($function);
}
/**
* Get a function by name.
*
* Subclasses may override this method and load functions differently;
* so no list of functions is available.
*
* @param string $name function name
*
* @return Twig_Function|false A Twig_Function instance or false if the function does not exist
*
* @internal
*/
public function getFunction($name)
{
return $this->extensionSet->getFunction($name);
}
public function registerUndefinedFunctionCallback(callable $callable)
{
$this->extensionSet->registerUndefinedFunctionCallback($callable);
}
/**
* Gets registered functions.
*
* Be warned that this method cannot return functions defined with registerUndefinedFunctionCallback.
*
* @return Twig_Function[]
*
* @see registerUndefinedFunctionCallback
*
* @internal
*/
public function getFunctions()
{
return $this->extensionSet->getFunctions();
}
/**
* Registers a Global.
*
* New globals can be added before compiling or rendering a template;
* but after, you can only update existing globals.
*
* @param string $name The global name
* @param mixed $value The global value
*/
public function addGlobal($name, $value)
{
if ($this->extensionSet->isInitialized() && !array_key_exists($name, $this->getGlobals())) {
throw new LogicException(sprintf('Unable to add global "%s" as the runtime or the extensions have already been initialized.', $name));
}
if (null !== $this->resolvedGlobals) {
$this->resolvedGlobals[$name] = $value;
} else {
$this->globals[$name] = $value;
}
}
/**
* Gets the registered Globals.
*
* @return array An array of globals
*
* @internal
*/
public function getGlobals()
{
if ($this->extensionSet->isInitialized()) {
if (null === $this->resolvedGlobals) {
$this->resolvedGlobals = array_merge($this->extensionSet->getGlobals(), $this->globals);
}
return $this->resolvedGlobals;
}
return array_merge($this->extensionSet->getGlobals(), $this->globals);
}
/**
* Merges a context with the defined globals.
*
* @param array $context An array representing the context
*
* @return array The context merged with the globals
*/
public function mergeGlobals(array $context)
{
// we don't use array_merge as the context being generally
// bigger than globals, this code is faster.
foreach ($this->getGlobals() as $key => $value) {
if (!array_key_exists($key, $context)) {
$context[$key] = $value;
}
}
return $context;
}
/**
* Gets the registered unary Operators.
*
* @return array An array of unary operators
*
* @internal
*/
public function getUnaryOperators()
{
return $this->extensionSet->getUnaryOperators();
}
/**
* Gets the registered binary Operators.
*
* @return array An array of binary operators
*
* @internal
*/
public function getBinaryOperators()
{
return $this->extensionSet->getBinaryOperators();
}
private function updateOptionsHash()
{
$this->optionsHash = implode(':', array(
$this->extensionSet->getSignature(),
PHP_MAJOR_VERSION,
PHP_MINOR_VERSION,
self::VERSION,
(int) $this->debug,
$this->baseTemplateClass,
(int) $this->strictVariables,
));
}
}
