How to call a function in a Twig file

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Let's say I create a function in a module file:

function _get_test() 
 return 'test';

How can I call this in any Twig file? For example *.html.twig, page.html.twig, node.html.twig etc.

How can I pass a variable from PHP to Twig and display in any Twig file.
For example *.html.twig, page.html.twig, node.html.twig etc.

edited 12 mins ago

asked 48 mins ago

Rituraj Kumar

8412

add a commentÂ |Â

up vote
1
down vote

favorite

Let's say I create a function in a module file:

function _get_test() 
 return 'test';

How can I call this in any Twig file? For example *.html.twig, page.html.twig, node.html.twig etc.

How can I pass a variable from PHP to Twig and display in any Twig file.
For example *.html.twig, page.html.twig, node.html.twig etc.

edited 12 mins ago

asked 48 mins ago

Rituraj Kumar

8412

add a commentÂ |Â

up vote
1
down vote

favorite

Let's say I create a function in a module file:

function _get_test() 
 return 'test';

How can I call this in any Twig file? For example *.html.twig, page.html.twig, node.html.twig etc.

How can I pass a variable from PHP to Twig and display in any Twig file.
For example *.html.twig, page.html.twig, node.html.twig etc.

edited 12 mins ago

asked 48 mins ago

Rituraj Kumar

8412

Let's say I create a function in a module file:

function _get_test() 
 return 'test';

How can I call this in any Twig file? For example *.html.twig, page.html.twig, node.html.twig etc.

How can I pass a variable from PHP to Twig and display in any Twig file.
For example *.html.twig, page.html.twig, node.html.twig etc.

8 theming

edited 12 mins ago

asked 48 mins ago

Rituraj Kumar

8412

edited 12 mins ago

asked 48 mins ago

Rituraj Kumar

8412

edited 12 mins ago

asked 48 mins ago

Rituraj Kumar

8412

asked 48 mins ago

Rituraj Kumar

8412

asked 48 mins ago

Rituraj Kumar

8412

add a commentÂ |Â

2 Answers
2

active

oldest

votes

up vote
1
down vote

You can define your own custom Twig functions in a custom module (but not in a theme). To find an example for how to do this, see this example in core/modules/system/tests/modules/twig_extension_test/src/TwigExtension/TestExtension.php (click "View source").

Also see this blog post: Create Twig extensions for Drupal 8.

In this example, we will build an extension to display a Drupal block
directly in a Twig template:

 display_block('my_block_id')

src/MyTwigExtension.php

<?php

namespace DrupalMyTwigModule;

/**
 * Class DefaultService.
 *
 * @package DrupalMyTwigModule
 */
class MyTwigExtension extends Twig_Extension 

 /**
 * @inheritdoc
 * This function must return the name of the extension. It must be unique.
 */
 public function getName() 
 return 'block_display';
 

 /**
 * In this function we can declare the extension function
 */
 public function getFunctions() 
 return array(
 new Twig_SimpleFunction('display_block', 
 array($this, 'display_block'),
 array('is_safe' => array('html')
 )),
 

 /**
 * The php function to load a given block
 */
 public function display_block($block_id) 
 $block = DrupalblockEntityBlock::load($block_id);
 return Drupal::entityManager()->getViewBuilder('block')->view($block);

src/MyTwigModule.services.yml

services:
 MyTwigModule.twig.MyTwigExtension:
 class: DrupalMyTwigModuleMyTwigExtension
 tags:
 - name: twig.extension

answered 36 mins ago

leymannx

6,04242356

add a commentÂ |Â

up vote
1
down vote

You do not call PHP functions in Twig. You can either create a custom Twig extension (see answer from leymannx) or use the global preprocess

function MYTHEME_preprocess(array &$variables, $hook) 
 //this is a global hook, its variables are available in any template file
 $variables['foo'] = 'bar';

foo will then render bar, but this global preprocess might run into caching problems though

answered 32 mins ago

Hudri

968218

It should better be hook_preprocess_HOOK to target a specific template.
â€“Â leymannx
31 mins ago

1

@leymannx I'm explicitly using the one without _HOOK suffix as global preprocess, the ones with a specfic _HOOK suffix aren't global
â€“Â Hudri
28 mins ago

add a commentÂ |Â

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2 Answers
2

active

oldest

votes

2 Answers
2

active

oldest

votes

up vote
1
down vote

Also see this blog post: Create Twig extensions for Drupal 8.

In this example, we will build an extension to display a Drupal block
directly in a Twig template:

 display_block('my_block_id')

src/MyTwigExtension.php

<?php

namespace DrupalMyTwigModule;

/**
 * Class DefaultService.
 *
 * @package DrupalMyTwigModule
 */
class MyTwigExtension extends Twig_Extension 

 /**
 * @inheritdoc
 * This function must return the name of the extension. It must be unique.
 */
 public function getName() 
 return 'block_display';
 

 /**
 * In this function we can declare the extension function
 */
 public function getFunctions() 
 return array(
 new Twig_SimpleFunction('display_block', 
 array($this, 'display_block'),
 array('is_safe' => array('html')
 )),
 

 /**
 * The php function to load a given block
 */
 public function display_block($block_id) 
 $block = DrupalblockEntityBlock::load($block_id);
 return Drupal::entityManager()->getViewBuilder('block')->view($block);

src/MyTwigModule.services.yml

services:
 MyTwigModule.twig.MyTwigExtension:
 class: DrupalMyTwigModuleMyTwigExtension
 tags:
 - name: twig.extension

answered 36 mins ago

leymannx

6,04242356

add a commentÂ |Â

up vote
1
down vote

Also see this blog post: Create Twig extensions for Drupal 8.

In this example, we will build an extension to display a Drupal block
directly in a Twig template:

 display_block('my_block_id')

src/MyTwigExtension.php

<?php

namespace DrupalMyTwigModule;

/**
 * Class DefaultService.
 *
 * @package DrupalMyTwigModule
 */
class MyTwigExtension extends Twig_Extension 

 /**
 * @inheritdoc
 * This function must return the name of the extension. It must be unique.
 */
 public function getName() 
 return 'block_display';
 

 /**
 * In this function we can declare the extension function
 */
 public function getFunctions() 
 return array(
 new Twig_SimpleFunction('display_block', 
 array($this, 'display_block'),
 array('is_safe' => array('html')
 )),
 

 /**
 * The php function to load a given block
 */
 public function display_block($block_id) 
 $block = DrupalblockEntityBlock::load($block_id);
 return Drupal::entityManager()->getViewBuilder('block')->view($block);

src/MyTwigModule.services.yml

services:
 MyTwigModule.twig.MyTwigExtension:
 class: DrupalMyTwigModuleMyTwigExtension
 tags:
 - name: twig.extension

answered 36 mins ago

leymannx

6,04242356

add a commentÂ |Â

up vote
1
down vote

Also see this blog post: Create Twig extensions for Drupal 8.

In this example, we will build an extension to display a Drupal block
directly in a Twig template:

 display_block('my_block_id')

src/MyTwigExtension.php

<?php

namespace DrupalMyTwigModule;

/**
 * Class DefaultService.
 *
 * @package DrupalMyTwigModule
 */
class MyTwigExtension extends Twig_Extension 

 /**
 * @inheritdoc
 * This function must return the name of the extension. It must be unique.
 */
 public function getName() 
 return 'block_display';
 

 /**
 * In this function we can declare the extension function
 */
 public function getFunctions() 
 return array(
 new Twig_SimpleFunction('display_block', 
 array($this, 'display_block'),
 array('is_safe' => array('html')
 )),
 

 /**
 * The php function to load a given block
 */
 public function display_block($block_id) 
 $block = DrupalblockEntityBlock::load($block_id);
 return Drupal::entityManager()->getViewBuilder('block')->view($block);

src/MyTwigModule.services.yml

services:
 MyTwigModule.twig.MyTwigExtension:
 class: DrupalMyTwigModuleMyTwigExtension
 tags:
 - name: twig.extension

answered 36 mins ago

leymannx

6,04242356

Also see this blog post: Create Twig extensions for Drupal 8.

In this example, we will build an extension to display a Drupal block
directly in a Twig template:

 display_block('my_block_id')

src/MyTwigExtension.php

<?php

namespace DrupalMyTwigModule;

/**
 * Class DefaultService.
 *
 * @package DrupalMyTwigModule
 */
class MyTwigExtension extends Twig_Extension 

 /**
 * @inheritdoc
 * This function must return the name of the extension. It must be unique.
 */
 public function getName() 
 return 'block_display';
 

 /**
 * In this function we can declare the extension function
 */
 public function getFunctions() 
 return array(
 new Twig_SimpleFunction('display_block', 
 array($this, 'display_block'),
 array('is_safe' => array('html')
 )),
 

 /**
 * The php function to load a given block
 */
 public function display_block($block_id) 
 $block = DrupalblockEntityBlock::load($block_id);
 return Drupal::entityManager()->getViewBuilder('block')->view($block);

src/MyTwigModule.services.yml

services:
 MyTwigModule.twig.MyTwigExtension:
 class: DrupalMyTwigModuleMyTwigExtension
 tags:
 - name: twig.extension

answered 36 mins ago

leymannx

6,04242356

answered 36 mins ago

leymannx

6,04242356

answered 36 mins ago

leymannx

6,04242356

answered 36 mins ago

leymannx

6,04242356

add a commentÂ |Â

up vote
1
down vote

You do not call PHP functions in Twig. You can either create a custom Twig extension (see answer from leymannx) or use the global preprocess

function MYTHEME_preprocess(array &$variables, $hook) 
 //this is a global hook, its variables are available in any template file
 $variables['foo'] = 'bar';

foo will then render bar, but this global preprocess might run into caching problems though

answered 32 mins ago

Hudri

968218

It should better be hook_preprocess_HOOK to target a specific template.
â€“Â leymannx
31 mins ago

1

@leymannx I'm explicitly using the one without _HOOK suffix as global preprocess, the ones with a specfic _HOOK suffix aren't global
â€“Â Hudri
28 mins ago

add a commentÂ |Â

up vote
1
down vote

You do not call PHP functions in Twig. You can either create a custom Twig extension (see answer from leymannx) or use the global preprocess

function MYTHEME_preprocess(array &$variables, $hook) 
 //this is a global hook, its variables are available in any template file
 $variables['foo'] = 'bar';

foo will then render bar, but this global preprocess might run into caching problems though

answered 32 mins ago

Hudri

968218

It should better be hook_preprocess_HOOK to target a specific template.
â€“Â leymannx
31 mins ago

1

@leymannx I'm explicitly using the one without _HOOK suffix as global preprocess, the ones with a specfic _HOOK suffix aren't global
â€“Â Hudri
28 mins ago

add a commentÂ |Â

up vote
1
down vote

You do not call PHP functions in Twig. You can either create a custom Twig extension (see answer from leymannx) or use the global preprocess

function MYTHEME_preprocess(array &$variables, $hook) 
 //this is a global hook, its variables are available in any template file
 $variables['foo'] = 'bar';

foo will then render bar, but this global preprocess might run into caching problems though

answered 32 mins ago

Hudri

968218

You do not call PHP functions in Twig. You can either create a custom Twig extension (see answer from leymannx) or use the global preprocess

function MYTHEME_preprocess(array &$variables, $hook) 
 //this is a global hook, its variables are available in any template file
 $variables['foo'] = 'bar';

foo will then render bar, but this global preprocess might run into caching problems though

answered 32 mins ago

Hudri

968218

answered 32 mins ago

Hudri

968218

answered 32 mins ago

Hudri

968218

answered 32 mins ago

Hudri

968218

It should better be hook_preprocess_HOOK to target a specific template.
â€“Â leymannx
31 mins ago

1

@leymannx I'm explicitly using the one without _HOOK suffix as global preprocess, the ones with a specfic _HOOK suffix aren't global
â€“Â Hudri
28 mins ago

add a commentÂ |Â

It should better be hook_preprocess_HOOK to target a specific template.
â€“Â leymannx
31 mins ago

1

@leymannx I'm explicitly using the one without _HOOK suffix as global preprocess, the ones with a specfic _HOOK suffix aren't global
â€“Â Hudri
28 mins ago

It should better be hook_preprocess_HOOK to target a specific template.
â€“Â leymannx
31 mins ago

@leymannx I'm explicitly using the one without _HOOK suffix as global preprocess, the ones with a specfic _HOOK suffix aren't global
â€“Â Hudri
28 mins ago

add a commentÂ |Â

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