PHP basename Twig equivalent

问题:

Is there an equivalent function to PHP basename() in Twig ?

Something like:

$file = basename($path, ".php");

回答1:

With Twig we can find the string after the last dot (.) and remove it from the string in order to get the filename (but it won't work if there is multiple dots).

{% set string = "file.php" %}
{{ string|replace({ ('.' ~ string|split('.')|last): '' }) }}
{# display "file" #}
{% set string = "file.html.twig" %}
{{ string|replace({ ('.' ~ string|split('.')|last): '' }) }}
{# display "file.html" and not "file" #}

Explanation:

{{ string|replace({     # declare an array for string replacement
    (                   # open the group (required by Twig to avoid concatenation with ":")
        '.'
        ~               # concatenate 
        string
            |split('.') # split string with the "." character, return an array
            |last       # get the last item in the array (the file extension)
    )                   # close the group
    : ''                # replace with "" = remove
}) }}

回答2:

By default there is no default basename style of filter in Twig, but if you need to extend the default Twig filters or functions with your own, you can create an extension as described in the cookbook for your version of Symfony. http://symfony.com/doc/current/cookbook/templating/twig_extension.html

Twig Extension

// src/AppBundle/Twig/TwigExtension.php
namespace AppBundle\Twig;

class TwigExtension extends \Twig_Extension
{

    public function getName()
    {
       return 'twig_extension';
    }

    public function getFilters()
    {
       return [
           new \Twig_SimpleFilter('basename', [$this, 'basenameFilter'])
       ];
    }

    /**
     * @var string $value
     * @return string
     */
    public function basenameFilter($value, $suffix = '')
    {
       return basename($value, $suffix);
    }
}

Config File

# app/config/services.yml
services:
    app.twig_extension:
        class: AppBundle\Twig\TwigExtension
        public: false
        tags:
            - { name: twig.extension }

Twig Template

{% set path = '/path/to/file.php' %}
{# outputs 'file.php' #}
{{ path|basename }}

{# outputs 'file' #}
{{ path|basename('.php') }}

{# outputs 'etc' #}
{{ '/etc/'|basename }}


{# outputs '.' #}
{{ '.'|basename }}

{# outputs '' #}
{{ '/'|basename }}