url_encode
The url_encode
filter percent encodes a given string as URL segment or a
mapping as query string:
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{{ "path-seg*ment"|url_encode }}
{# outputs "path-seg%2Ament" #}
{{ "string with spaces"|url_encode }}
{# outputs "string%20with%20spaces" #}
{{ {'name': 'Fabien', 'city': 'Paris'}|url_encode }}
{# outputs "name=Fabien&city=Paris" #}
Note
Internally, Twig uses the PHP rawurlencode or the http_build_query function.