symfony - Textarea field with data Transformer -

i have form textarea field(where user adds domains names, each per line) , data transformer transforms string array:

$builder->add(             $builder->create('domains', 'textarea', [                 'trim' => false,                 'constraints' => [                     new assert\notblank(),                     new assert\all([                         'constraints' => [                             new assert\notblank(),                             new domain(),                             new registerdomain(),                         ]                     ])                 ]             ])->addmodeltransformer(new arraytostringtransformer())         ); 

arraytostringtransformer

public function transform($values)     {         if (empty($values)) {             return '';         }             return implode($this->delimiter, $values);             }   public function reversetransform($string)     {                 if (!$string) {             return [];         }          return array_filter(array_map('trim', explode($this->delimiter, $string)));      }  

each domain should on new line. however, when string value on reversetransform value dont bring new lines. setted option trim false on field.

any idea why happen?

my delimiter is: '\n' tried '\r\n'.

well seems solution use double quotes , not single. so, if use "\r\n" works expected.

thanks.

newlines in input data can take 2 forms: \r or \n. split data using both of them.

return implode("\r\n", $values);