dantleech/symfony-form-array-to-delimited-string-transformer

Data transformer for SF form. Transforms delimited to string to array and vice-versa

Array to delimited string data transformer

, _(*1)

This is a data transformer for the Symfony form framework., _(*2)

It is meant for transforming text fields containing delimited strings to arrays., _(*3)

Usage

You can use the data transformer as follows:, _(*4)

$form->add(
    $builder->create('tags', 'text')->addModelTransformer(
        new ArrayToDelimitedStringTransformer()
    )
);

This will transform the tags text field as follows:, _(*5)

// Tranform
array('one', 'two', 'three', 'four') === 'one, two, three, four'

// Reverse transform
'   one ,  two    , three, four,' === array('one', 'two', 'three', 'four')

Changing the delimiter

You can change the delimiting string with the first constructor argument:, _(*6)

new ArrayToDelimitedStringTransformer(';')

Will result in:, _(*7)

// Transform
array('one', 'two', 'three', 'four') === 'one; two; three; four'

// Reverse Transform
'one   ; two;three ;     four' => array('one', 'two', 'three')

Output padding

Additionally you can change the way in which the output is formatted with by setting the amount of whitespace (padding) before and after the text elements produced by a transformation:, _(*8)

new ArrayToDelimitedStringTransformer('%', 1, 1)

Will result in:, _(*9)

// Transform
array('one', 'two', 'three', 'four') === 'one % two % three % four'

// Reverse Transform
'one   % two%three %     four' => array('one', 'two', 'three')