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Zend Framework 2 Documentation (Manual)

File: /_sources/modules/zend.stdlib.hydrator.namingstrategy.underscorenamingstrategy.txt

.. _zend.stdlib.hydrator.namingstrategy.underscorenamingstrategy:

UnderscoreNamingStrategy
========================

``Zend\Stdlib\Hydrator\NamingStrategy\UnderscoreNamingStrategy`` Converts snake case strings (e.g. foo_bar_baz) to studly case strings (e.g. fooBarBaz) and vice versa. 

Example Usage
-------------

.. code:: php

    <?php
    $namingStrategy = new \Zend\Stdlib\Hydrator\NamingStrategy\UnderscoreNamingStrategy();
    echo $namingStrategy->extract('foo_bar'); // outputs: foo_bar
    echo $namingStrategy->extract('Foo_Bar'); // outputs: foo_bar
    echo $namingStrategy->extract('FooBar'); // outputs: foo_bar

    echo $namingStrategy->hydrate('fooBar'); // outputs: fooBar
    echo $namingStrategy->hydrate('FooBar'); // outputs: fooBar
    echo $namingStrategy->hydrate('Foo_Bar'); // outputs: fooBar
    ?>

This strategy can be used in hydrators to dictate how keys should be mapped.

.. code:: php

    <?php
    class Foo {
        public $fooBar;
    }

    $hydrator = new \Zend\Stdlib\Hydrator\ObjectProperty();
    $hydrator->setNamingStrategy(new \Zend\Stdlib\Hydrator\NamingStrategy\UnderscoreNamingStrategy());

    $foo = new Foo();
    $hydrator->hydrate(['foo_bar' => 123],$foo);

    print_r($foo); // Foo Object ( [fooBar] => 123 )
    print_r($hydrator->extract($foo)); // Array ( [foo_bar] => 123 )
    ?>