Merge array items into string

Question

How do I merge all the array items into a single string?

Answer 1

For Multi Array such as:

 $multi_arrays = array(
            0 => array('model' => 'Product 1'),
            1 => array('model' => 'Product 2'),
            2 => array('model' => 'Product 3'),
            3 => array('model' => 'Product 4'));

 $pattern = array('/\[/', '/\]/', '/{"model":/', '/}/', '/\"/');

 $str_models = preg_replace($pattern, '', json_encode( $multi_arrays));

The result will be:

Product 1, Product 2, Product 3, Product 4

You can change pattern for get any result you want!