phinx-add-index.php

<?php
    public function change()                                                                                                
    {                                                                                                                       
            $table = $this->table('photographers');                                                                         
            $table->addIndex(['name', 'phone'], ['unique' => true])                                                         
                    ->update();                                                                                             
                                                                                                                            
    }