DesignPatternsPHP/FluentInterface/FluentInterface.php at master · phybros/DesignPatternsPHP · GitHub

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<?php

namespace DesignPatterns;

/**

* fluent interface pattern

* Purpose:

* to write code that is easy readable just like "real" sentences

* Examples:

* - Doctrine2's QueryBuilder works something like that example class below

* - PHPUnit uses fluent interfaces to build mock objects

class SQL

{

protected $_fields = array();

protected $_from = array();

protected $_where = array();

/**

* @param array $fields

* @return SQL

public function select(array $fields = array())

{

$this->_fields = $fields;

return $this;

}

/**

* @param string $table

* @param string $alias

* @return SQL

public function from($table, $alias)

{

$this->_from[] = $table . ' AS ' . $alias;

return $this;

}

/**

* @param string $condition

* @return SQL

public function where($condition)

{

$this->_where[] = $condition;

return $this;

}

$instance = new SQL();

$instance->select(array('foo', 'bar'))

->from('foobar', 'f')

->where('f.bar = ?');

DesignPatternsPHP/FluentInterface/FluentInterface.php at master · phybros/DesignPatternsPHP · GitHub

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