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59 lines (53 loc) · 1.11 KB
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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 = ?');