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<?php
declare(strict_types = 1);
namespace Puzzle\QueryBuilder\Queries\Snippets;
use Puzzle\QueryBuilder\Snippet;
class Distinct implements Snippet
{
private
$columnName;
$columnName
The PSR-2 coding standard requires that all properties in a class have their visibility explicitly declared. If you declare a property using
class A { var $property; }
the property is implicitly global.
To learn more about the PSR-2, please see the PHP-FIG site on the PSR-2.
public function __construct(?string $columnName)
if(empty($columnName))
throw new \InvalidArgumentException('Empty column name.');
}
$this->columnName = (string) $columnName;
public function toString(): string
return sprintf('DISTINCT %s', $this->columnName);
The PSR-2 coding standard requires that all properties in a class have their visibility explicitly declared. If you declare a property using
the property is implicitly global.
To learn more about the PSR-2, please see the PHP-FIG site on the PSR-2.