public function set($value = null)
	{
		$ts = sfDateTimeToolkit::getTS($value);
		
		$this->ts = $ts;
		if ($this->init === null)
		{
			$this->init = $ts;
		}
		
		return $this;
	}
public function set($value = null)
	{
		$ts = sfDateTimeToolkit::getTS($value);
		
		$this->ts = $ts;
		if ($this->init === null)
		{
			$this->init = $ts;
		}
		
		return $this;
	}
public function set ( $ value = null ) { $ ts = sfDateTimeToolkit :: getTS ( $ value ) ; $ this -> ts = $ ts ; if ( $ this -> init === null ) { $ this -> init = $ ts ; } return $ this ; }
Sets the timestamp value of this sfDate instance.

This function accepts several froms of a date value:
- timestamp
- string, parsed with <code>strtotime</code>
- sfDate object

@return	sfDate	the modified object, for chainability
Sets the timestamp value of this sfDate instance .