I have the following PHP SELECT Query.  It is in CodeIgnitor format.  What I'm not certain about is in the where clause I need to add more.  
$laser_query = ee()->db->select('entry_id')
		->where('col_id_6401', $cw)
		$laser_finder = $laser_query->result_array();
		foreach($laser_query->result_array() as $row){
   			echo $row['entry_id'].'<br />';

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I need to add additional OR's to it, for example:
->where('col_id_6401', $cw) OR ('col_id_6401',$pw) OR (;col_id_6401, $lm)

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Peos JohnPHPCommented:
Try if the following works for you..

->where('col_id_6401 =', $cw)
->or_where('col_id_6401=', $pw)...

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Loganathan NatarajanLAMP DeveloperCommented:
Check this way,

$this->db->where("(col_id_6401=$cw  OR col_id_6401=$pw OR col_id_6401=$lm)", NULL, FALSE);

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Marco GasiFreelancerCommented:
Please, no points for this: $this->db->or_where() is the right solution. Please refer to this link:
Julian HansenCommented:
It think you are wanting to use the where_in() function

$ids = array($cw, $pw, $lm);
$laser_query = ee()->db->select('entry_id')
		->where_in('col_id_6401', $ids)

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