SQL LIKE this OR that - php

Question

I'm trying to do:
(i'm working with codeignitor)
$conditions = $tri." LIKE'%".$prenomNom."%' OR LIKE'%".$nomPrenom."%'";
I also tried:
$conditions = ($tri." LIKE '%".$prenomNom."%' OR ".$tri." LIKE '%".$nomPrenom."%'");
But the OR doesn't work... my request return only $tri like $nameLastname.
When i do echo of $nameLastname and $LastnameName everything is ok.
My code
public function rechercheParAuteur($selection = "*", $recherche = "", $tri = "", $champs_order = "id", $direction_ordre = "ASC", $nombre_limite = NULL, $debut_limite = NULL){
//$conditions = "titre LIKE '%".$recherche."%'"; //création de la condition personnalisée
$testrecherche = str_replace("'","\'", $recherche);
$rechercheArray = explode(" ", $testrecherche);
if (isset($rechercheArray[1]))
{
$nomPrenom = $rechercheArray[0]." ".$rechercheArray[1];
$prenomNom = $rechercheArray[1]." ".$rechercheArray[0];
//$conditions = $tri." LIKE'%".$prenomNom."%' OR LIKE'%".$nomPrenom."%'";
$conditions = ($tri." LIKE '%".$prenomNom."%' OR ".$tri." LIKE '%".$nomPrenom."%'");
//echo $nomPrenom; OK
//echo $prenomNom; OK
}
else
{
$resultat = $rechercheArray[0];
$conditions = $tri." LIKE '%".$resultat."%'";
}
$retour= $this->db->select($selection)
/*à partir de quelle table*/
->from($this->table)
/*déterminer des conditions spécifiques*/
->where($conditions)
/*déterminer un ordre précis*/
->order_by($champs_order, $direction_ordre)
/*déterminer une limite*/
->limit($nombre_limite, $debut_limite)
/*obtenir les résultats (va de pair avec result()*/
->get()
/*retourner les résultats sous forme de tableau*/
->result_array();
return $retour;

Answer 1

You probably want to put the condition in perens.
$conditions = "($tri LIKE '%$prenomNom%' OR $tri LIKE '%$nomPrenom%')";