Illuminate\Database\Query\Builder::setBindings PHP Method

    public function setBindings(array $bindings, $type = 'where')
    {
        if (!array_key_exists($type, $this->bindings)) {
            throw new InvalidArgumentException("Invalid binding type: {$type}.");
        }
        $this->bindings[$type] = $bindings;
        return $this;
    }

 protected function compileJoins(LaravelBaseBuilder $query, $joins)
 {
     $sql = array();
     $query->setBindings(array(), 'join');
     foreach ($joins as $join) {
         $table = $this->wrapTable($join->table);
         // First we need to build all of the "on" clauses for the join. There may be many
         // of these clauses so we will need to iterate through each one and build them
         // separately, then we'll join them up into a single string when we're done.
         $clauses = array();
         foreach ($join->clauses as $where) {
             if (isset($where['type'])) {
                 $method = "where{$where['type']}";
                 $clauses[] = $where['boolean'] . ' ' . $this->{$method}($query, $where);
             } else {
                 $clauses[] = $this->compileJoinConstraint($where);
             }
         }
         foreach ($join->bindings as $binding) {
             $query->addBinding($binding, 'join');
         }
         // Once we have constructed the clauses, we'll need to take the boolean connector
         // off of the first clause as it obviously will not be required on that clause
         // because it leads the rest of the clauses, thus not requiring any boolean.
         $clauses[0] = $this->removeLeadingBoolean($clauses[0]);
         $clauses = implode(' ', $clauses);
         $type = $join->type;
         // Once we have everything ready to go, we will just concatenate all the parts to
         // build the final join statement SQL for the query and we can then return the
         // final clause back to the callers as a single, stringified join statement.
         $sql[] = "{$type} join {$table} on ({$clauses})";
     }
     return implode(' ', $sql);
 }