msql查询中报错 Unknown column '黄色水果' in 'where clause'

<?php
   $positionarr = ['1'=>'绿色蔬菜','2'=>'红色蔬菜','3'=>'黄色蔬菜', '4'=>'绿色水果', '5'=>'红色水果', '6'=>'黄色水果'];   $positionarr = ['1'=>'绿色蔬菜','2'=>'红色