给定以下 php 数组
$a = array(
array('a'=>'111','b'=>'two','c'=>'asdasd'),
array('a'=>'111','b'=>'one','c'=>'sdvsdfs'),
array('a'=>'111','b'=>'three','c'=>'vbndfgn'),
array('a'=>'222','b'=>'nine','c'=>'dfhfnd')
);
如何仅返回每个数组键“a”的最后一个数组?
期望的结果:
$new = array(
array('a'=>'111','b'=>'three','c'=>'vbndfgn'),
array('a'=>'222','b'=>'nine','c'=>'dfhfnd')
);