array_udiff的困惑
今天看书,书中有一个例子用到了array_udiff,查了下手册,经过测试,还是对其一知半解.
$a = array(1,2,3,4,5);<br />$b = array(1,6,3,4,5);<br />echo "<pre class="brush:php;toolbar:false">";<br />print_r(array_udiff($a,$b,function($a,$b){<br /> return ($a === $b)? 0:1;<br />}));Array<br />(<br /> [0] => 2<br />)
Array<br />(<br /> [0] => 1<br /> [1] => 2<br /> [2] => 3<br /> [4] => 5<br />)
