数组换位有关问题
数组换位问题
- PHP code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ --> $array = array( 'ab'=>123, 'ef'=>234, 'hc'=>654 )
我现在想让hc和ab换个位置,其中包括(key和value)
换位后的结果
- PHP code
<!-- Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ --> $array = array( 'hc'=>654, 'ef'=>234, 'ab'=>123, )
有哪些方法能办到?
方法之一:声明一个新数组,循环$array数组,做判断来换位!
本人喜欢找更高效的方法,特来发帖求教
------解决方案--------------------
php数组排序..................
你这个例子的可以使用"krsort()".
其余的情况就不一定了.
------解决方案--------------------
$array = array(
'ab'=>123,
'ef'=>234,
'hc'=>654
);
echo "
";<br>print_r($array);<br><br>ksort($array,1);<br>print_r($array); <br><font color="#e78608">------解决方案--------------------</font><br>
------解决方案--------------------
uksort()
自己订好规则.
------解决方案--------------------
关键是LZ你要根据什么规则来换位啊??
$array = array(
'ab'=>123,
'ef'=>234,
'hc'=>654,
'ht'=>456,
'ty'=>421,
);
那我是不是要ab hc 换位 // ef ht换位// hc ht 换位 ???
你总的有个参考吧
------解决方案--------------------
数组循环一次,O(n)复杂度,效率有什么问题?
------解决方案--------------------
我感觉foreach 就ok了 一个数组不存在什么效率问题吧

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