我的数组:
$arr = array("jan","feb","mar","apr","mei","jun","jul","agu","sep","okt","nov","des");
然后我用foreach循环遍历:
foreach($arr as $ar){ echo $ar; }
这将输出从jan到des的值。
我的问题是如何在当前键中显示前一个值?
例如,当我到达feb时,我想显示jan,当我到达jul时,我想显示jun,等等。
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