Question

php中为什么多个foreach循环中获取不到上一个foreach循环的key值

Answer 1

能获取到的，应该是你的代码写错了，或者命名不规范：
<?php
$variable = array('0' => array('a' =>array('x' => array('0' => 4,'1'=>5 ),'y' =>array('0' => 1,'1'=>3 )) ,'b' =>array('s' => 7,'g' =>9)),'1'=>array('a' =>array('x' => array('0' => 8,'1'=>6 ),'y' =>array('0' => 4,'1'=>4 )) ,'b' =>array('s' => 10,'g' =>11)) );
foreach ($variable as $key => $value) {

foreach ($value as $k => $v) {

foreach ($v as $ke => $va) {
echo $key;
echo $k;
echo $ke;
exit;

}
}
}
这个都是可以输出对应的键的，不知道是我理解错误？