简单教程
提交运行
代码编辑器：
<?php $people = array("Peter","Joe","Glenn","Cleveland"); echo "当前位置的键是: " . key($people);
x
1
<?php
2
$people
=
array
(
"Peter"
,
"Joe"
,
"Glenn"
,
"Cleveland"
);
3
echo
"当前位置的键是: "
.
key
(
$people
);
4
5
运行结果：