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关于php数组，怎么显示元素本身字符

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Release： 2016-06-13 13:50:33
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关于php数组，如何显示元素本身字符？
$data['a']=1;
$data['b']=2;
$data['c']=3;

我想显示：
a
b
c

不是要显示元素的值，而是要显示元素本身的字符

------解决方案--------------------
你说的是key?

$data=array('a'=>1,'b'=>2,'c'=>3);

foreach ($data as $key=>$value){
echo $key;
}
是不是key?还是啥意思.

Related labels：
data foreach gt key
source：php.cn
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