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请教获取数组中key的值不为空的个数,用什么函数

WBOY
WBOY Original
2016-06-13 11:13:56 898browse

请问获取数组中key的值不为空的个数,用什么函数?
例如数组:

Array
(
[0] => aa
[1] => bb
[2] => cc
[3] =>
)

如果用count,结果是4,把没有值的key也包含在内了。但我想得到值不为空的key的个数?应该是3,请问有什么函数可以实现吗?


------解决方案--------------------

$arr = array (
0 => 'aa',
1 => 'bb',
2 => 'cc',
3 => ''
);
function filter_empty($var) {
return ! empty ( $var );
}
echo count ( array_filter ( $arr, 'filter_empty' ) );

------解决方案--------------------

print_r(count(array_filter($arr)));
/*
手册
array array_filter ( array $input [, callback $callback ] )
如果没有提供 callback 函数,array_filter() 将删除 input 中所有等值为 FALSE 的条目
空的布尔值为false
*/
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