array_search没有找到所有的值。

Array
(
    [0] => 159042564114859_722842697734840
    [1] => 180466813056_10152147419628057
    [2] => 201613513237343_622449081153782
)


$post_ids = array('201613513237343_622449081153782', '180466813056_10152147419628057', '159042564114859_722842697734840');

foreach($posts->data as $post)
{
    if(array_search( $post->id, $post_ids ))
    {
        print '<p>FOUND ' . $post->id . '<p>';

    }
}

Outputs:

输出:

FOUND 159042564114859_722842697734840

FOUND 180466813056_10152147419628057

For some reason, it does not detect the third item in the array, with the index of 3, value of 201613513237343_622449081153782

由于某种原因，它没有检测到数组中的第三个项，索引为3，值为201613513237343_622449081153782

This outputs:

这个输出:

foreach($posts->data as $post)
{
    print '<p>post->id: ' . $post->id . '</p>'; 
}

post->id: 159042564114859_722842697734840

post->id: 180466813056_10152147419628057

post->id: 201613513237343_622449081153782

So I know the data is in there, what am I doing wrong with the array_search function?

我知道数据在这里，array_search函数哪里出错了?

1 个解决方案

#1

It doesn't output the first post id because array_search returns the index, which is 0.

它不会输出第一个post id，因为array_search返回索引，即0。

Change your check to:

改变你的检查:

if (array_search($post->id, $post_ids) !== false) {

to explicitly compare with false.

与false进行显式比较。

0 == false; // true
0 === false; // false

PHP is not very nice about it's arguments and return values, but most search functions use some kind of 'not found' value. -1, false and null are common values used for this purpose.

PHP对于它的参数和返回值不是很好，但是大多数搜索函数都使用某种“未找到”值。-1、false和null是用于此目的的通用值。

#1