ThinkPHP query returns a simple field array method, thinkphp array_PHP tutorial

ThinkPHP query returns a simple field array method, thinkphp array

The example in this article describes how ThinkPHP query returns a simple field array, which is a very practical function in ThinkPHP programming. The specific method is as follows:

Usually use select statements. What is returned are field arrays with more complex structures. For example, the following is a simple query:

$map['parentid'] = $id;
$sub_ids = D('Category')->where($map)->field("catid")->select();

After querying, the result is:

[{"catid":"23"},{"catid":"24"},{"catid":"25"},{"catid":"26"},{"catid":"27"},{"catid":"28"},{"catid":"29"},{"catid":"30"}]

From the structure, we can see that this is an array with a more complex structure, and its element is a map.
If we just need a simple array containing only numeric field elements, we can use the following method:

$sub_ids = D('Category')->where($map)->getField('catid',true);

After querying, the result is:

["23","24","25","26","27","28","29","30"]

The query results immediately became much clearer!

I hope the method described in this article will be helpful to everyone’s learning of ThinkPHP.

What should I do if thinkphp’s getField queries two fields and returns something other than the official two-dimensional array?

Hello~~
$data = $setting->field('id,title')->select();

Problem in ThinkPHP: Query an array from the database (all URLs of other websites), and then query the HTML page

That’s because you didn’t write http://

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