How does php obtain the array key name instance code?

Source: Internet
Author: User
Tags php foreach

My php foreach () function can traverse the array and retrieve the key value of the array. How can I get the key name $ key? Or just take the first key name? For example

The code is as follows: Copy code

$ Keyarray = array (
'000000' => '2b70e63ffdf ',
'000000' => '20767a021'

In the first method, I can use foreach to retrieve the first key name.

The code is as follows: Copy code

Foreach ($ keyarray as $ key => $ value ){
$ A [] = $ key;
Print_r ($ a [0]); exit;

You can also use print_r ($ a); to retrieve all key names, use the array_keys () function.

The code is as follows: Copy code

$ ArrKeys = array_keys ($ keyarray );
Print_r ($ arrKeys [0]); exit;

The above methods can achieve the same effect.

Related Article

E-Commerce Solutions

Leverage the same tools powering the Alibaba Ecosystem

Learn more >

Apsara Conference 2019

The Rise of Data Intelligence, September 25th - 27th, Hangzhou, China

Learn more >

Alibaba Cloud Free Trial

Learn and experience the power of Alibaba Cloud with a free trial worth $300-1200 USD

Learn more >

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.