Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
491 views
in Technique[技术] by (71.8m points)

php - Finding the position of an element in a simple array

Let's say we have this array:

Array ( [0] => 10 [1] => 45 [2] => 23 ) 

How can I determine the position of element '45' in this array?

I'm using PHP.

Thank you.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

Use array_search to get the key to a value:

$key = array_search(45, $arr);

And if you want to get its position in the array, you can search for the index of the key in the array of keys:

$offset = array_search($key, array_keys($arr));

So with an array like the following you will still get 1 as result:

$arr = array('foo' => 10, 'bar' => 45, 'baz' => 23);

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

2.1m questions

2.1m answers

60 comments

57.0k users

...