如何从数组中删除键以仅在 PHP 中创建值列表？

Question

I have a method that passes in an array, and requires a list of int numbers separated by commas to be taken from the passed in array. When I pass in the array, I obviously see the key=>value relationship like:

0 => 38
1 => 39
2 => 40
3 => 41

But in my method, I need to remove the key for each item in the array, and build a literal list of int numbers - not a string - to be used in my method like the following:

[38, 39, 40, 41]

I can't do a foreach and simply echo each value, as my method only runs once and requires a literal list of int s followed by commas to be used further down deep in my method. When I iterate through the array to build a new array, keys are created there too. I can't simply pass in a string, as that would have quotes at the beginning and end of the string. I'm a bit confused how to approach this. Any help would be greatly appreciated.

Answer 1

$array = [1,2,3,4];
$new_value = implode(',',$array);

Answer 2

Both your arrays are same, [38, 39, 40, 41] . Here 38 is at index 0 , 39 at 1 . you can use array_values if you want to pick only array values or reset your index values if they are not aligned ie 0,1,2. With implode , you will be converting your array to string which will not include [ ] . So you can pass your complete array as it is in your further methods. If you want to output it is a string [38, 39, 40, 41] then this can be achieved like this.

 echo '['.implode(", ",$arr).']';