How does PHP index associative arrays?

Question

As I know, in associative arrays, if the keys is not set, it will be set automatically. But it seem doesn\'t make sense in this case:

$a = array         


        

Answer 1

@Uchiha is right, just as an include to that answer, if you want to avoid this problem, keep members of an array (which are not having keys specified) at the last

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$a = array( '1' => 'One', '3', '2' => 'Two');

will dump

array (size=2)
  1 => string 'One' (length=3)
  2 => string 'Two' (length=3)

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and keeping members with undefined keys at last

$a = array( '1' => 'One', '2' => 'Two', '3');

will dump

array (size=3)
  1 => string 'One' (length=3)
  2 => string 'Two' (length=3)
  3 => string '3' (length=1)

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will avoid issues you are facing.