PHP Array Slice understanding

Question

I have the following array:

Array

Array (
[0] => Array (
  ...
)
[41] => Array (
  [name] => London 
  [company] => nhyt6t
  [top25_1] => 8.75912088
)
[42] => Array (
  [name] => Manchester
  [company] => gtr4rf
  [top25_1] => 6.56758398
)
  ...
[75] => Array (
  [name] => Leeds
  [company] => de3wsd6
  [top25_1] => 7.58675398
)
)

If my reading and understanding of http://www.php.net/manual/en/function.array-slice.php is correct, then the following should return just those within the array with an index of between 40 and 65.

$array = array_slice($array, 40, 65);

However, in practise, what this does is remove Indexes 0 through 39 but leaves everything else.

Can anyone explained where I am going wrong?

hsz · Accepted Answer · 2014-07-04 13:45:13Z

2

Just try with:

$array = array_slice($array, 40, 65 - 40);

So:

$array = array_slice($array, 40, 25);

We start slicing from 40 position and get 25 elements (ending on 40+25=65 position).

answered Jul 4, 2014 at 13:45

hsz

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1 Comment

Niet the Dark Absol Over a year ago

65 - 40 + 1 if you want 65 to be included in the result.

Strikeskids · Accepted Answer · 2014-07-04 13:46:26Z

1

Array slice chooses an offset and length, not a begin offset and end offset. It starts at the begin offset and chooses the next length elements. If your array has continuous indices (0,1,2,3,4...), then it will slice from [offset -> offset + length)

answered Jul 4, 2014 at 13:46

Strikeskids

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3 Comments

Homer_J Over a year ago

Must admit to struggling to get my head around the way this works.

Strikeskids Over a year ago

My explanation, or the documentation?

Homer_J Over a year ago

Not your explanation - the documentation and concept! LOL, sorry if it came across differently!

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