sort() returns true instead of the sorted array [duplicate]

Question

Odd...

// array sort test

$_ar = array(
  0 => "2015-02-23",
  1 => "2015-02-21",
  2 => "2015-02-28",
  3 => "2015-03-20",
  4 => "2015-03-14",
  5 => "2015-03-21",
  6 => "2015-02-21",
  7 => "2015-02-28",
  8 => "2015-03-07",
  9 => "2015-03-14",
);
$_ar = sort($_ar);

var_dump($_ar);
// returns bool(true)

$__ar = array(
  0 => "2015 02 23",
  1 => "2015 02 21",
  2 => "2015 02 28",
  3 => "2015 03 20",
  4 => "2015 03 14",
  5 => "2015 03 21",
  6 => "2015 02 21",
  7 => "2015 02 28",
  8 => "2015 03 07",
  9 => "2015 03 14",
);
$__ar = sort($__ar);

var_dump($__ar);
// returns bool(true)

$ar = array(
  0 => "20150223",
  1 => "20150221",
  2 => "20150228",
  3 => "20150320",
  4 => "20150314",
  5 => "20150321",
  6 => "20150221",
  7 => "20150228",
  8 => "20150307",
  9 => "20150314",
);

$ar = sort($ar);

var_dump($ar);
// returns bool(true)

I am expecting this to return the array sorted by the date value. I thought maybe it was the - (hyphen) or spaces, but in all my examples my PHP var_dump simply returns bool(true) for each instance. Can someone confirm they get the same, or point out what I must be missing.... I have tried asort() - still the same.

Rizier123 · Accepted Answer · 2015-02-19 14:38:55Z

2

You don't have to assign the return value of sort(). For more information about sort() see the manual: http://php.net/manual/en/function.sort.php

And a quote from there:

Returns TRUE on success or FALSE on failure.

So just to this:

sort($_ar);

Side Note:

I wouldn't recommend you to define variables with underscores at the start of the name, since this already get's used by defined php variables e.g. super globals or magic constants

answered Feb 19, 2015 at 14:38

Rizier123

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Comments

Utkarsh Dixit · Accepted Answer · 2015-02-19 14:39:08Z

The sort and asort function returns bool value. Just call this function and it will sort the array, don't store it , it returns true or false.Use the code below

// array sort test

$_ar = array(
  0 => "2015-02-23",
  1 => "2015-02-21",
  2 => "2015-02-28",
  3 => "2015-03-20",
  4 => "2015-03-14",
  5 => "2015-03-21",
  6 => "2015-02-21",
  7 => "2015-02-28",
  8 => "2015-03-07",
  9 => "2015-03-14",
);
 sort($_ar);

var_dump($_ar);
// returns bool(true)

$__ar = array(
  0 => "2015 02 23",
  1 => "2015 02 21",
  2 => "2015 02 28",
  3 => "2015 03 20",
  4 => "2015 03 14",
  5 => "2015 03 21",
  6 => "2015 02 21",
  7 => "2015 02 28",
  8 => "2015 03 07",
  9 => "2015 03 14",
);
$__ar = sort($__ar);

var_dump($__ar);
// returns bool(true)

$ar = array(
  0 => "20150223",
  1 => "20150221",
  2 => "20150228",
  3 => "20150320",
  4 => "20150314",
  5 => "20150321",
  6 => "20150221",
  7 => "20150228",
  8 => "20150307",
  9 => "20150314",
);

sort($ar);

var_dump($ar);
// returns bool(true)

Hope this helps you

doh! of course.. thanks - was going cross-eyed then for a moment!
@Nick You are welcome just accept this answer as correct. I am glad that i helped you

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