Member Avatar for showman13

Good Morning All, and HAPPY NEW YEAR to everyone, whether you celebrate it or not...

I have what should be a relatively simple question that I would like to pose that could avoid a very lengthy one...

if I create an associative array and place several key>value pairs in the array, will they remain in the order that they are placed, or will they be re-ordered in any way?

I want to create the array and then run an array_search on the $values to find the minimum value in the array.

I guess that would make a second question... I know I can do an array search on an array that I push values onto, but that isn't an associative array, so not sure I can even do that..

Any feedback would be greatly appreciated and would most likely save me hours of research time.

thanks
Douglas

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Short answer: PHP associative arrays preserve insertion order (they are implemented as ordered maps), so keys stay in the order you added them unless you explicitly reorder or re-index the array. This matches ’s reply and can be confirmed with a dump as suggested.

If the goal is “find the minimum value and its key”, common approaches:

  • Built-ins: min($arr) returns the smallest value. To get all keys that have that value use array_keys($arr, $minValue, true). To get the first key only use array_search($minValue, $arr, true) but remember array_search returns false when not found — check with === false to avoid confusing key 0 with not-found.

Example to get every key with the minimum value:

$min = min($arr);
$keys = array_keys($arr, $min, true);

For a single-pass, slightly faster method (one loop, useful for very large arrays or custom comparisons):

$minKey = null;
$minVal = null;
foreach ($arr as $k => $v) {
  if ($minKey === null || $v < $minVal) {
    $minVal = $v;
    $minKey = $k;
  }
}

Caveats and troubleshooting:

  • Be careful about types: numeric strings vs numbers can yield surprising results; cast to int/float if needed before comparing.
  • Duplicate minimums: array_search returns the first match; use array_keys to get all matches.
  • Sorting/reindexing functions change order or keys: sort(), rsort(), usort() reindex numeric keys; asort()/arsort() preserve key association but reorder the array; unset() then re-adding a key moves it to the end while updating an existing key does not change its position.

This expands on the earlier replies and shows both quick built-in methods and a robust single-pass option.

Recommended Answers

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Member Avatar for Tpojka

Happy New Year you too.

First part of question you can make answered with just output of array:

$myArray = array('zero' => '0', 'first' => '1st', 'second' => '2nd', 'third' => '3rd');
print_r($myArray);

Second part of question you can solve with function min but also depends of type of variables you have in values of array.

Member Avatar for jkon

Hello Douglas and a happy new year,

if I create an associative array and place several key>value pairs in the array, will they remain in the order that they are placed, or will they be re-ordered in any way?

They will remain in the order that you inserted them to the array , except if you want to re-ordered the associative array in any way through various PHP function (e.g. ksort asort)

I know I can do an array search on an array that I push values onto, but that isn't an associative array, so not sure I can even do that..

The same way … array_search will give the index of the array or false if not any matching your criteria.

Member Avatar for showman13

Thank you Both for your responses...

jkon, I appreciate precise answers, and I believe that your answers were exactly what I was looking for...

I should know how it works for me in the morning and will post the results before marking this as solved...

Thanks again
Douglas

Member Avatar for showman13

Thanks again jkon.

that was exactly what I needed to solve the problem.

working fine

Douglas

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