I need an array sorted by Unix timestamp values. I attempted to use both ksort and krsort before realising that occasionally the timestamp values might be the same (and you cannot have duplicate keys in arrays).
Here's an example array I may be faced with:
$array = array(
[
"unix" => 1556547761, // notice the two duplicate unix values
"random" => 4
],
[
"unix" => 1556547761,
"random" => 2
],
[
"unix" => 1556547769,
"random" => 5
],
[
"unix" => 1556547765, // this should be in the 3rd position
"random" => 9
]
);
So what I'm trying to do is sort them all based on each child arrays unix value, however I cannot figure out how to do so. I have tried countless insane ways (including all other sort functions and many, many for loops) to figure it out - but to no avail.
All help is appreciated.
dWinder :
You can use usort which sort your array by given function\n\nDefine function as:\n\nfunction cmpByUnix($a, $b) {\n return $a[\"unix\"] - $b[\"unix\"];\n}\n\n\nAnd use with: usort($array, \"cmpByUnix\");\n\nLive example: 3v4l\n\nNotice you can also use asort($array); but this will compare also the \"random\" field and keep the key - if this what you need then look at Mangesh answer",
2019-04-29T17:44:17
Rakesh Jakhar :
\narray_multisort() — Sort multiple or multi-dimensional arrays\narray_columns() — Return the values from a single column in the input array\n\nYou can use array_multisort() and array_column(), then provide your desired sort order (SORT_ASC or SORT_DESC).\narray_multisort(array_column($array, "unix"), SORT_ASC, $array);\n\nExplanation:\nIn array_multisort(), arrays are sorted by the first array given. You can see we are using array_column($array, "unix"), which means that the second parameter is the order of sorting (ascending or descending) and the third parameter is the original array.\nThis is the result of array_column($array, "unix"):\nArray(\n [0] => 1556547761\n [1] => 1556547761\n [2] => 1556547765\n [3] => 1556547769\n)\n",
2019-04-29T17:49:53