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I have an array such as:
Array ( [DEF] => Array ( [0] => Array ( [type] => 1 [id] => 1212 [name] => Jane Doe [current] => 1 ) [1] => Array ( [type] => 1 [id] => 3123121 [name] => Door [current] => ) ) [ABC] => Array ( [0] => Array ( [type] => 1 [id] => 1234 [name] => John Doe [current] => ) ) [WW] => Array ( [0] => Array ( [type] => 1 [id] => 1212 [name] => Jane Doe [current] => 1 ) [1] => Array ( [type] => 1 [id] => 3123121 [name] => Door [current] => ) [2] => Array ( [type] => 1 [id] => 64646 [name] => Floor [current] => ) ) ) And I want to sort this array by number ( count() ) of inner-array items descending (i.e. most items first), so I will have this array:
Array ( [WW] => Array ( [0] => Array ( [type] => 1 [id] => 1212 [name] => Jane Doe [current] => 1 ) [1] => Array ( [type] => 1 [id] => 3123121 [name] => Door [current] => ) [2] => Array ( [type] => 1 [id] => 64646 [name] => Floor [current] => ) ) [DEF] => Array ( [0] => Array ( [type] => 1 [id] => 1212 [name] => Jane Doe [current] => 1 ) [1] => Array ( [type] => 1 [id] => 3123121 [name] => Door [current] => ) ) [ABC] => Array ( [0] => Array ( [type] => 1 [id] => 1234 [name] => John Doe [current] => ) ) ) Can anyone suggest an efficient way to do so? Thanks.
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Sorting a multidimensional array by element containing date. Use the usort() function to sort the array. The usort() function is PHP builtin function that sorts a given array using user-defined comparison function. This function assigns new integral keys starting from zero to array elements.
A two-dimensional or 2D array is a collection of columns and rows. Programmers can randomly access the 2D array elements or each cell individually by utilizing their indexes. With the help of sorting, array elements are arranged according to the requirements, whether in ascending or descending order.
array_multisort() can be used to sort several arrays at once, or a multi-dimensional array by one or more dimensions. Associative (string) keys will be maintained, but numeric keys will be re-indexed.
The usort() function is an inbuilt function in PHP which is used to sort the array of elements conditionally with a given comparator function. The usort() function can also be used to sort an array of objects by object field.
Using uksort:
uksort($array, function($a, $b) { return count($b) - count($a); }); Using array_multisort:
array_multisort(array_map('count', $array), SORT_DESC, $array); With PHP < 5.3:
function sort_cb($a, $b) { return count($b) - count($a); } uksort($array, 'sort_cb'); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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