array_multisort
(PHP 4 )
array_multisort -- Sort multiple or multi-dimensional arrays
Description
bool array_multisort ( array ar1 [, mixed arg [, mixed ...
[, array ...]]])
array_multisort() can be used to sort several arrays at
once or a multi-dimensional array according by one of more
dimensions. Associative (string) keys are maintained while
numerical keys are re-indexed.
The input arrays are treated as columns of a table to be
sorted by rows - this resembles the functionality of SQL
ORDER BY clause. The first array is the primary one to sort
by. The rows (values) in that array that compare the same
are sorted by the next input array, and so on.
The argument structure of this function is a bit unusual,
but flexible. The very first argument has to be an array.
Subsequently, each argument can be either an array or a
sorting flag from the following lists.
Sorting order flags:
SORT_ASC - sort in ascending order
SORT_DESC - sort in descending order
Sorting type flags:
SORT_REGULAR - compare items normally
SORT_NUMERIC - compare items numerically
SORT_STRING - compare items as strings
No two sorting flags of the same type can be specified after
each array. The sorting flags specified after an array argument
apply only to that array - they are reset to default SORT_ASC
and SORT_REGULAR before each new array argument.
Returns TRUE on success or FALSE on failure.
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