What is the method for sorting array elements in php

Array_multisort(), asort(), arsort(), krsort(), ksort(), natcasesort(), natsort(), rsort(), shuffle(), sort(), etc. can be used in PHP Function sorts array elements.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

PHP has some functions for sorting arrays Functions:

The main differences are:

• Some functions sort based on the keys of the array, while others sort based on the values: $array[' key'] = 'value';.

• Whether the association between keys and values ​​can be maintained after sorting, means that after sorting, the keys of the array may be reset to numeric types (0,1,2.. .).

• The sorting order is: alphabetical order, from low to high (ascending order), from high to low (descending order), numerical sorting, natural sorting, random order or user-defined sorting .

• Note: All the following sorting functions act directly on the array itself, rather than returning a new ordered array.

• The following functions have undefined order for equal elements in the array after sorting. (That is, the order between equal elements is unstable).

ValueThe key value association is maintained, the numeric type is not maintainedThe first array or specified by the optionThe value is from low to highThe value is from high to low Key is from high to low keyisfrom low to highvalueisNatural sorting, case insensitiveThe value is Natural sortValueNofrom high to lowValueNoRandomValueNofrom low to highThe value is defined by the userKeys are defined by the user##usort()Recommended learning: "

Sort function attributes

Function (method) name	Sort by	Array index keys maintain	sorted order
##array_multisort()
asort( )
arsort()
krsort()
ksort()
natcasesort()
natsort()
rsort()
shuffle()
sort()
uasort()
uksort()
Value	No	Defined by user

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