V.Shakya Software Developer & Consultant 
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The elements in an array can be sorted in alphabetical or numerical order, descending or ascending.
PHP – Sort Functions For Arrays
In this chapter, we will go through the following PHP array sort functions:
sort() – sort arrays in ascending order
rsort() – sort arrays in descending order
asort() – sort associative arrays in ascending order, according to the value
ksort() – sort associative arrays in ascending order, according to the key
arsort() – sort associative arrays in descending order, according to the value
krsort() – sort associative arrays in descending order, according to the key
Sort Array in Ascending Order – sort()
The following example sorts the elements of the $cars array in ascending alphabetical order:
Example
<?php
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$cars=array("Volvo","BMW","Toyota"); |
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sort($cars); |
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?>
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The following example sorts the elements of the $numbers array in ascending numerical order:
Example
<?php
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$numbers=array(4,6,2,22,11); |
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sort($numbers); |
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?>
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Sort Array in Descending Order – rsort()
The following example sorts the elements of the $cars array in descending alphabetical order:
Example
<?php
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$cars=array("Volvo","BMW","Toyota"); |
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rsort($cars); |
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?>
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The following example sorts the elements of the $numbers array in descending numerical order:
Example
<?php
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$numbers=array(4,6,2,22,11); |
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rsort($numbers); |
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?>
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Sort Array in Ascending Order, According to Value – asort()
The following example sorts an associative array in ascending order, according to the value:
Example
<?php
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$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43"); |
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asort($age); |
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?>
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Sort Array in Ascending Order, According to Key – ksort()
The following example sorts an associative array in ascending order, according to the key:
Example
<?php
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$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43"); |
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ksort($age); |
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?>
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Sort Array in Descending Order, According to Value – arsort()
The following example sorts an associative array in descending order, according to the value:
Example
<?php
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$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43"); |
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arsort($age); |
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?>
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Sort Array in Descending Order, According to Key – krsort()
The following example sorts an associative array in descending order, according to the key:
Example
<?php
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$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43"); |
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krsort($age); |
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?>
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