PHP
5 Sorting Arrays
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
$cars
= array("Volvo", "BMW", "Toyota");
sort($cars);
?>
The
following example sorts the elements of the $numbers array in ascending
numerical order:
Example
<?php
$numbers
= array(4, 6, 2, 22, 11);
sort($numbers);
?>
Sort Array
in Descending Order - rsort()
The
following example sorts the elements of the $cars array in descending
alphabetical order:
Example
<?php
$cars
= array("Volvo", "BMW", "Toyota");
rsort($cars);
?>
The
following example sorts the elements of the $numbers array in descending numerical
order:
Example
<?php
$numbers
= array(4, 6, 2, 22, 11);
rsort($numbers);
?>
Sort Array
(Ascending Order), According to Value - asort()
The
following example sorts an associative array in ascending order, according to
the value:
Example
<?php
$age
= array("Peter"=>"35",
"Ben"=>"37", "Joe"=>"43");
asort($age);
?>
Sort Array
(Ascending Order), According to Key - ksort()
The
following example sorts an associative array in ascending order, according to
the key:
Example
<?php
$age
= array("Peter"=>"35",
"Ben"=>"37", "Joe"=>"43");
ksort($age);
?>
Sort Array
(Descending Order), According to Value - arsort()
The
following example sorts an associative array in descending order, according to
the value:
Example
<?php
$age
= array("Peter"=>"35", "Ben"=>"37",
"Joe"=>"43");
arsort($age);
?>
Sort Array
(Descending Order), According to Key - krsort()
The
following example sorts an associative array in descending order, according to
the key:
Example
<?php
$age
= array("Peter"=>"35",
"Ben"=>"37", "Joe"=>"43");
krsort($age);
?>
Complete PHP
Array Reference
For a
complete reference of all array functions, go to our complete PHP Array
Reference.
The
reference contains a brief description, and examples of use, for each function!
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