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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
  1. <?php
  2. $cars = array("Volvo", "BMW", "Toyota");
  3. sort($cars);
  4. ?>
The following example sorts the elements of the $numbers array in ascending numerical order:
 
Example
  1. <?php
  2. $numbers = array(4, 6, 2, 22, 11);
  3. sort($numbers);
  4. ?>
 
Sort Array in Descending Order - rsort()
 
The following example sorts the elements of the $cars array in descending alphabetical order:
 
Example
  1. <?php
  2. $cars = array("Volvo", "BMW", "Toyota");
  3. rsort($cars);
  4. ?>
 
The following example sorts the elements of the $numbers array in descending numerical order:
 
Example
  1. <?php
  2. $numbers = array(4, 6, 2, 22, 11);
  3. rsort($numbers);
  4. ?>
 
Sort Array (Ascending Order), According to Value - asort()
 
The following example sorts an associative array in ascending order, according to the value:
 
Example
  1. <?php
  2. $age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
  3. asort($age);
  4. ?>
 
Sort Array (Ascending Order), According to Key - ksort()
 
The following example sorts an associative array in ascending order, according to the key:
 
Example
  1. <?php
  2. $age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
  3. ksort($age);
  4. ?>
 
Sort Array (Descending Order), According to Value - arsort()
 
The following example sorts an associative array in descending order, according to the value:
 
Example
  1. <?php
  2. $age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
  3. arsort($age);
  4. ?>
 
Sort Array (Descending Order), According to Key - krsort()
 
The following example sorts an associative array in descending order, according to the key:
 
Example
  1. <?php
  2. $age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
  3. krsort($age);
  4. ?>
 
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!
 


2016-12-10
586 views




 
     
 
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