Functions for Sorting Arrays : Array sort « Data Structure « PHP






  1. PHP
  2. Data Structure
  3. Array sort

Functions for Sorting Arrays

 
FUNCTION          SORT BY             REVERSE SORT                MAINTAIN KEY/VALUE CORRELATION

sort              Value               No                          No

rsort             Value               Yes                         No

asort             Value               No                          Yes

arsort            Value               Yes                         Yes

ksort             Key                 No                          Yes

krsort            Key                 Yes                         Yes

usort             Value               User-defined                No

uasort            Value               User-defined                Yes

uksort            Key                 User-defined                Yes

    
   
   

<?php 
    $nums = array(15, 2.2, -4, 2.3, 10); 
    sort($nums); 
    printf("<pre>%s</pre>\n", var_export($nums, TRUE)); 
    $words = array('bird', 'fish', 'George', 'Aden'); 
    sort($words); 
    printf("<pre>%s</pre>\n", var_export($words, TRUE)); 
    $dogs = array('A' => 'C', 'B' => 'D', 'X' => 'Z', 'Q' => 'T'); 
    sort($dogs); 
    printf("<pre>%s</pre>\n", var_export($dogs, TRUE)); 
?>








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4.asort () function retains the array's keys in the original state
5.To reverse sort an enumerated array, use the rsort () function
6.Using the sort () Function
7.Using usort() to Sort a Multidimensional Array by One of Its Fields
8.Using uasort() to Sort a Multdimensional Associative Array by One of Its Fields
9.Using uksort() to Sort an Associative Array by the Length of Its Keys
10.Bubble Sort Variation
11.Sorting with sort()
12.Insertion Sort
13.Pass a second parameter to the sort functions to specify how you want the values sorted
14.Shell Sort
15.Sort an array in reverse order and maintain index association
16.Sorting Multiple Arrays
17.Sorting an Array by Its Keys
18.Sorting an Array by Its Values
19.Use asort() to sort by population.
20.Use ksort() to sort by city name.
21.Using sort to alphabetize
22.array multisort
23.date sort
24.krsort( ) function reverse sorts it by its keys while preserving the values
25.krsort() function: the key values are sorted in reverse order.
26.ksort( ) function sorts array by its keys while preserving the values
27.ksort() function sorts an array according to its key values, maintaining the original index association.
28.sort.php
29.sort() function sorts array elements from lowest to highest value.