Sorting an Array by Keys in PHP

Q

How To Sort an Array by Keys in PHP?

✍: FYIcenter.com

A

Sorting an array by keys can be done by using the ksort() function. It will re-order all pairs of keys and values based on the alphanumeric order of the keys. Here is a PHP script on how to use ksort():

<?php
$mixed = array();
$mixed["Zero"] = "PHP";
$mixed[1] = "Perl";
$mixed["Two"] = "Java";
$mixed["3"] = "C+";
$mixed[""] = "Basic";
$mixed[] = "Pascal";
$mixed[] = "FORTRAN";
ksort($mixed);
print("Sorted by keys:\n");
print_r($mixed);
?>

This script will print:

Sorted by keys:
Array
(
    [] => Basic
    [Two] => Java
    [Zero] => PHP
    [1] => Perl
    [3] => C+
    [4] => Pascal
    [5] => FORTRAN
)

⇒ Sorting an Array by Values in PHP

⇐ Retrieving All Values from an Array in PHP

⇑ PHP Built-in Functions for Arrays

⇑⇑ PHP Tutorials

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Sorting an Array by Values in PHP
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Counting the Number of Values in an Array in PHP
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Sorting an Array by Keys in PHP
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How To Find a Specific Value in an Array in PHP? There are two functions can be used to test if a value is defined in an array or not: array_search($value, $array) - Returns the first key of the matching value in the array, if found. Otherwise, it returns false. in_array($value, $array) - Returns tr... 2017-01-21, ∼3037🔥, 0💬

Retrieving All Keys from an Array in PHP
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