Question

How to use sort functions to sort an array in PHP

Answer 1

$arr = array("ccc", "aaaaaaaaaaaaaaa", "ddddddd", "b");

sort($arr);

print_r($arr);

 
/*
run:
 
Array ( [0] => aaaaaaaaaaaaaaa [1] => b [2] => ccc [3] => ddddddd ) 
 
*/

 

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Answer 2

$arr = array(7, 3, 1, 2, 4);

sort($arr);

print_r($arr);

 
/*
run:
 
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 7 ) 
 
*/

 

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Answer 3

$arr = array(7, 3, 1, 2, 4);

rsort($arr);

print_r($arr);

 
/*
run:
 
Array ( [0] => 7 [1] => 4 [2] => 3 [3] => 2 [4] => 1 ) 
 
*/

 

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Answer 4

$arr = array("ccc", "aaaaaaaaaaaaaaa", "ddddddd", "b");

rsort($arr);

print_r($arr);

 
/*
run:
 
Array ( [0] => ddddddd [1] => ccc [2] => b [3] => aaaaaaaaaaaaaaa ) 
 
*/

 

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Answer 5

$arr = array("C"=>"95", "C++"=>"85", "PHP"=>"75");

asort($arr); // Ascending Order by Value

print_r($arr);

 
/*
run:
 
Array ( [PHP] => 75 [C++] => 85 [C] => 95 ) 
 
*/

 

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Answer 6

$arr = array("C"=>"95", "C++"=>"85", "PHP"=>"75");

ksort($arr); // Ascending Order by Key 

print_r($arr);

 
/*
run:
 
Array ( [C] => 95 [C++] => 85 [PHP] => 75 ) 
 
*/

 

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Answer 7

$arr = array("C"=>"95", "C++"=>"85", "PHP"=>"75");

arsort($arr); // Descending Order by Value 

print_r($arr);

 
/*
run:
 
Array ( [C] => 95 [C++] => 85 [PHP] => 75 )
 
*/

 

70+ SQL courses for beginners and professionals

Answer 8

$arr = array("C"=>"95", "C++"=>"85", "PHP"=>"75");

krsort($arr); // Descending Order by Key 

print_r($arr);

 
/*
run:
 
Array ( [PHP] => 75 [C++] => 85 [C] => 95 ) 
 
*/

 

70+ SQL courses for beginners and professionals