PHP sort() Function

bool sort($array, sorting_type)

1. $array - The parameter specifies the array which we want to sort. It is a mandatory parameter
2. sorting_type - This is an optional parameter. There are 6 sorting types which are described below:
   • SORT_REGULAR - When we pass 0 or SORT_REGULAR in the sorting_type parameter, the items in the array are compared normally.
   • SORT_NUMERIC - When we pass 1 or SORT_NUMERIC in the sorting_type parameter, the items in the array are compared numerically
   • SORT_STRING - When we pass 2 or SORT_STRING in the sorting_type parameter, the items in the array are compared string-wise
   • SORT_LOCALE_STRING - When we pass 3 or SORT_LOCALE_STRING in the sorting_type parameter, the items in the array are compared as string based on current locale
   • SORT_NATURAL - When we pass 4 or SORT_NATURAL in the sorting_type parameter, the items in the array are compared as string using natural ordering
   • SORT_FLAG_CASE - When we pass 5 or SORT_FLAG_CASE in the sorting_type parameter, the items in the array are compared as strings. The items are treated as case-insensitive and then compared. It can be used using | (bitwise operator) with SORT_NATURAL or SORT_STRING.

Input : $array = [3, 4, 1, 2] 
Output : 
Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
)

Input : $array = ["geeks2", "raj1", "striver3", "coding4"]
Output :
Array
(
    [0] => coding4
    [1] => geeks2
    [2] => raj1
    [3] => striver3
)

 <?php
// PHP program to demonstrate the use of sort() function

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

// sort function 
sort($array); 

// prints the sorted array 
print_r($array);
?>

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
)

 <?php
// PHP program to demonstrate the use of sort() function
// sorts the string case-sensitively 
$array = array("geeks", "Raj", "striver", "coding", "RAj");

// sort function, sorts the string case-sensitively 
sort($array, SORT_STRING); 

// prints the sorted array 
print_r($array);
?>

Array
(
    [0] => RAj
    [1] => Raj
    [2] => coding
    [3] => geeks
    [4] => striver
)

 <?php
// PHP program to demonstrate the use
// of sort() function sorts the string 
// case-insensitively 
$array = array("geeks", "Raj", "striver", "coding", "RAj");

// sort function, sorts the
// string case-insensitively 
sort($array, SORT_STRING | SORT_FLAG_CASE); 

// prints the sorted array 
print_r($array);
?>

Array
(
    [0] => coding
    [1] => geeks
    [2] => Raj
    [3] => RAj
    [4] => striver
)