Logo

PHP rsort() Function

PHP rsort() Function

The rsort () function in PHP is used to sort an array in reverse order i.e., highest to lowest.

Syntax

rsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )

Parameter

array(required)- This parameter represents the input array.

sort_flags (optional)- This parameter is used to modify the behavior of the sort. The various possible values for sorting type flags are as follows:

  • SORT_REGULAR (default) – It is used to compare items normally (don't change types)
  • SORT_NUMERIC – This flag is used to compare the items numerically.
  • SORT_STRING – It compares the given items as strings.
  • SORT_LOCALE_STRING – This flag compares the items as strings, based on the current locale.
  • SORT_NATURAL – It is used to compare items as strings using "natural ordering" like natsort().
  • SORT_FLAG_CASE – It can be combined (bitwise OR) with SORT_STRING or SORT_NATURAL to sort the given strings case-insensitively

 Return

This parameter returns a Boolean value TRUE on success or FALSE on failure.

Example 1

"Reema",2=>"Varun",1=>"Joe",4=>"Ron",3=>"Jai");
//original array
echo("Original array: \n");
print_r($array);
//sorting the array from in reverse order from highest to lowest
rsort($array);
//printing the sorted array
echo("\nSorted array: \n");
print_r($array);
?>

Output

Original array: 
 Array
 (
     [5] => Reema
     [2] => Varun
     [1] => Joe
     [4] => Ron
     [3] => Jai
 ) 
 Sorted array: 
 Array
 (
     [0] => Varun
     [1] => Ron
     [2] => Reema
     [3] => Joe 
     [4] => Jai
 )

Example 2

"Reema", "Age"=>23,"Country"=>"India");
 //original array
 echo("Original array: \n");
 print_r($array);
 //sorting the array in reverse order
 rsort($array );
 //printing the sorted array 
 echo("\nSorted array without second parameter: \n");
 print_r($array);
 //sorting array with second parameter as SORT_STRING 
 rsort($array,SORT_STRING  );
 //printing the sorted array
 echo("\nSorted array with second parameter: \n"); 
 print_r($array);
 ?>

Output

Original array: 
 Array
 (
     [Name] => Reema
     [Age] => 23
     [Country] => India
 )
 Sorted array without second parameter:  
 Array
 (
     [0] => 23
     [1] => Reema
     [2] => India
 )
 Sorted array with second parameter:  
 Array
 (
     [0] => Reema
     [1] => India
     [2] => 23
 )

Example 3

 array(1 => "mango", 2 => "banana", 2 => "apple"),
     "numbers" => array(1, 2, 3, 4, 5, 6),
     "values"   => array("first", 5 => "second", "third")
 );
 //sorting the array in reverse order
 rsort($array);
 //printing the reversed array 
 print_r($array);
 ?>

Output

Array
 (
     [0] => Array
         (
             [0] => 1
             [1] => 2
             [2] => 3
             [3] => 4
             [4] => 5 
             [5] => 6
         )
     [1] => Array
         (
             [0] => first
             [5] => second
             [6] => third 
         )
     [2] => Array
         (
             [1] => mango
             [2] => apple
         )
 )

Related Topics

PHP array_shift() Function

PHP array_shift() Function The array_shift() in PHP shifts the first value of the array off. This function returns the same value after shortening the array by one element and moving everything. Syntax array_shift ( array &$array )  Parameter array(required)- This parameter represents the input array Return This function returns...

1 minute read.

PHP end() function

PHP end() function The end() function in PHP sets the internal pointer of an array to its last element. This function returns the value of the last element Syntax end ( array &$array )   Parameter array (required)– This parameter represents the input array. Return This function returns...

1 minute read.

PHP is_iterable() Function

The is_iterable() function in PHP verifies that the contents of the specified variable is an iterable value. Syntax is_iterable ( mixed $var ) var(required)- This parameter represents the value to check. Return This function returns a Boolean value TRUE if the parameter var is iterable, else it returns...

1 minute read.

PHP Forms

PHP form is used to take input from users, by using superglobals$_REQUEST, $_GET and $_POSTmethod. There are various request methods in PHP Get method Post method Put method Patch method Delete...

5 minutes read.

PHP strrchr() Function

PHP strrchr() Function The strrchr() function in PHP finds the last occurrence of a character in the specified string and returns the portion of haystack, which starts at the last occurrence of the needle and goes until the end of haystack....

1 minute read.

PHP array_unshift() Function

PHP array_unshift() Function The array_unshift () function in PHP prepends one or more elements to the beginning or front of an array. It returns the new number of elements in the array. Syntax array_unshift ( array &$array [, mixed $... ] ) Parameter array(required)- This array represents...

1 minute read.

PHP lcfirst() Function

PHP lcfirst() Function The lcfirst() function in PHP converts the first character of a string to lowercase if that character is alphabetic. Syntax lcfirst ( string $str ) Parameter str(required)- This parameter signifies the input string. Return This function returns a string with the...

1 minute read.

PHP array_udiff() Function

PHP array_udiff() Function The array_udiff() function in PHP calculates the difference of arrays by using a callback function for data comparison. Syntax array_udiff ( array $array1 , array $array2 [, array $... ], callable $value_compare_func ) Parameter array1(required)- This array represents the first input array. array2(required)- This array represents the second input array. array3….(optional)- It...

1 minute read.

PHP metaphone() Function

PHP metaphone() Function The metaphone() function in PHP calculates the metaphone key (representing how a string sounds or pronounced) of a string. This function is used to text search and text matching or spelling...

1 minute read.

PHP list() Function

PHP list() Function The list() function in PHP sorts an array by key while maintaining the keys. Syntax list ( mixed $var1 [, mixed $... ] ) Parameter var1(required)- This parameter accepts variables separated by spaces. …(optional)- This parameter accepts a list of variables separated...

1 minute read.

PHP Do While Loop

PHP do while loop is used to execute the code at least one time because condition is checked after executing the code. Syntax: do{ //code to be executed  }while(condition); Output <?php $n=1;  do{ echo "$n<br/>";  $n++;  }while($n<=5);  ?> Output 1 2 3 4 5 ← Prev Next →...

1 minute read.

PHP similar_text() Function

PHP similar_text() Function The similar_text() function in PHP calculates the similarity between two strings. Syntax similar_text ( string $first , string $second [, float &$percent ] ) Parameter first(required): This parameter represents the first string to be compared. second(required): This parameter represents the second string to be compared. percent(optional): This...

1 minute read.

PHP strstr() Function

PHP strstr() Function The strstr() function in PHP finds the first occurrence of a string. It returns part of the parameter haystack string starting from and including the first occurrence of needle to the end of the haystack parameter. This function is case-sensitive.  Syntax strstr ( string $haystack , mixed $needle [, bool $before_needle] )  Parameter  haystack(required)-...

2 minutes read.

PHP strcmp() Function

PHP strcmp() Function The strcmp() function in PHP compares two strings. It is a binary-safe case-sensitive string function. This function is similar to the strncmp() function, with the difference that you can specify the number of characters from each...

1 minute read.

PHP is_double() Function

The PHP is_double() function in PHP is used to  find whether the type of the specified variable is a float or not. It returns a Boolean value true if the parameter var is...

1 minute read.

PHP array_uintersect() Function

PHP array_uintersect() Function The array_uintersect() function in PHP calculates the intersection of arrays by comparing the data by a callback function. It returns an array containing all the values of the first input array that are...

2 minutes read.

PHP setlocale() Function

PHP setlocale() Function The setlocale() function in PHP sets locale information(language, monetary, time and, other information specific for a geographical area.) Syntax setlocale ( int $category , array $locale ) Parameter category(required)- This parameter specified a named constant specifying the category of the functions affected...

1 minute read.

PHP pos() Function

PHP pos() Function The pos() function in PHP returns the current element in an array which is initialized to the first element of the array. This function is an alias of current(). Syntax pos ( array...

1 minute read.

PHP str_rot13() Function

PHP str_rot13() Function The str_rot13() function in PHP performs the ROT13 encoding on a string and returns the resulting string. The ROT13 encoding is used to shift every letter by 13 places in the alphabet...

1 minute read.

PHP str_word_count() Function

PHP str_word_count() Function The str_word_count() function in PHP counts the number of words inside the string and returns the information about words used in a string. String str_word_count( string $string [, int $format [, string $charlist ]] ) Parameter string(required)- This parameter represents the input string. format(required)- This parameterspecifies the...

2 minutes read.