PHP asort() function
PHP asort() function
The asort() function in PHP is used to sort an array while maintaining the index association.
Syntax
asort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
array(required)- This parameter represents the input array to sort.
sort_flags (optional)- This parameter is used to modify the behavior of the sort. The various possible values for sorting type flags are as follows:
- SORT_REGULAR – It is used to compare items normally (don't change types)
- SORT_NUMERIC – This flag is used to compare the items numerically.
- SORT_STRING – It compares the given items as strings.
- SORT_LOCALE_STRING – This flag compares the items as strings, based on the current locale.
- SORT_NATURAL – It is used to compare items as strings using "natural ordering" like natsort().
- SORT_FLAG_CASE – It can be combined (bitwise OR) with SORT_STRING or SORT_NATURAL to sort the given strings case-insensitively
Return
This function returns a Boolean value TRUE on success or FALSE on failure.
Example 1
"Reema", "Age"=>"23","Country"=>"India"); //original array echo("Original array: \n"); print_r($array); //sorting the array while maintaining the index association asort($array); //printing the sorted array echo("\nSorted array: \n"); print_r($array); ?>
Output
Original array: Array ( [Name] => Reema [Age] => 23 [Country] => India ) Sorted array: Array ( [Age] => 23 [Country] => India [Name] => Reema )
Example 2
"Reema", "Age"=>23,"Country"=>"India"); //original array echo("Original array: \n"); print_r($array); //sorting the array while maintaining the index association asort($array ); //printing the sorted array echo("\nSorted array without second parameter: \n"); print_r($array); //sorting array with second parameter as SORT_STRING asort($array,SORT_STRING ); //printing the sorted array echo("\nSorted array with second parameter: \n"); print_r($array); ?>
Output
Original array: Array ( [Name] => Reema [Age] => 23 [Country] => India ) Sorted array without second parameter: Array ( [Country] => India [Name] => Reema [Age] => 23 ) Sorted array with second parameter: Array ( [Age] => 23 [Country] => India [Name] => Reema )
Example 3
"mango", 2 => "orange", 3 => "lichi", "apple"); //sorting the array asort($fruits); echo("Sorted Array: \n"); //printing the sorted values foreach ($fruits as $key => $val) { echo "$key = $val\n"; } ?>
Output
Sorted Array: 4 = apple 3 = lichi 1 = mango 2 = orange