We have string str and we need to find the string with all unique characters from the given string. All different characters should be printed in ascending order.
Examples:
Input : $str = "GeeksforGeeks"
Output : Gefkors
Explanation, the unique characters in the given
string $str in ascending order are G, e, f, k,
o, r and s
Input : $str = "Computer Science Portal"
Output : CPSaceilmnoprtu
Explanation, the unique characters in the given
string $str are C, P, S, a, c, ei, l, m, n, o,
p, r, t and u
The problem can be solved using PHP in built function for collecting all the unique characters used in the given string.The in built function used for the given problem is:
- count_chars():The in built function has parameter which contains return mode an integer type which are as such 0, 1, 2, 3, 4 in which return mode 3 returns the string of all different characters used in the given string in ascending order.
Note: The string is case-sensitive.
Example 1:
<?php
$str = "Geeksforgeeks" ;
$result = ( count_chars ( $str , 3));
echo ( $result );
?>
|
Example 2:
<?php
$str = "GeeksforGeeks" ;
$result = ( count_chars ( $str , 3));
echo ( $result );
?>
|
Example3:
<?php
$str = "Computer Science Portal" ;
$result = ( count_chars ( $str , 3));
echo ( $result );
?>
|