Question

How to print the use of different characters (letters) in a string in PHP

Answer 1

$str = "php programming language";
$count = 0;
$strsize = strlen($str);

for ($ch = 'a'; $ch <= 'z'; $ch++) {
    for ($i = 0; $i < $strsize; $i++) {
        if ($ch == $str[$i]) {
            echo $ch . " ";
            $count++;
            break;
        }
    }
}

echo "\nTotal number of different characters are: " . $count;



/*
run

a e g h i l m n o p r u 
Total number of different characters are: 12

*/

 

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Answer 2

$str = "php programming language";

//  count_chars(string $string, int $mode = 0): array|string
//  3 - a string containing all unique characters is returned

$result = count_chars($str, 3); 
  
echo $result; 



/*
run

aeghilmnopru

*/

 

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