$str = "Start Now!";
// Mode 3: returns a string with all unique characters used
$result = count_chars($str, 3); // mode 3
echo "Original string: \"$str\"\n";
echo "Unique characters (mode 3): \"$result\"\n";
// The character with ASCII codes
echo "\nCharacter breakdown:\n";
for ($i = 0; $i < strlen($result); $i++) {
$char = $result[$i];
echo "Character: '$char' | ASCII: " . ord($char) . "\n";
}
/*
run:
Original string: "Start Now!"
Unique characters (mode 3): " !NSaortw"
Character breakdown:
Character: ' ' | ASCII: 32
Character: '!' | ASCII: 33
Character: 'N' | ASCII: 78
Character: 'S' | ASCII: 83
Character: 'a' | ASCII: 97
Character: 'o' | ASCII: 111
Character: 'r' | ASCII: 114
Character: 't' | ASCII: 116
Character: 'w' | ASCII: 119
*/
