To count the total number of characters in the given string.

we will use **count_chars() funtion **

count_chars — Return information about characters used in a string

## Return Values

Depending on `mode`**count_chars()** returns one of the following:

- 0 – an array with the byte-value as key and the frequency of every byte as value.
- 1 – same as 0 but only byte-values with a frequency greater than zero are listed.
- 2 – same as 0 but only byte-values with a frequency equal to zero are listed.
- 3 – a string containing all used byte-values cheapest is returned.
- 4 – a string containing all not used byte-values is returned.

- <html>
- <body>
- <?php
- $data = “Two Ts and one F.”;
- foreach (count_chars($data, 1) as $i => $val) {
- echo “There were $val instance(s) of \”” , chr($i) , “\” in the string.\n”;
- }
- ?>
- </body>
- </html>

The above example will output:

There were 4 instance(s) of " " in the string. There were 1 instance(s) of "." in the string. There were 1 instance(s) of "F" in the string. There were 2 instance(s) of "T" in the string. There were 1 instance(s) of "a" in the string. There were 1 instance(s) of "d" in the string. There were 1 instance(s) of "e" in the string. There were 2 instance(s) of "n" in the string. There were 2 instance(s) of "o" in the string. There were 1 instance(s) of "s" in the string. There were 1 instance(s) of "w" in the string.