Definition
The count_chars() function returns information about characters used in a string (for example, how many times an ASCII character occurs in a string, or which characters that have been used or not been used in a string).
Syntax
count_chars(string, mode)
Parameters
| Parameter | Description |
|---|---|
string |
Required. The string to be checked. |
mode |
Optional. Specifies the return modes. 0 is default. The different return modes are:0 - an array with the ASCII value as key and number of occurrences as value1 - an array with the ASCII value as key and number of occurrences as value, only lists occurrences greater than zero2 - an array with the ASCII value as key and number of occurrences as value, only lists occurrences equal to zero are listed3 - a string with all the different characters used4 - a string with all the unused characters |
Example
<?php
$mystr = "Hello World!";
echo count_chars($mystr, 3);