HTML tutorial
CSS3 tutorial
Bootstrap tutorial
JavaScript tutorial
JQuery tutorial
AngularJS tutorial
React tutorial
NodeJS tutorial
PHP tutorial
Python tutorial
Python3 tutorial
Django tutorial
Linux tutorial
Docker tutorial
Ruby tutorial
Java tutorial
C tutorial
C ++ tutorial
Perl tutorial
JSP tutorial
Lua tutorial
Scala tutorial
Go tutorial
ASP.NET tutorial
C # tutorial
PHP String Reference : Return a string with all the different characters used in "Hello World!" (mode 3): "
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).
Parameter | Description |
---|---|
string | Required. The string to be checked |
mode | Optional. Specifies the return modes. 0 is default. The different return modes are:
|
Return Value: | Depending on the specified mode parameter |
---|---|
PHP Version: | 4+ |
Return a string with all the unused characters in "Hello World!" (mode 4):
<?php
$str = "Hello World!";
echo count_chars($str,4);
?>
In this example we will use count_chars() with mode 1 to check the string. Mode 1 will return an array with the ASCII value as key and how many times it occurred as value:
<?php
$str = "Hello World!";
print_r(count_chars($str,1));
?>
Another example of counting how many times an ASCII character occurs in a string:
<?php
$str = "PHP is pretty fun!!";
$strArray = count_chars($str,1);
foreach ($strArray as $key=>$value)
{
echo "The character <b>'".chr($key)."'</b> was found $value time(s)<br>";
}
?>
❮ PHP String Reference