count_chars – PHP String Functions

Syntax :

Description :

count_chars() function will return information about characters used in a string, which can be string with all different characters, with all unused characters and details of ASCII values as key and number of occurrences as a value etc. Please see mode parameter for more information

Parameter :

string –  String to be checked.

mode – This is Optional parameter, It defines the return mode. 0 is the default value. Here are the return modes values which can be used

• 0 – an array with the ASCII value as key and number of occurrences as value
• 1 – an array with the ASCII value as key and number of occurrences as value, only lists occurrences greater than zero
• 2 – an array with the ASCII value as key and number of occurrences as value, only lists occurrences equal to zero are listed
• 3 – a string with all the different characters used
• 4 – a string with all the unused characters

Output :

This will return information depending upon the mode passed Or for the default mode value which is 0 (zero).

Related articles : substr_count(), str_word_count(), strlen().

Count Chars PHP Example

<?php
$strExample = "Hi from tutorialmines.net!";
echo count_chars($strExample,3);
?>

In above example ,We have a string “Hi from tutorialmines.net!”. So, when we apply count_chars() function. This will a string with all the different characters used in it.

Now Output will become –

Count Chars PHP Function Example 2

<?php
$strExample = count_chars("Hi from tutorialmines.net",4);
echo($strExample);
?>

In above example ,We have a string “Hi from tutorialmines.net!”. So, when we apply count_chars() function. This will return a string with all the unused characters .

Output will be like below:

Count Chars PHP Example 3 :

In this example we will use count_chars() with mode 1 to check the string.

<?php
$str = "Hi from tutorialmines.net!";
print_r(count_chars($str,1));
?>

In above example ,We have a string “Hi from tutorialmines.net!”. So, when we apply count_chars() function. This will return an array with the ASCII value as key and how many times it occurred as value:  with all the unused characters .

Output will be like below:

Count Chars PHP Example 4 :

<?php
$str = "Hi from tutorialmines.net!";
$strArray = count_chars($str,1);
foreach ($strArray as $key=>$value)
{
echo "The character <b>'".chr($key)."'</b> was found $value time(s)<br>";
}
?>

In above example ,We have a string “Hi from tutorialmines.net!”. So, when we apply count_chars() function. This will return an array with the ASCII value as key and how many times it occurred as value: with all the unused characters .

Output will be like below: