count_chars

(PHP 4 , PHP 5)

count_chars --  Return information about characters used in a string

Description

mixed count_chars ( string string [, int mode])

Counts the number of occurrences of every byte-value (0..255) in string and returns it in various ways. The optional parameter mode default to 0. Depending on mode count_chars() returns one of the following:

Example 1. count_chars() example

<?php

$data
= "Two Ts and one F.";

$result = count_chars($data, 0);

for (
$i=0; $i < count($result); $i++) {
   if (
$result[$i] != 0)
       echo
"There were $result[$i] instance(s) of \"" , chr($i) , "\" in the string.\n";
}

?>

This 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.

See also strpos() and substr_count().


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