PHP count_chars()function

PHP count_chars() is most important string function. It is used to return information about characters in a string.

count_chars(string,mode); 

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

<?php 
$str = "Hello World!";  
echo "Your given string: ".$str;  
echo "<br>"."By using 'count_chars()' function your string is :".count_chars($str,3);    
?>
        

<?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";  
}  
?>

<?php  
$str = "PHP is Lovely Language!";  
$strArray = count_chars($str,1);  
  
foreach ($strArray as $key=>$value)  
{  
   echo "The character <br>'".chr($key)."' <br> was found $value time(s) "<br>"; 
}  
>?