Question

How to find the number of occurrences (frequency) of each character in a string with PHP

Answer 1

function character_occurrences($s) { 
    $TOTLAASCII = 256; 
    $arr = array_fill(0, $TOTLAASCII, NULL);
 
    $len = strlen($s); 
    
    for ($i = 0; $i < $len; $i++) {
        $arr[ord($s[$i])]++; 
    }
       
    for ($i = 1; $i < $TOTLAASCII; $i++) { 
        if ($arr[$i] > 0) {
            echo chr($i) . " - " . $arr[$i] . "\n";
        }
    } 
} 
     
$s = "javac++phpcpythonc#"; 
         
character_occurrences($s); 




/*
run:

# - 1
+ - 2
a - 2
c - 3
h - 2
j - 1
n - 1
o - 1
p - 3
t - 1
v - 1
y - 1

*/

 

70+ SQL courses for beginners and professionals