I have an exercise I don’t know how to solve, because I am a beginner in php, here is the exercise summary:
the "str_split" function allows you to convert a character string into an array (if we have a $s string that we want to store in a $tab array, we will write "$ tab = str_split ($ s);". using this function, create a function which takes as parameter a character string and display the number of occurrences of each letter in this string.
<html>
<head>
<title>order</title>
</head>
<body>
<?php
function stringFunction($s) {
$tab = array();
$counter = 0;
$tab = str_split($s);
$count = count($tab);
for ($i = 0; $i < $count; $i++) {
for ($j = 0; $j < $count; $j++) {
if($tab[$i]==$tab[$j]){
$counter = $counter + 1;
}
}
}
return $counter;
}
echo stringFunction("aakkaaaall");
?>
</body>
</html>
Advertisement
Answer
Something like below should work?
<?php
function stringFunction($s) {
$tab = array();
$tab = str_split($s);
$occurrences = array_fill(0, 26, 0);
for ($i = 0; $i < count($tab); $i++) {
$occurrences[(ord($tab[$i])-ord('a'))]++;
}
for ($i = 0; $i < count($occurrences); $i++) {
if($occurrences[$i] != 0) {
echo(chr(ord('a')+$i) . " = " . $occurrences[$i]."n");
}
}
}
echo stringFunction("aajib");
?>