How do I count how many times each character occurs in a string?
And it's best to use the built in function rather than cobble together a function yourself, although it wouldn't be too hard to write.
Let the function count_chars() take the strain. Here we see how this nifty little function lets us effortly count how many times each character occurs within a string of text:
<?php
$mytext = "Always use a function";
$arrayofinfo = count_chars($mytext,1);
//this returns an array which we explore thus:
foreach($arrayofinfo as $key => $value) {
print "$key occurs $value times\n";
}
//this gives us the byte value of key so the data we get is like this: 32 occurs 3 times, so we need to pass through chr($key) to get this:
foreach($arrayofinfo as $key => $value) {
print "'" . chr($key) . "' occurs $value times\n";
}
?>
...we now get our desired output:
' ' occurs 3 times
'A' occurs 1 times
'a' occurs 2 times
'c' occurs 1 times
'e' occurs 1 times
'f' occurs 1 times
'i' occurs 1 times
'l' occurs 1 times
'n' occurs 2 times
'o' occurs 1 times
's' occurs 2 times
't' occurs 1 times
'u' occurs 2 times
'w' occurs 1 times
'y' occurs 1 times
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