You need to process each byte in a string individually.
Use the for loop to iterate through each byte in the string.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="EN" lang="EN">
<head>
<title>PHP</title>
<meta Name="Author" Content="Hann So">
</head>
<body>
<p>
<?php
$string = "This weekend, I'm going shopping for a new clothe.";
$vowels = 0;
for ($i = 0, $j = strlen($string); $i < $j; $i++) {
// find the occurence of a byte
if (strstr('aeiouAEIOU', $string[$i])) {
$vowels++;
}
}
echo $string, "<br />";
echo "Number of vowels found: $vowels<br />";
?>
</p>
</body>
</html>
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