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1.4. Processing a String One Character at a Time

1.4.2. Solution

Loop through each character in the string with for. This example counts the vowels in a string:

$string = "This weekend, I'm going shopping for a pet chicken.";
$vowels = 0;
for ($i = 0, $j = strlen($string); $i < $j; $i++) {
    if (strstr('aeiouAEIOU',$string[$i])) {
        $vowels++;
    }
}


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