??      count.php     
<html>
<head>
<title>6.2??????????????</title>
</head>

<body>
<h3>6.2??????????????</h3>
<h4>[?]?50????????????count.php????</h4>
<?php

$tokuten = array(
52,29,58,98,100,91,27,51,92,85,61,90,75,14,12,95,61,90,47,12,94,7,15,14,95,61,97,59);

#50????????????????????

$count = 0;
foreach($tokuten as $t){
if($t >= 50) { #50???????
$count++;
}
}
echo "50????????????? $count ????\n";

?>
<br />
<hr />

<h4>[?]?50????????????[?]????</h4>
<?php
$tokuten = array(
52,29,58,98,100,91,27,51,92,85,61,90,75,14,12,95,61,90,47,12,94,7,15,14,95,61,97,59);

#50????????????????????
$sum = 0;
$count = 0;
foreach($tokuten as $t){
if($t >= 50) { #50???????
echo "?50???????????\$tokuten[$sum]???? $tokuten[$sum] ????<br />\n";
$count++;
}
$sum++;
}

echo "<br />\n";
echo "??50????????????? $count ?????\n";
?>
</body>
</html>