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解答例

PHP

<?php
header("Content-type: text/html; charset=utf-8");

$data = "PHP:Hypertext Preprocessor";

echo strtr($data, "p", "*") . "<br>";
echo str_replace("p", "*", $data) . "<br><br>";

echo strtr($data, "p", "***") . "<br>";
echo str_replace("p", "***", $data) . "<br><br>";

echo strtr($data, "PHP", "*") . "<br>";
echo str_replace("PHP", "*", $data) . "<br><br>";
?>

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