bool.php

<?php
    // 論理演算子の確認
    // &, &&, AND, |, ||, OR, !, NOT
    echo "true & true = " . (true & true) . "<br>";
    echo "true & false = " . (true & false) . "<br>";
    echo "false & false = " . (false & false) . "<br>";

    echo "true && true = " . (true && true) . "<br>";
    echo "true && false = " . (true && false) . "<br>";
    echo "false && false = " . (false && false) . "<br>";

    echo "true | true = " . (true | true) . "<br>";
    echo "true | false = " . (true | false) . "<br>";
    echo "false | false = " . (false | false) . "<br>";

    echo "true || true = " . (true || true) . "<br>";
    echo "true || false = " . (true || false) . "<br>";
    echo "false || false = " . (false || false) . "<br>";

    echo "!true = " . (!true) . "<br>";
    echo "!false = " . (!false) . "<br>";

    echo "デバッグ用関数を使った表示<br>";
    var_dump(true);
    var_dump(false);
?>