<?php
$true = TRUE;
$false = FALSE;
$a = $true && $true;
$b = $true && $false;
$c = $true && $true && $true;
$d = $true && $false&& $false;
$e = $true && ($true && $false);
var_dump($a,$b,$c,$d,$e); //論理積の演算
?>
<?php
$true = TRUE;
$false = FALSE;
$a = $true || $true;
$b = $true || $false;
$c = $true || $true || $true;
$d = $true || $false || $false;
$e = $true || ($true || $false);
$f = $false || $false;
var_dump($a,$b,$c,$d,$e,$f); //論理和の演算
?>
<?php
$true = TRUE;
$false = FALSE;
$a = !$true;
$b = !$false;
$c = !$true && !$true;
$d = !($true && $true);
var_dump($a,$b,$c,$d); //否定の演算
?>
