PHP - Esempio di operatori logici
Prova a seguire l'esempio per comprendere tutti gli operatori logici. Copia e incolla il seguente programma PHP nel file test.php e tienilo nella root dei documenti del tuo server PHP e sfoglialo usando qualsiasi browser.
<html>
<head>
<title>Logical Operators</title>
</head>
<body>
<?php
$a = 42;
$b = 0;
if( $a && $b ) {
echo "TEST1 : Both a and b are true<br/>";
}else{
echo "TEST1 : Either a or b is false<br/>";
}
if( $a and $b ) {
echo "TEST2 : Both a and b are true<br/>";
}else{
echo "TEST2 : Either a or b is false<br/>";
}
if( $a || $b ) {
echo "TEST3 : Either a or b is true<br/>";
}else{
echo "TEST3 : Both a and b are false<br/>";
}
if( $a or $b ) {
echo "TEST4 : Either a or b is true<br/>";
}else {
echo "TEST4 : Both a and b are false<br/>";
}
$a = 10;
$b = 20;
if( $a ) {
echo "TEST5 : a is true <br/>";
}else {
echo "TEST5 : a is false<br/>";
}
if( $b ) {
echo "TEST6 : b is true <br/>";
}else {
echo "TEST6 : b is false<br/>";
}
if( !$a ) {
echo "TEST7 : a is true <br/>";
}else {
echo "TEST7 : a is false<br/>";
}
if( !$b ) {
echo "TEST8 : b is true <br/>";
}else {
echo "TEST8 : b is false<br/>";
}
?>
</body>
</html>Questo produrrà il seguente risultato:
TEST1 : Either a or b is false
TEST2 : Either a or b is false
TEST3 : Either a or b is true
TEST4 : Either a or b is true
TEST5 : a is true
TEST6 : b is true
TEST7 : a is false
TEST8 : b is false