Kód:
<?php
# index.php
if (isset($_GET['premenna'])){
echo "Tu moze byt tvoj zelany kod";
} else {
echo "Ahoj, si na zlej adrese! :)";
}
?>
Keď to spustíš ako index.php tak ťa pošle preč, keď tam ale dáš index.php?premenna (toto stačí, nemusíš ju vypĺňať) alebo index.php?premenna=hodnota, vypíše tvoj želaný kód.
Treba poznať funkciu bool isset($var); a správanie sa superglobálnych polí ($_GET, $_POST, $_COOKIE atď).
A. S. Tanenbaum píše:
The terms LF, MF, and HF refer to low, medium, and high frequency, respectively. Clearly, when the names were assigned, nobody expected to go above 10 MHz, so the higher bands were later named the Very, Ultra, Super, Extremely, and Tremendously High Frequency bands. Beyond that there are no names, but Incredibly, Astonishingly, and Prodigiously high frequency (IHF, AHF, and PHF) would sound nice.
