Intro to PHP: String Operators & Constants
String Operators are used to modify strings.
At the bottom of this page there is a code editor pre-loaded with the lesson's code.
// Define variable
$gameDev = "Scott";
// Add to the variable
$gameDev .= " Cawthon";
// Print the variable
echo $gameDev;
➼ $gameDev = "Scott";
➼ $gameDev .= " Cawthon";
➼ echo $gameDev;
Output: Scott Cawthon
// Define $character
$character = "Character: ";
// Define $chosenCar
$chosenChar = $Character . "Freddy";
// Print the message
echo $chosenChar;
➼ $character = "Character: ";
$character is a variable containing a string value. The value of $character is "Character: "
➼ $chosenChar = $character. "Freddy";
$chosenChar is a string variable. It's value is equal to $CHARACTER plus "Freddy"
➼ echo $chosenChar;
This will print the value of $chosenCar
Output: Character: Freddy
PHP_EOL will insert a line break
// Define variables
$numStars = "5";
$gameTitle = "FNAF World";
// Print
echo $gameTitle.PHP_EOL;
echo "gets $numStars stars!";
➼ $numStars = "5";
$numStars is a variable containing an integer value. It is intialized at 5.
➼ $gameTitle = "FNAF World";
$gameTitle is a string variable intialized at "FNAF World"
➼ echo $gameTitle.PHP_EOL;
will print the value of $gameTitle and insert a line break.
➼ echo "gets $numStars stars!";
will print "gets", the value of $numStars, then "stars!"
Output: FNAF World
gets 5 stars!
Background:
You live on post apocalyptic Earth. Aliens called "Bugs" have taken over the planet. As a resistance figher, and web developer,
your job is to code warning messages.
Assignment:
Read each description. Use PHP to print the appropriate warning message.
Variables used for messages:
// Number of bugs in the settlement
$bugsDetected = 0;
// Number of shots fired
$shotsFired = 0;
// Number of bombs detected
$bombsDetected = 0;
// string variable containing any weather alters
$weather = "";
Example:
There are currently 5 bugs detected in the settlement. No shots have been fired. One bomb is detected.
// Define variables
$bugsDetected = 5;
$shotsFired = 0;
$bombsDetected = 1;
// Create Message
$alert = "There have been $bugsDetected bugs detected in our settlement. ";
$alert .= "$shotsFired shots have been fired. ";
$alert .= "$bombsDetected bombs have been detected in our settlement.";
// Print Message
echo $alert;
Message Descriptions:
1) There are 10 bugs detected in the settlement. No shots have been fired. Two bombs are detected. There is a 90%
chance of severe thunder storms.
2) There are 10 bugs dectected. 5 shots fired. 2 bombs detected.
3) There are no bugs, shots or bombs detected. There is a hurricane warning. This category 3 hurricane is projected to hit land tomorrow at 3pm.
Once you finish the assignment, play around with variable values and your echo statements in the code editor box below.
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