Tag And comment
===> tag php
<?php ?>
<?php
//===> comment one line
// content comment
//===> comment multi line
/*
content comment
content comment
*/
Display
//===> show string
echo "content string";
//===> show integer
echo 21;
//===> show variabel
echo $variabel;
//===> mix variabel and string
echo "test ".$variabel." test2";
Array
here
Loop
//===> for
for ($i = 2; $i < 11; $i = $i + 2) {
echo $i;
}
output:
246810
//===> foreach
$sentence = array("Im ", "learning ", "PHP!");
foreach($sentence as $word) {
echo $word;
}
output:
Im learning PHP!
//===> while
$loopCond = true;
while ($loopCond){
echo "<p>The loop is running.<p>";
$loopCond = false;
}
output:
The loop is running.
//other example
$i=0;
while($i<5){
echo $i;
$i++;
}
output:
01234
//with other way
$i=0;
while($i<5):
echo $i;
$i++;
endwhile;
output:
01234
//===> do while
$loopCond = false;
do {
echo "<p>The loop ran even though the loop condition is false.</p>";
} while ($loopCond);
output:
The loop ran even though the loop condition is false.
Library
//===> length
$length = strlen("sayah");
echo $length;
output:
5
//===> partial, uppercase, lowercase
$myname = "Dark King";
$partial = substr($myname, 1, 3);
print $partial;
$uppercase = strtoupper($myname);
print $uppercase;
$lowercase = strtolower($myname);
print $lowercase;
output:
ark
DARK KING
dark king
//===> find position
$myname = "Dark King";
echo strpos($myname, "i");
output:
6
//===> round(pembulatan)
$round = round(M_PI);
print $round;
$round = round(M_PI, 3);
print $round;
output:
3
3.142
//===> rand(random number between)
print rand(1, 10);
$name = "Dark King";
echo $name[rand(0, strlen($name)-1)];
output:
4
n
//===> length string
$name = "Dark King";
echo strlen($name);
output:
9
Function
//===> play with function
function greetings($name){
echo "Greetings, " . $name . "!";
}
greetings("Dark King");
output:
Greetings, Dark King!
//===> class
// The code below creates the class
class Person {
// Creating some properties (variables tied to an object)
public $isAlive = true;
public $firstname;
public $lastname;
public $age;
// Assigning the values
public function __construct($firstname, $lastname, $age) {
$this->firstname = $firstname;
$this->lastname = $lastname;
$this->age = $age;
}
// Creating a method (function tied to an object)
public function greet() {
return "Hello, my name is " . $this->firstname . " " . $this->lastname . ". Nice to meet you! :-)";
}
}
// Creating a new person called "boring 12345", who is 12345 years old ;-)
$me = new Person('Dark', 'King', 12345);
// Printing out, what the greet method returns
echo $me->greet();
output:
Hello, my name is Dark King Nice to meet you!
//===> other example class
class Dog{
public $numLegs = 4;
public $name;
public function __construct($name){
$this->name = $name;
}
public function bark(){
return "Woof!";
}
public function greet(){
return "My name is ".$this->name;
}
}
$dog1 = new Dog("Barker");
$dog2 = new Dog("Amigo");
echo $dog1->bark();
echo $dog2->greet();
output:
Woof! My name is Amigo
//===> cheking class
class Person {
public $isAlive = true;
function __construct($name) {
$this->name = $name;
}
public function dance() {
return "I'm dancing!";
}
}
$me = new Person("Shane");
if (is_a($me, "Person")) {
echo "I'm a person, ";
}
if (property_exists($me, "name")) {
echo "I have a name, ";
}
if (method_exists($me, "dance")) {
echo "and I know how to dance!";
}
output:
I m a person, I have a name, and I know how to dance!
//===> cheking class
class Shape {
public $hasSides = true;
}
class Square extends Shape {
}
$square = new Square();
if (property_exists($square, 'hasSides')) {
echo "I have sides!";
}
output:
I have sides!
//===> overide class / extends
class Vehicle {
public function honk() {
return "HONK HONK!";
}
}
class Bicycle extends Vehicle {
public function honk() {
return "Beep beep!";
}
}
$bicycle = new Bicycle();
echo $bicycle->honk();
output:
Beep beep!
//===> call const
class Ninja extends Person {
const stealth = "MAXIMUM";
}
echo Ninja::stealth;
output:
MAXIMUM
//===> const
class King {
public static function proclaim() {
echo "A kingly proclamation!";
}
}
King::proclaim()
output:
A kingly proclamation!
