Belajar PHP Dasar | 2. Variable dalam PHP

Summary

In this video, the speaker expresses gratitude to supporters of Indonesian coders and encourages new viewers to subscribe. The tutorial explains how to create and print a variable in PHP, highlighting the basics of PHP syntax, including how to declare variables with a dollar sign and print them using `echo`. The speaker also touches on built-in PHP variables and the concept of server-side programming. The session concludes with a reminder of the importance of understanding PHP syntax and its foundational concepts, setting the stage for future lessons.

Takeaways

• 😀 The speaker expresses gratitude to their supporters and encourages new viewers to subscribe for useful content.
• 😀 The tutorial covers the basics of PHP, starting with how to create a variable and print it to the browser.
• 😀 PHP variables are declared using a dollar sign (`$`), and the data type does not need to be specified.
• 😀 Example of variable declaration: `$heroML = 'value';` for a string variable.
• 😀 To print variables to the browser, use the `echo` statement, which can handle both text and variables.
• 😀 Concatenation of strings and variables is done using a dot (`.`) operator, as shown in the example: `echo 'Hero: ' . $heroML;`.
• 😀 The PHP script can include HTML code outside PHP tags, which is executed as plain text.
• 😀 The speaker briefly mentions predefined PHP variables such as `$_POST`, `$_GET`, and others for handling server-side data.
• 😀 PHP scripts need to be wrapped in PHP tags (`<?php ... ?>`), otherwise, they are treated as regular text.
• 😀 The tutorial concludes with a reminder to continue learning PHP through future videos, and the speaker ends with a formal greeting: 'Assalamualaikum.'

Q & A

What is the purpose of the PHP opening tag <?php?

The PHP opening tag <?php indicates the beginning of a PHP code block. Any code within these tags is processed by the PHP compiler.

Do you need to declare data types when creating variables in PHP?

No, PHP is a loosely typed language, so you don't need to declare the data type of a variable when creating it. You can simply assign a value to a variable using a dollar sign ($), followed by the variable name.

How do you define a variable in PHP?

In PHP, you define a variable by using the dollar sign ($) followed by the variable name. For example: $heroML = 'Hello, world!';.

How do you concatenate variables and strings in PHP?

In PHP, you concatenate variables and strings using the dot (.) operator. For example, echo $heroML . ' ' . $damage; would combine the string stored in $heroML with the value of $damage.

What is the purpose of the echo statement in PHP?

The echo statement in PHP is used to output or display content to the browser. It can be used to display the value of variables, strings, and other content.

What will happen if PHP code is written outside of the PHP tags?

If PHP code is written outside of the PHP tags, it will not be processed by the PHP compiler and will instead be treated as plain text or HTML.

What are some examples of predefined PHP variables?

Examples of predefined PHP variables include $_SESSION (for session data), $_GET and $_POST (for retrieving form data), and $_FILES (for handling file uploads). These variables have special functions within PHP.

What does the dot (.) operator do in PHP?

The dot (.) operator in PHP is used for string concatenation. It combines two or more strings or variables into one string.

Why doesn't PHP require the declaration of data types for variables?

PHP is a dynamically typed language, meaning the type of a variable is determined at runtime based on the value it holds. This eliminates the need for explicit data type declarations.

Can you print multiple variables at once in PHP?

Yes, you can print multiple variables at once by concatenating them with the dot (.) operator in the echo statement. For example: echo $var1 . $var2 . $var3.