Basic PHP Tutorial 4: Variables and Comments

TL;DR

This PHP tutorial covers the basics of comments, variables, and string concatenation, including single and multi-line comments, variable assignment and usage, and concatenating variables with strings.

Transcript

hello and welcome to the fourth PHP tutorial in this tutorial we're going to be talking a little bit on comments variables and just a little bit on like string concatenation as it's called but mostly how do you put variables with on into a string basically so with that let's hop right on into it the first thing is commenting there's two ways to com... Read More

Key Insights

• 🫥 Comments in PHP can be single-line using "//" or multi-line using "/* */".
• 💲 Variables in PHP start with a dollar sign ($) and can include letters and underscores.
• ❓ Concatenating variables with strings in PHP requires using the "." (period) operator.
• ❓ Echo statements in PHP can be used to display the values of variables.
• ❓ Proper spacing and formatting can enhance the readability of echoed strings.
• 👾 Variable names in PHP cannot start with spaces or numbers.
• 🫥 Multi-line comments are useful for longer explanations or lists.

Questions & Answers

Q: What are the two ways to add comments in PHP?

In PHP, you can add comments using "//" for single-line comments and "/* */" for multi-line comments. Single-line comments are used for short comments, while multi-line comments are useful for longer explanations or lists.

Q: How do you define a variable in PHP?

Variable definition in PHP starts with a dollar sign ($) followed by the variable name, which can include letters (upper/lowercase) and underscores. Variables cannot start with a space or a number.

Q: How do you concatenate variables with strings in PHP?

In PHP, you can concatenate variables with strings using the "." (period) operator. To concatenate a variable "name" with a string, you can use "echo 'Hello '.$name;" or "echo "Hello $name";".

Q: Can you demonstrate an example of echoing out variables in PHP?

Sure! Let's say we have two variables, $name = "Harrison" and $age = 19. You can echo them out as: "echo 'Hello, '.$name.'! Your age is '.$age.' years old';" This will output: "Hello, Harrison! Your age is 19 years old."

Summary & Key Takeaways

• The tutorial explains the two ways to add comments in PHP - single-line comments using "//" and multi-line comments using "/* */".

• It covers the definition and assignment of variables in PHP, including rules for variable names and how to assign values to variables.

• The tutorial also demonstrates how to concatenate variables with strings using the "." operator in PHP echo statements.