Awesome work! We’ve covered a lot of material in this lesson, so let’s review:
- Strings are collections of text that the computer treats as a single piece of data.
- A string can be any length and contain any letters, numbers, symbols, or spaces surrounded by quotation marks.
- In order to include certain characters inside strings we have to use escape sequences.
- An operator is a character that performs a task in our code.
- We can use the concatenation operator (
.) to combine two strings into one.
- Variables are a fundamental programming concept which allow us to easily reuse data in our code.
- We declare a variable using the dollar sign (
$) followed by the variable name and then use the assignment operator (
=) to give it a value.
- PHP has variable parsing which allows us to include variables directly in our strings.
- Once a variable has been assigned, we can change its value. This is called reassignment.
- We can create an alias for a variable, instead of just a copy, using the reference assignment operator (
- Operations to the right of the assignment operator will be evaluated before assignment takes place.
- The concatenating assignment operator (
.=) is a shorthand notation for reassigning a string variable to its current value appended with another string value.
If that was a lot to take in, don’t worry about memorizing everything right away. Remember that when you want to explore more about the language, the documentation is a great place to get comfortable exploring.