Logic dictates. PHP Logical operators are pretty simple if you’ve taken Boolean Algebra or are familiar with logic-gates. You might have even been exposed to logic in Philosophy. If you’re not familiar with logic, this may be a bit of a shock for you. Only joking. It’s just another operator in our disposal that evaluates to either true or false. We looked at how to test whether an expression is true or not, but how can we test whether multiple expressions are true? With logical operators, that’s how. There are a few operators in PHP that test the truth value
Category: Programming
But I don’t wanna Decrement. PHP increment and decrement operators: these are operators that either add 1 or subtract 1 from the current value. The operators can be prefixed or post-fixed and will yield slightly different results each time. Increment Operator: ++ Decrement Operator: — Normally, to add 1 to a value, you would use the addition operator. <?php $a = 5; $a = $a + 1; var_dump($a); ?> In the example above, you evaluate the expression on the right, $a + 1, which becomes 6, and then you assign the value back to $a, on the
So You Want to Compare Stuff? PHP Comparison Operators, or relational operators, test some type of relation between two values. We’ve seen a few comparison operators in math, such as greater-than and less-than; in PHP, we have a few more comparison operators at our disposal. The relational operators that we’re going to be looking at are: Greater-than: > Greater-than-or-equal-to: ≥ Less-than: < Less-than-or-equal-to: ≤ Equal-to: == Identical-to: === Not-equal-to: != or <> Not-identical-to: !== Spaceship operator: <=> The comparison operator, whichever one you choose, will evaluate to either true or false. If we say, 3 > 2, what we’re
What’s Arithmetic? Arithmetic deals with the study of numbers, especially with operations on those numbers, such as addition, subtraction, multiplication, and division. In mathematics, those operations are called arithmetic operations. Arithmetic operators are then the operators that are used in arithmetic operations. In PHP, we have a few arithmetic operators. They include: addition, subtraction, multiplication, division, modulus, and exponential operators. Let’s just run through the basic ones first. I mean, after all, it is just basic math. <?php $a = 2 + 2; // $a = 4 $b = 5 – 3; // $b = 2 $c = $a
What do you mean assignment? I thought I was out of school. The assignment operator (=) assigns the value, or expression, to the variable; and yes, it’s different from the equality comparison operator (==). This is one of the most commonly made mistakes for beginner programmers: using the assignment operator when a comparison operator is required. The following syntax is required for the PHP assignment operator: $variable = value (or expression) The assignment takes the expression on the right and assigns it to the variable on the left. <?php // Assign a value to a variable $best_php_tutorial_youtuber
Being a software developer is great. Everyone wants to get in and as long as you call yourself a software developer you’re likely to get a high-paying job quickly. Software Developers have the leisure of not applying for jobs anymore. Recruiters are reaching out to them daily. The average length that a developer stays at a job has shrunk drastically. After all, why wait for a 3% raise when you can change jobs and negotiate a 20% increase? Developers have become spoiled in that sense. Nobody even cares that they’ve worked for 20 different companies in the last 5 years.
We’re starting to be consistent. PHP Constants are similar to variables except that they cannot change. They can’t change since constants are stored in the read-only-data segment. Why would you not want to keep data constant? A good example is when you want to store database connection information. You do not want to accidentally change the connection information somewhere later in your code and accidentally sever the database connection. How do we define constants in our code? With the define function. define() accepts two arguments: The first argument is the constant name. The second argument is the constant value.
It doesn’t matter which degree you’re pursuing, the last thing that you want to happen is to feel like you wasted your money. How do you succeed in a Computer Science program? What is the optimal approach that you should take so that when you graduate with your B.S. in Computer Science, you’ll be ready for the workforce? I’ve gone through it and will share what worked for me when it comes to Computer Science Success. Hopefully these tips will work for you also. Proper Notes As easy as you may believe that taking notes is, it’s not as intuitive
Variable Variables? Was that a typo? Variable variables: no that’s not a typo. That’s what this topic is about. PHP variable variables are dynamic variables, meaning that you can generate variable names dynamically in PHP. How is this done? If you prepend a dollar sign to a string, the string will then become a variable. Let’s create a regular variable $a. The variable $a will contain the string “bear.” We’ll then create another variable, and this time we’ll add an additional dollar sign before it. We’ll call the new variable variable $$a. <?php $a = “bear”; $$a = “cow”;
More Math? x + 3 = 5 Kind of Variables? I wrote about variables in the PHP Variables Intro article, but I’m going to dedicate the next two articles explaining variables even further. Three articles on variables? Yes. There’s that much material that needs to be covered. Recap: In PHP, variables start with a dollar sign, followed by either the underscore or a letter, followed by a series of letters, numbers, and/or underscores. They are case sensitive, so $awesome, $Awesome, $aWesome, and $AWesome are all different variables. PHP allows you to assign a value to a variable and then reassign