PHP Programming
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PHP is a server scripting language, and a powerful tool for making dynamic and interactive Web pages. PHP is a widely-used, free, and efficient alternative to competitors such as NodeJs or Microsoft's ASP. #PHP #Tutorials #course Join Now! @php_tut
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Full Chat Application using #PHP with #MySQL & #Bootstrap5
https://youtu.be/JLnsWkQ-iB8
PHP Comments
Comments in PHP
A comment in PHP code is a line that is not executed as a part of the program. Its only purpose is to be read by someone who is looking at the code.
Comments can be used to:
💎Let others understand
your code
💎Remind yourself of what you did - Most programmers have experienced coming back to their own work a year or two later and having to re-figure out what they did. Comments can remind you of what you were thinking when you wrote the code.
📌PHP supports several ways of commenting:
#1 Syntax for single-line comments:
💎 using #
💎 using //
#2 Syntax for multiple-line comments:
💎 /* */
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Create an Array in PHP
In PHP, the array() function is used to create an array
------------------------------------
$names = array("Abas", "John", "Elias");
------------------------------------
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In PHP, there are three types of arrays:
#1. Indexed arrays - Arrays with a numeric index
#2. Associative arrays - Arrays with named keys
#3. Multidimensional arrays - Arrays containing one or more arrays.
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PHP Arrays
📌An array stores multiple values in one single variable.
What is an Array?
📌An array is a special variable, which can hold more than one value at a time.
If you have a list of items (a list of car names, for example), storing the cars in single variables could look like this:
----------------------------------
$cars1 = "Volvo";
$cars2 = "BMW";
$cars3 = "Toyota";
---------------------------------
However, what if you want to loop through the cars and find a specific one? And what if you had not 3 cars, but 300?
The solution is to create an array!
An array can hold many values under a single name, and you can access the values by referring to an index number.
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Multi User Role Based Login System
Using Bootstrap 5, PHP & MySQL
https://youtu.be/-8q3GLkr9Ts
📌 Above we declare a class named Fruit consisting
of two properties
📌$name
📌$color
and two methods
📎set_name()
📎get_name()
for setting and getting the $name property.
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Define a Class
A class is defined by using the class keyword, followed by the name of the class and a pair of curly braces ({}). All its properties and methods go inside the braces:
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OOP Case
Let's assume we have a class named Fruit. A Fruit can have properties like name, color, weight, etc. We can define variables like $name, $color, and $weight to hold the values of these properties.
When the individual objects (apple, banana, etc.) are created, they inherit all the properties and behaviors from the class, but each object will have different values for the properties.
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PHP - What are Classes and Objects?
Classes and objects are the two main aspects of object-oriented programming.
📌 A class is a template for objects, and an object is an instance of class.
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Object-oriented programming has several advantages over procedural programming:
OOP is faster and easier to executeOOP provides a clear structure for the programsOOP helps to keep the PHP code DRY "Don't Repeat Yourself", and makes the code easier to maintain, modify and debugOOP makes it possible to create full reusable applications with less code and shorter development time
📌 Tip: The "Don't Repeat Yourself" (DRY) principle is about reducing the repetition of code.
You should extract out the codes that are common for the application, and place them at a single place and reuse them instead of repeating it.
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