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PHP Tutorial
PHP INTRODUCTION
PHP Introduction – PHP is a powerful server-side scripting language for creating dynamic and interactive websites. PHP is a widely-used, free, and efficient alternative to competitors such as Microsoft’s ASP. PHP is perfectly suited for Web development and can be embedded directly into the HTML code. The PHP syntax is very similar to Perl and C. PHP is often used together with Apache (webserver) on various operating systems. It also supports ISAPI and can be used with Microsoft.
PHP SYNTAX
Visual Studio Code is a great editor for PHP development. You get features like syntax highlighting and bracket matching, IntelliSense (code completion), and snippets out of the box and you can add more functionality through community-created VS Code extensions. Linting. VS Code uses the official PHP linter (php -l) for PHP language diagnostics. This allows VS Code to stay current with PHP linter improvements.
PHP COMMENTS
Comments used to give brief documentation on Functions, Classes, and their Variables are blocked by phpDoc. Starting with /** and ending with */characters, this comment structure is common.
PHP VARIABLES
4195 is an example of a whole number without a decimal point. They are the most basic type. They correspond to both positive and negative whole numbers. Integers can be assigned to variables or utilised in expressions, as in the following example. The format of an integer might be decimal (base 10) or octal (base 8) or hexadecimal (base 16). The default is decimal format; octal numbers have a leading 0, while hexadecimals have a leading 0x. The biggest integer on most systems is (2**31. 1) (or 2,147,483,647), whereas the lowest (most negative) integer is. (2**31. 1) (or .2,147,483,647).
PHP ECHO PRINT
PHP echo and print statement Previous Next If there is an input then it must have an output. So in PHP also there is two statements which are used for displaying output data to the screen . echo; print; Both the statement are used for displaying data on the screen. Difference between 'echo' and 'print' echo print; This statement can pass multiple string separated by ','. It cannot pass.
PHP DATATYPES
A Data type is the classification of data into a category according to its attributes; 1. Alphanumeric characters are classified as strings 2. Whole numbers are classified integers 3. Numbers with decimal points are classified as floating points. 4. True or false values are classified as Boolean. PHP is a loosely typed language; it does not have explicit defined data types. PHP determines the data types by analyzing the attributes of data supplied. PHP implicitly supports the following data types 1. Integer – whole numbers e.g. -3, 0, 69. The maximum value of an integer is platform-dependent. On a 32 bit machine, it’s usually around 2 billion. 64 bit machines usually have larger values. The constant PHP_INT_MAX is used to determine the maximum value. Output: 1. Floating point number – decimal numbers e.g. 3.14. they are also known as double or real numbers. The maximum value of a float is platform-dependent. Floating point numbers are larger than integers.
PHP OPERATORS
How does run PHP script PHP operators? Operators PHP Language: A Php Language is a Special operator that is a mathematical operation performed in the Php language. Operator Can be used to solve the mathematical operation Perform logically. Operators have used variables and data calculation. Types of Operator in PHP. 1. Arithmetic Operator. 2. Relational Operator.
PHP CONSTANTS
Constants are either identifiers or simple names that can be assigned any fixed values. They are similar to a variable except that they can never be changed. They remain constant throughout the program and cannot be altered during execution. Once a constant is defined, it cannot be undefined or redefined. Constant identifiers should be written in upper case following the convention. By default, a constant is always case-sensitive, unless mentioned. A constant name must never start with a ...
PHP STRINGS
In PHP, we may make a string by surrounding the content in a single quotation mark.In PHP, it is the simplest method to define a string. Use a backslash () to signify a literal single quote, and double backslash () to specify a literal backslash (). (\\\\). All other backslash characters, such as r or, will be printed just as they are instead of having any special significance. As an example, For a better understanding of the single quoted PHP String, consider the following examples: 1st example output: In a single-quoted PHP string, we may hold several lines of text, special characters, and escape sequences.
PHP NUMBERS
PHP's prime number. Here's an example of a programme that lists the first 15 prime numbers.
PHP MATH
In mathematics, what are functions? A function is a relationship between a set of inputs and a set of permitted outputs in which each input corresponds to precisely one output. If A and B are two non-empty sets, then mapping from A to B is only a function if every element in set A has only one image in set B. It is another definition of functions.
PHP DATE TIME
The PHP date function is a built-in function that makes working with date data types much easier.
PHP IF ELSE STATEMENTS
As you can see from the above PHP example of an if-elseif-else statement, if the condition of the if statement evaluates to true, the content inside it will be executed, and all the next elseif and else statements will be skipped; if the condition of the if statement evaluates to false, the programme control will go to the elseif statement, and check if its condition evaluates to true, if yes, the content inside that elseif will be executed, and all the next else
PHP SWITCH STATEMENTS
In one crucial manner, the switch-case statement varies from the if-elseif-else statement.
PHP LOOPS
PHP Loops are a type of code that can help us run some code inside of the loop over and over again according to our requirement as the input, and these loops will help us run the code and complete the task as many times as we want in order to execute the same code inside of the loop until our condition becomes false or else the code runs continuously. The term itself indicates that it will be repeated, but only if a specific condition is met, which is specified.
PHP FUNCTIONS
IN PHP, many functions are used such as built-in functions and user-defined functions. Each and every function has its own functionality and properties. A function is a set of statements written in the program that can be used multiple times in the code anywhere needed. A function call is required to execute the statements written inside the function. It is a piece of code that takes one or more inputs as a parameter and processes it and returns a value.
PHP ARRAYS
Arrays are a sort of data structure in PHP that allows us to store numerous items of the same data type in a single variable, saving us the time and effort of having to create a new variable for each data type. The arrays are useful for creating a list of similar-type components that can be retrieved by their index or key. Let's say we wish to save five names and print them out. The usage of five distinct string variables makes this simple.
PHP SUPER GLOBAL VARIABLES
A static variable is a variable that only has a local scope. However, unlike a typical local variable, it is not deleted when the scope border is crossed. The'static' keyword can be used inside a function to declare a variable. When the programme execution crosses the scope barrier, a static variable retains its value. However, it can only be accessed from inside that confinement. Let me show you how to do that using the following sample code: The static is present in the above counter function.
PHP REGEX
Regular Expressions (abbreviated "regex" or "RegExp") are specifically designed text strings that are used to find patterns in text. Regular expressions are one of the most powerful tools for efficient and effective text processing and modification accessible today. It may be used to check whether the format of data supplied by the user (e.g., name, email, phone number, etc.) was accurate, find and replace matching strings within text content, and so on.
PHP INCLUDE REQUIRE
It is possible to insert the content of one PHP file into another PHP file (before the server executes it), with the include or require statement. The include and require statements are identical, except upon failure: 1. requirewill produce a fatal error (E_COMPILE_ERROR) and stop the script 2. includewill only produce a warning (E_WARNING) and the script will continue So, if you want the execution.
PHP FILE HANDLING
Banks, for example, would require software to help them generate reports such as bank account statements for three or six months, e-commerce companies would require reports related to stock inventory and sales, and stock market trading applications would require daily stock prices to be provided in the form of readable files. I'm sure you'd agree that any programme that supports a business function requires you to read or write data to a file in this case.
PHP FILE UPLOAD
In a text editor like Notepad, Notepad++, or any other, type the above file uploading form code.
PHP COOKIES
Cookie is set by PHP. A cookie is a text file that a website saves on a user's computer. This file includes information that the site may access on the user's next visit, allowing the site to "recognise" the user and give a more personalised set of services. Cookie security features are crucial. A cookie can only be read by the website that created it.
PHP SESSIONS
PHP Sessions. Sessions are an alternative to cookies. A session is usually a file or database record on the server side which contains the small pieces of data which the server wants to store for each user. Instead of sending key/value pairs to the browser, these values are stored on the server, and only a reference identifier ("session ID") is sent to the user's browser as a cookie.
PHP FILTERS
The PHP filter core module has been removed from core starting with version 8.x. The module adds the ability to include PHP code in posts. PHP is a general-purpose scripting language widely-used for web development; the content management system used by this website has been developed using PHP. Through the PHP filter, users with the proper permission may include custom PHP code within a page of the site. While this is a powerful and flexible feature if used by a trusted user with PHP.
php code to validate phone number
PHP CALLBACK FUNCTIONS
Callback functions are called by PHP whenever a certain event happens. For example, when parsing XML, PHP can call a function every time it hits a tag, and you can define your own user function for the purpose of being called by PHP, then pass the name of the function to PHP. Callback functions invariably have strict requirements on the number of parameters they can take, as very often PHP will want to pass variables to your callback function for you to use.
PHP EXCEPTIONS
While errors were the main construct to do so in PHP 4, exceptions have been around since PHP 5. They should nowadays be considered the main mechanism for handling alternative or exceptional paths. It seems that these alternative paths still don't always get the attention they deserve, though. Proper exception handling takes quite some effort, but will eventually.
PHP AJAX
In this post, we'll construct a chat application in PHP and AJAX that will be a real-time chat application that is used for support and maintenance on nearly all websites nowadays. Like (2) 0 (0)
PHP XML
XML and PHP teaches PHP developers how to use PHP's XML functions to develop and maintain XML-based web applications and sites, and it demonstrates the power inherent in the XML/PHP combination. This book provides information on all hte major XML technologies supported in PHP, demonstrating how the XML/PHP combination can be used to deliver cutting-edge web applications through practical examples and real-world case studies.
PHP OOP
Object-Oriented Programming, or OOP, is a unique approach to programming. For some jobs, it is said to be more powerful and faster than standard PHP programming. OOP makes it simple to create and manage tasks. Some of the benefits of OOP include: 1. Simple to use 2. It's simple to use. 3. It keeps you from doing the same thing over and over again. 4. Quick and effective When compared to other programming techniques, OOP is more difficult to grasp.
oops concepts in php with examples
PHP CLASSES OBJECTS
We may make several objects from a single class, each with its own set of attributes. To work with a class, we must first create an object.
PHP CONSTRUCTOR DESTRUCTOR
Let us take a look at the base class constructor and derived class which extends the base class using the extends keyword which has its own constructor to execute and the parent constructor to execute as well. Till now we learned only about the constructor declared in a class. Let us add some more knowledge to the constructor here. With the following example, the base class Person has a constructor, now this constructor is called by the derived class or the Sub Class by using parent keyword and thus can access
PHP STATIC METHODS PROPERTIES
You've already learnt how to create a class that has methods and properties. To utilise the class's methods and properties, you must first construct an object and then use the object to access the class's methods and properties. These methods and properties are referred to as instance methods and properties because they are tied to a specific instance of the class. Instead of using an object, PHP allows you to use a class to access methods and attributes. Class methods and properties are examples of this type of method and property. Static methods and properties refer to the methods and properties of a class.
PHP ACCESS MODIFIERS
PHP has some limitations on its access modifier, unlike Java. We cannot use all the PHP access modifier on the class level, function level, and identifier level. We can use these access modifiers as per our business need to grant permission or revoke permission throughout the program or the application. Here are the list modifiers and whether it is applicable or not: In the above tale, NA denotes the Not Applicable. That means we cannot use the public, private and protected on the …
PHP INHERITANCE
The importance of inheritance is many more as it comes up with huge advantages with it. 1. The code reusability is one of the most frequently used in the inheritance; the base class remains as it is in between the process. As we can see in the above example of all the inheritance, the code is being re-used from one class to another. We need not required to re-write the same thing again and again. 2. A base class can be used by a number of its derived classes in the class hierarchy.
PHP ABSTRACT CLASSES
PHP 5 introduces abstract classes and methods. An abstract class is one that is typically used as a base class from which additional classes can inherit. An abstract class is a class that has or does not have data members and offers some functionality while leaving the rest to its descendant class to implement. The functionality that isn't supplied by the parent class must be given by the child class.
PHP INTERFACES
It can implement one interface per class, but it also has the flexibility to create many interfaces per class. PHP Object interfaces allow us to write code that specifies which methods a class must implement without specifying how those methods should be implemented. The interface keyword in PHP replaces the class keyword without utilising any methods that have their contents declared, in the same or similar way as the class keyword does. An interface can also declare a When needed, a class or classes can implement several interfaces by separating each interface with a comma. It may also be expanded using the "extends" method in PHP Programming Language, much like classes. The next level of abstraction is PHP Interfaces. It's similar to abstract classes, but there's a little distinction.
PHP MYSQL DATABASE
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PHP MYSQL EXTENSION
Now there are some PHP warnings over the log but I’m pretty shouldn’t cause the WordPress to fail so the best way to troubleshoot this is to look for the .htaccess file or any PHP dot ini file at the root folder of your website I really am proceeded by editing the .htaccess file, So you can see that the default is there but there are some additional PHP line so this may be the line.
PHP MYSQL CONNECT
When it comes to the word "database connection" in PHP, MySQL has a number of ways for an application to connect to the database and perform database operations. We can do a variety of things after connecting PHP to MySQL, such as inserting records, deleting records, updating records, and so on.
PHP MYSQL CREATE DATABASE
In this clip, you'll learn how to generate a simple relational database with PHP and MySQL. Whether you're new to the PHP: Hypertext Preprocessor scripting language or are a seasoned web developer merely looking to improve your chops, you're sure to find benefit in this free video programming lesson. For more information, including detailed, step-by-step instructions, take a look.
PHP MYSQL CREATE TABLE
MySQL: PHP Make a table. The database stores data in the form of tables. A table is made up of rows and columns and has its own name. Syntax: TABLE table name (column name column type); CREATE TABLE table name (column name column type); Using PHP and MySQL, create a table. We'll make a database connection first, then perform a mysql query to build a table.
PHP MYSQL INSERT DATA
We must first construct a table for your data. Scroll down to the next section if you've already made one. Using phpMyAdmin, which is available in your hosting control panel, to create a table is a straightforward procedure. You should see something like this after logging into your phpMyAdmin page:
PHP MYSQL SELECT DATA
If I select id 1, then 1 id row should be select. I want to get the specific data row by ID using PHP and MYSQL. Is it possible to select and display data by id? The data should be fetched by the id and display. For example - id name . 1 Mack . 2 John . 3 Sem . If I select the id 1, then a mack name should be displayed. Is it possible to fetch specific data row and display a single row.
PHP MYSQL UPDATE DELETE DATA
We will execute an update operation in this lesson. The data in the database is updated using a PHP script and a MySQL update query. In PHP, this is referred to as an edit operation. The Update query is used to update data from the table. First and foremost, you must understand how to enter and show data from a table. When the data appears on the web page, you may change it with a single click.
PHP MYSQL PREPARED
The MySQL Client Server Protocol defines a different data transfer protocol for prepared statements and non-prepared statements. Prepared statements are using the so called binary protocol. The MySQL server sends result set data "as is" in binary format. Results are not serialized into strings before sending. Client libraries receive binary data and try to convert the values into appropriate PHP data types. For example, results from an SQL
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