Php examples to learn

PHP Examples

The following PHP section contains a wide collection of PHP programming examples. The PHP examples are categorized based on the topics, including array, function, date, string, JSON, file system, and many more. Each example includes multiple approaches to solve the problem.

PHP Programming Tutorial
Recent articles on PHP
PHP Output & Multiple Choice Questions

Topics

1. How to write PHP code in different ways?
2. How to write comments in PHP?
3. How to use Codeignitor (PHP)?
4. How to echo HTML in PHP?
5. How to do Error handling in PHP?
6. How to show All Errors in PHP?
7. How to Start and Stop a Timer in PHP?
8. How to create default function parameter in PHP?
9. How to check if mod_rewrite is enabled in PHP?
10. How to do Web Scrapping in PHP Using Simple HTML DOM Parser?
11. How to pass form variables from one page to another page in PHP?
12. How to display logged in user information in PHP?
13. How to find out where a function is defined using PHP?
14. How to Get $_POST from multiple check-boxes?
15. How to Secure hash and salt for PHP passwords?
16. How to detect search engine bots with PHP?
17. How to set PHP development environment in windows?
18. How to turn off PHP Notices?
19. How to use ‘

1. How to insert a new item in an array on any position in PHP?
2. How to append one array to another in PHP?
3. How to delete an Element From an Array in PHP?
4. How to print all the values of an array in PHP?
5. How to perform Array Delete by Value Not Key in PHP?
6. How to remove Array Element and do Re-Indexing in PHP?
7. How to count all array elements in PHP?
8. How to insert an item at the beginning of an array in PHP?
9. How to check if two arrays contain the same elements?
10. How to merge two arrays keeping original keys in PHP?
11. How to find the maximum and the minimum in a PHP array?
12. How to check a key exists in an array in PHP?
13. How to find the second most frequent element in a PHP array?
14. How to sort an array of objects by object fields in PHP?
15. How to sort an array of strings in natural and standard orders?
16. How to print the last value of an array without affecting the pointer?
17. How to merge the first index of an array with the first index of the second array?
18. How to create a string by joining the array elements using PHP?
19. How to sort an Array of Associative Arrays by Value of a Given Key in PHP?
20. How to make a leaderboard using PHP?
21. How to check an array is multidimensional or not in PHP?
22. How to create Multidimensional Associative Array in PHP?
23. How to merge the duplicate value in multidimensional array in PHP?
24. How to convert multidimensional array to XML file in PHP?
25. How to search by multiple key => value in PHP array?
26. How to search by key=>value in a multidimensional array in PHP?
27. How to write a PHP program to find the Standard Deviation of an array?
28. How to write PHP program to check for Anagram?

1. How to pass PHP Variables by reference?
2. How to format Phone Numbers in PHP?
3. How to use php serialize() and unserialize() Function
4. How to implement callback in PHP?
5. How to merge two or more arrays using array_merge()?
6. How to print an arithmetic progression series using inbuilt functions in PHP?
7. How to prevent SQL Injection in PHP?
8. How to extract the user name from the email ID using PHP?
9. How to count rows in MySQL table in PHP?
10. How to parse a CSV File in PHP?
11. How to generate simple random password from a given string using PHP?
12. How to upload images in MySQL using PHP PDO?
13. How to check foreach Loop Key Value in PHP?
14. How to properly Format a Number With Leading Zeros in PHP?
15. How to get a File Extension in PHP?
16. How to build a Grocery Store Web App using PHP with MySQL?
17. How to delete text from file using preg_replace() function in PHP?

1. How to get the current Date and Time in PHP?
2. How to change the date format using PHP?
3. How to convert DateTime to String using PHP?
4. How to get Time Difference in Minutes in PHP?
5. How to return all dates between two dates in an array in PHP?
6. How to sort an array of dates in PHP?
7. How to get the time of the last modification of the current page in PHP?
8. How to convert a Date into Timestamp using PHP?
9. How to add 24 hours to a unix timestamp in PHP?
10. How to sort a multidimensional array by date element in PHP?
11. How to convert timestamp to readable date/time in PHP?
12. How to find number of week days between two dates?
13. How to convert string to Date and DateTime in PHP?
14. How to get last day of a month from date in PHP?

1. How to change strings in an array to uppercase?
2. How to convert first character of all the words uppercase using PHP?
3. How to get the last character of a string in PHP?
4. How to convert uppercase string to lowercase using PHP?
5. How to extract Numbers From a String in PHP?
6. How to replace String in PHP?
7. How to Encrypt and Decrypt a PHP String?
8. How to display string values within a table using PHP?
9. How to write Multi-Line Strings in PHP?
10. How to check if a String Contains a Substring in PHP?
11. How to append a string in PHP?
12. How to remove white spaces only beginning/end of a string using PHP?
13. How to Remove Special Character from String in PHP?
14. How to create a string by joining the array elements using PHP?
15. How to prepend a string in PHP?
16. How to replace a word inside a string in PHP?
17. How to remove all white spaces from a string in PHP?
18. How to count the number of words in a string in PHP?
19. How to find number of characters in a string in PHP?
20. How to get a substring between two strings in PHP?
21. How to get a variable name as a string in PHP?
22. How to remove occurrences of a specific character from end of a string in PHP?
23. How to convert string to boolean in PHP?
24. How to generate Random String Using PHP?
25. How to generate a random, unique, alphanumeric string in PHP?
26. How to remove new lines from string in PHP?
27. How to insert string at specified position in PHP?
28. How to check a string is a rotation of another string?

Источник

PHP Tutorial: Get started with PHP from scratch

PHP is the ideal language for new developers. It is simple, fast, and intuitive. It is also very similar to other programming languages, like C, so you can pick other languages up faster with PHP knowledge.

Today we’ll get you started with PHP from the very beginning, breaking down what PHP is, why you should learn it, and some of its unique advantages. Then we’ll walk you through your first PHP “Hello World” program. Finally, we’ll cover the core PHP syntax and work through exercises.

By the end, you’ll have a solid foundation of basic PHP concepts and will be able to advance to intermediate topics. No prior knowledge of PHP is required, but to be successful in this tutorial, some general knowledge of programming will help you get the most from our exercises. For a quick introduction, , check out The Absolute Beginner’s Guide to Programming.

Here’s what we’ll cover today:

Start your PHP career for free

Learn all the basics of PHP with developer-made lessons, tutorials, and quizzes, all free of charge.

What is PHP?

PHP is a recursive acronym for PHP: Hypertext Preprocessor. It is a popular, open source scripting language that is similar to C and especially suited for web development. PHP can be directly embedded into HTML using the instructions. These simple code instructions allow you to jump between HTML and PHP code without the need for extra commands used with C or Perl.

Another unique factor of PHP is that its code is executed on the server rather than client-side, or the side of the internet that a user sees. Once executed, PHP code generates HTML, which is then sent client-side. This makes PHP very secure and ensures that users cannot see what’s going on behind the screen.

Why should you learn PHP?

PHP is a great starting point for any new developer. PHP’s simplicity means it’s easier to pick up than other languages. Even if you don’t want to work in web development, the syntax and object-oriented thinking skills of PHP can give you a significant advantage when learning other OOP languages like Java or C++.

PHP also comes with a massive community. In fact, Github reports that PHP is the 5th most popular language in the world, PHP has the 3rd largest community on StackOverflow. This large community ensures you’ll never be without help if you get stuck.

Finally, PHP is a widely sought skill in the modern digital economy, and demand is growing. Popular sites like Facebook, Wikipedia, Yahoo, and Flickr are all built on PHP. In fact, data collected by Codementor found that PHP is used for 80% of the world’s top 10 million websites and about 40% of all sites on the internet!

PHP has also gained popularity as the go-to for small businesses. This is because intuitive content management systems like WordPress and Wix are written in PHP. A lot of PHP web developers are freelance workers who help launch new websites for businesses. The need for PHP developers is increasing.

What is PHP used for?

PHP is most often used in server-side web development. Thanks to server-side execution, PHP is great for dynamic web pages, a type of site which updates periodically or reacts to certain events. PHP’s secure function-hiding abilities also make it ideal for working with sensitive financial or personal information.

Online stores are a place we can see both of these strengths come into play. For example, PHP is used in the “shopping cart” functions of many sites. This is because PHP only sends the outcome of adding the item or completed transaction without giving access to the function.

Beyond this, PHP is also used in command-side scripting and graphical user interface design (GUI). PHP shows its value as a widely available and generalized language capable of running on nearly any operating system or database.

Advantages of PHP

• Quick and Easy to Learn: PHP is beginner friendly and can be learned quickly relative to other languages. It’s also often considered a great first language.
• Large Community: PHP has a large user base and online support community.
• Widely Applicable: PHP can be used on any operating system or database.
• Open Source: PHP is free to adopt and download along with all of its tools. This also means that the language is highly receptive to community feedback.
• Great Performance: PHP uses its own memory space rather than an overhead server.

Источник