Learn PHP

   Top 25 PHP Functions Every Developer Should Know PHP provides hundreds of built-in functions that make web development easier. Whether you're creating forms, handling files, working with databases, or manipulating strings, knowing the right functions can save time and improve your code. In this guide, you'll learn 25 essential PHP functions with examples. 1. echo() Outputs text to the browser. <?php echo "Hello, World!"; ?> 2. print() Prints a string. <?php print "Welcome to PHP!"; ?> 3. strlen() Returns the length of a string. <?php echo strlen("PHP Tutorial"); ?> Output: 12 4. str_word_count() Counts the number of words. <?php echo str_word_count("Learn PHP Programming"); ?> Output: 3 5. strtoupper() Converts text to uppercase. <?php echo strtoupper("php"); ?> Output: PHP 6. strtolower() Converts text to lowercase. <?php echo strtolower("HELLO"); ?> 7. ucfirst() Capitalizes the ...

100 PHP Interview Questions and Answers (2026) If you're preparing for a PHP developer interview, this covers the most common questions asked in technical interviews. These questions are suitable for freshers as well as experienced developers. 1. What is PHP? Answer: PHP (Hypertext Preprocessor) is an open-source server-side scripting language used to develop dynamic websites and web applications. Features: Open source Cross-platform Supports MySQL, PostgreSQL, SQLite, and more Fast and easy to learn Large developer community 2. What are the advantages of PHP? Answer: Advantages include: Easy to learn Free and open source Platform independent Supports multiple databases Large community support High performance Secure when coded properly 3. What is the latest version of PHP? Answer: PHP is actively maintained, and new versions are released regularly with security updates, performance improvements, and new features. Always use the latest stable version recommended by the PHP project ...

 PHP Security Checklist: Build Hack-Proof Applications (2026) Security is the most ignored but most important part of PHP development. This guide gives you a real-world security checklist used in production systems . 1. Prevent SQL Injection $stmt = $conn->prepare("SELECT * FROM users WHERE email=?"); 2. Prevent XSS Attacks echo htmlspecialchars($input, ENT_QUOTES, 'UTF-8'); 3. Secure Password Storage password_hash($password, PASSWORD_DEFAULT); 4. Use HTTPS Always Encrypts data between browser and server. 5. Secure Sessions session_regenerate_id(true); 6. Validate All Input Never trust user input. 7. Protect File Uploads Check file type Limit size Rename file