The elseif statement in PHP allows you to specify a new condition to be tested if the preceding if and elseif conditions are false. It provides an additional alternative to be checked after the initial if condition is false. The elseif statement can be used multiple times within a sequence of conditions to test different conditions sequentially. It is often used in conjunction with if and else statements to handle complex decision-making logic. The elseif statement is not limited to testing specific data types and can evaluate any valid condition. Learn more: https://www.php.net/manual/en/control-structures.elseif.php

In PHP, the int data type is used to store numeric values without a decimal. It can hold positive and negative whole numbers, including zero. Integers are used to perform mathematical operations and represent whole quantities in PHP. Learn more: https://www.php.net/manual/en/language.types.integer.php

Form Handling in PHP refers to the technique of processing and managing data submitted through HTML forms. It involves capturing user input, validating and sanitizing the data, and performing necessary actions based on the form data. PHP provides built-in functions and techniques to handle form data effectively, such as accessing form field values using superglobal arrays like $_POST and $_GET, validating inputs, preventing security risks like cross-site scripting (XSS) and SQL injection, and storing or processing the submitted data. Learn more: https://www.php.net/manual/en/tutorial.forms.php

The is_numeric() function in PHP checks if a variable is a numeric value, whether it is an integer, float, or a numeric string. It returns true if the variable can be evaluated as a number. This function is useful when you need to determine if a variable holds a numeric value or not. Learn more: https://www.php.net/manual/en/function.is-numeric.php

In PHP, to include a file in your script, you can use the require() statement. This will include and evaluate the specified file during runtime, allowing you to access its content in the current script.

In PHP, a conditional statement is ended with endif when using the alternative syntax for control structures. The alternative syntax provides an alternative way to write control structures such as if, else, while, for, and foreach. Instead of using curly braces {} to enclose the block of code, the alternative syntax uses endif, endwhile, endfor, endforeach, etc. For example, instead of writing if (condition) { code }, you can write if (condition): code endif;. This alternative syntax can be useful for improving readability and reducing visual clutter, especially when working with complex or nested control structures. It's important to note that the alternative syntax is optional, and the regular syntax with curly braces {} is also widely used in PHP.

PHP originally stood for "Personal Home Page", but it now stands for "PHP: Hypertext Preprocessor", a recursive backronym. This change reflects the shift in PHP's capabilities from being a simple HTML home page builder to a fully-fledged web scripting language. For more details, visit: https://www.php.net/manual/en/faq.general.php#faq.general.name

This statement is false. In PHP, a number is considered an integer as long as it does not contain a decimal point or an exponential form. The range of the number does not affect its classification as an integer. However, the size of the number may affect its storage and representation in memory. Learn more: https://www.php.net/manual/en/language.types.integer.php

The correct option is 1. The main difference between sort() and rsort() in PHP is the order in which they sort the array. The sort() function arranges the elements of an array in ascending order, while the rsort() function sorts the elements in descending order. Both functions work on indexed arrays, not specifically on associative arrays. Additionally, both sort() and rsort() modify the original array directly, rather than returning a new sorted array. Understanding the difference between these functions is important for selecting the appropriate sorting method based on the desired order of the array elements. Learn more: https://www.php.net/manual/en/function.sort.php, https://www.php.net/manual/en/function.rsort.php

The statement is true. Regular Expressions in PHP are case-sensitive by default. This means that when defining patterns or searching for matches, the case of the characters matters. For example, if a pattern specifies "abc", it will only match "abc" in the string and not "ABC" or "Abc". If case-insensitive matching is required, the appropriate modifier can be added to the Regular Expression pattern. Learn more: https://www.php.net/manual/en/reference.pcre.pattern.modifiers.php