In PHP, the ________ function can be used to return a part of a string.
- substr()
- split()
- slice()
- cut()
The 'substr()' function in PHP is used to extract a portion of a string. It takes the original string and specifies the start and length of the substring to be returned.
A developer wants to store multiple values in a single variable. Which of the following data types in PHP should he/she use?
- Array
- String
- Integer
- Object
To store multiple values in a single variable, an array should be used in PHP. Arrays can hold various data types and are versatile for handling collections of data.
When dealing with form data in PHP, which function can be used to check if a particular input filter is supported?
- filter_has_var()
- validate_input()
- check_input_filter()
- is_filter_supported()
The filter_has_var() function is used to check if a particular input filter is supported for a specific form input. This is essential for input validation in PHP.
In the context of PHP, what does the acronym "DRY" stand for?
- Don't Repeat Yourself (DRY)
- Data Retrieval Yield
- Document Representation Yields
- Development Reuse Yield
In PHP, "DRY" stands for "Don't Repeat Yourself," a programming principle that emphasizes reusing code to avoid redundancy and improve maintainability.
When using PDO, which method fetches the next row from a result set?
- fetch()
- fetchNext()
- fetchRow()
- getNextRow()
The fetch() method in PDO is used to fetch the next row from a result set. It allows you to retrieve data from the result set one row at a time, facilitating efficient handling of large datasets.
To remove white spaces from the beginning and end of a string, you would use the ________ function in PHP.
- trim()
- remove_spaces()
- strip_whitespaces()
- clean_string()
The trim() function in PHP is used to remove white spaces from both the beginning and the end of a given string, making it useful for data cleaning.
Which of the following is a common best practice when writing PHP functions?
- Use global variables extensively
- Make functions as long as possible
- Provide meaningful function names
- Avoid using return statements inside
Giving functions meaningful names is essential for code readability and maintainability, a best practice in writing PHP functions.
To check if a specific cookie is set in PHP, you can use the ________ superglobal array.
- $_GET
- $_SESSION
- $_COOKIE
- $_POST
The correct option is $_COOKIE. In PHP, $_COOKIE is a superglobal array used to access cookies set in the client's browser.
To replace all occurrences of a search string with a replacement string in PHP, you would use the ________ function.
- str_replace()
- replace_string()
- find_replace()
- substitute_string()
The str_replace() function is used in PHP to replace all occurrences of a search string with a replacement string within a given string.
Which keyword is used to create a class in PHP?
- class
- define
- new class
- make class
The 'class' keyword is used to define and create a class in PHP. Classes are the blueprint for objects in object-oriented programming.