You need to handle file uploads in your PHP script, including checking the size and type of the uploaded file and handling any upload errors. How would you do this?
- $_FILES and validation
- $_POST and validation
- $_GET and validation
- $_REQUEST and validation
To handle file uploads in PHP, you can use the $_FILES superglobal array to access the uploaded file information. Then, you can validate the file size and type and handle any upload errors. Learn more: http://php.net/manual/en/features.file-upload.php#example-481
You need to store a user's age in your PHP script. What data type would you use and why?
- int
- float
- string
- boolean
To store a user's age in a PHP script, you would use the int data type. The int data type is used for storing whole numbers, such as the age of a person. Since the age is typically represented as a whole number without a decimal, int is the most appropriate data type for this scenario. Using int ensures that the value is stored efficiently and allows for mathematical operations if needed. Learn more: https://www.php.net/manual/en/language.types.integer.php
How can we check if the value of a given variable is alphanumeric?
- You can use the ctype_alnum() function in PHP to check if the value of a given variable is alphanumeric.
- You can use the is_numeric() function in PHP to check if the value of a given variable is alphanumeric.
- You can use the is_string() function in PHP to check if the value of a given variable is alphanumeric.
- You can use the preg_match() function in PHP with a regular expression pattern to check if the value of a given variable is alphanumeric.
To check if the value of a given variable is alphanumeric in PHP, you can use the ctype_alnum() function. The ctype_alnum() function returns true if all characters in the string are alphanumeric (letters or digits), and false otherwise. It can be used to validate user input or check if a variable contains only alphanumeric characters. For example, you can use ctype_alnum($var) to check if the value of $var is alphanumeric. It's important to note that the ctype_alnum() function only works with string values. If you need to check alphanumericity for numeric values, you can use a combination of is_string() and is_numeric() functions.
The is_numeric() function in PHP checks if a variable is a(n) ______.
- Number
- Integer
- String
- Numeric
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
You are writing a PHP script and you need to include a file. How would you do this?
- include()
- require()
- include_once()
- require_once()
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.
What data type would be used in PHP to store a numeric value without a decimal?
- int
- float
- string
- array
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
When is a conditional statement ended with endif?
- A conditional statement in PHP is ended with endif when using the alternative syntax for control structures.
- A conditional statement in PHP is ended with endif when the condition contains multiple lines of code.
- A conditional statement in PHP is ended with endif when using the switch statement.
- A conditional statement in PHP is ended with endif when the condition is negated using the ! operator.
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.
What is Form Handling in PHP?
- It is the process of creating and styling HTML forms.
- It is a method for securely transmitting form data over the internet.
- It is a technique for processing and managing data submitted through HTML forms.
- It is a function used to validate user inputs in HTML forms.
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
What does PHP stand for?
- Personal Home Page
- PHP: Hypertext Preprocessor
- Post Hypertext Processor
- Protocol Home Processor
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
In PHP, a number must be within a certain range to be considered an integer.
- TRUE
- FALSE
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