What is the purpose of the file_get_contents() function in PHP?
- To read the contents of a file into a string
- To write data to a file
- To rename a file
- To delete a file
The file_get_contents() function in PHP is used to read the contents of a file and return them as a string. It takes the file name or URL as a parameter and returns the contents of the file. This function is commonly used to read files and retrieve their contents. Learn more: http://php.net/manual/en/function.file-get-contents.php
You should use the move_uploaded_file() function in PHP to move the uploaded file to a desired directory.
- TRUE
- FALSE
- nan
- nan
In PHP, the move_uploaded_file() function is specifically designed to handle file uploads and move the uploaded file to a desired directory. It takes the temporary file path (provided in the $_FILES array) as the first argument and the desired destination path as the second argument. This function ensures proper handling of uploaded files, including security considerations and handling of file permissions and naming conflicts.
You have a PHP script and you need to get the URL of the current page. How would you do this using the $_SERVER superglobal?
- $_SERVER['REQUEST_URI']
- $_SERVER['CURRENT_URL']
- $_SERVER['PAGE_URL']
- $_SERVER['SITE_URL']
To retrieve the URL of the current page using the $_SERVER superglobal in PHP, you can use $_SERVER['REQUEST_URI']. This key contains the path and query string of the requested URL. It provides the information needed to reconstruct the URL of the current page. By accessing the 'REQUEST_URI' key within the $_SERVER superglobal, you can obtain the URL of the current page. Learn more: https://www.php.net/manual/en/reserved.variables.server.php
The ______ data type in PHP is used to store a number with a decimal point.
- int
- float
- string
- array
The float data type in PHP is used to store a number with a decimal point. Floats, also known as floating-point numbers or doubles, can represent real numbers and are used when precision is required in calculations involving decimal values. Floats can hold positive and negative values with varying degrees of precision. Learn more: https://www.php.net/manual/en/language.types.float.php
What does $GLOBALS mean?
- An array of global variables
- A constant representing the Earth
- A global function
- A reserved keyword
In PHP, $GLOBALS is an array that holds references to all variables that are currently defined in the global scope. It allows access to global variables from anywhere in the PHP script. Learn more: http://php.net/manual/en/reserved.variables.globals.php
What is the purpose of the array_pop() function in PHP?
- To remove and return the last element of an array
- To add an element to the beginning of an array
- To sort the elements of an array
- To merge two arrays into a single array
The array_pop() function in PHP is used to remove and return the last element of an array. It modifies the original array by removing the last element and returns that element. This function is useful when you need to retrieve and remove the last element from an array. Learn more: http://php.net/manual/en/function.array-pop.php
Explain the concept of dependency injection in PHP. How does it promote loose coupling and better testability?
- Dependency injection is a design pattern in PHP where dependencies of a class are provided from outside rather than being created within the class itself. This promotes loose coupling, as the class no longer needs to know how to create its dependencies. It also improves testability, as dependencies can be easily mocked or replaced during testing.
- Dependency injection in PHP is a way to inject external dependencies into a class. This promotes tight coupling between classes, as they become dependent on each other. Dependency injection improves testability by making it easier to isolate dependencies during unit testing.
- Dependency injection is a technique in PHP where a class is injected into another class as a dependency. This promotes tight coupling between classes, as they become dependent on each other. Dependency injection improves testability by making it easier to test a class in isolation.
- Dependency injection is not supported in PHP.
Dependency injection is a powerful technique in PHP that improves code maintainability and testability. It allows you to inject dependencies into a class from the outside, making the class more modular and decoupled from its dependencies. This promotes loose coupling and makes it easier to replace or mock dependencies during testing. The concept of dependency injection involves passing dependencies to a class through constructor injection or setter injection. For more information, you can refer to the PHP documentation: http://php.net/manual/en/language.oop5.decon.php
In a PHP switch statement, what does the case keyword represent?
- A value to compare the expression against
- The starting point of the switch statement
- A condition to be evaluated
- The default case
In a PHP switch statement, the case keyword represents a value to compare the expression against. Each case represents a specific value or condition that is evaluated against the switch expression. When a case matches the value of the expression, the corresponding block of code following that case is executed. The case keyword allows you to define multiple possible values or conditions to be compared within the switch statement. Learn more: https://www.php.net/manual/en/control-structures.switch.php
You can decode a JSON object into a PHP array using the json_decode() ______.
- method
- function
- property
- class
In PHP, you can decode a JSON object into a PHP array using the json_decode() function. It is a standalone function, not a method, property, or class. The json_decode() function takes a JSON-encoded string and converts it into a PHP value, typically an array or an object. The correct option is "function." For more information, consult the PHP documentation on json_decode(): http://php.net/manual/en/function.json-decode.php
You can use the $_SERVER superglobal in PHP to get the user's IP address.
- TRUE
- FALSE
The statement is true. In PHP, you can use $_SERVER['REMOTE_ADDR'] to retrieve the IP address of the user who accessed the current script. This information can be used for various purposes, such as security logging, user tracking, or geolocation. By accessing the 'REMOTE_ADDR' key within the $_SERVER superglobal, you can obtain the client's IP address. Learn more: https://www.php.net/manual/en/reserved.variables.server.php