The $_POST superglobal in PHP is often used to collect form data sent via the POST method.
- TRUE
- FALSE
The statement is true. The $_POST superglobal is commonly used to collect form data submitted via the POST method. When an HTML form is submitted with the POST method, the form data is sent in the body of the HTTP request, and PHP populates the $_POST superglobal with the submitted values. This allows developers to access and process the form data securely. Learn more: https://www.php.net/manual/en/reserved.variables.post.php
How do you sort an associative array by its keys in PHP?
- Use the ksort() function.
- Use the sort() function.
- Use the asort() function.
- Use the rsort() function.
To sort an associative array by its keys in PHP, you would use the ksort() function. The ksort() function arranges the elements of an associative array in ascending order based on their keys. The values associated with each key remain linked to their corresponding keys even after sorting. This function directly modifies the original associative array by rearranging its key-value pairs. Sorting an associative array by keys can be useful when you need to organize and retrieve data based on a specific key order. Learn more: https://www.php.net/manual/en/function.ksort.php
The elseif statement in PHP can be used to test multiple conditions.
- TRUE
- FALSE
- nan
- nan
The elseif statement in PHP can be used to test multiple conditions. It allows you to specify a new condition to be checked if the preceding if condition is false. By using elseif, you can create a chain of conditions to be evaluated sequentially until a matching condition is found. This enables you to handle different scenarios and execute different code blocks based on different conditions. The elseif statement is a powerful tool for implementing complex decision-making logic in your PHP scripts. Learn more: https://www.php.net/manual/en/control-structures.elseif.php
You are writing a PHP script and you need to add the values of two variables. How would you do this using operators?
- $sum = $var1 + $var2;
- $sum = $var1 - $var2;
- $sum = $var1 * $var2;
- $sum = $var1 / $var2;
To add the values of two variables in PHP, you would use the + operator. The expression $sum = $var1 + $var2; will add the values of $var1 and $var2 and store the result in the variable $sum. The + operator is the arithmetic addition operator in PHP and is used to perform addition operations on numerical values. Learn more: https://www.php.net/manual/en/language.operators.arithmetic.php
Which of the following functions can be used in PHP to find the length of a string?
- strlen()
- count()
- size()
- length()
The strlen() function in PHP can be used to find the length of a string. It returns the number of characters in a string. The count() function is used to count the number of elements in an array or an object. The size() and length() functions do not exist in PHP as built-in functions for finding the length of a string. Learn more: https://www.php.net/manual/en/function.strlen.php
The main purpose of a constructor in a PHP class is to initialize the object when it is created.
- object
- properties
- methods
- variables
The main purpose of a constructor in a PHP class is to initialize the object when it is created. The correct option is "object." The constructor is called automatically when an object is created from the class, allowing you to initialize its properties or perform other setup tasks. For more information, consult the PHP documentation on constructors: http://php.net/manual/en/language.oop5.decon.php
How can you encode a PHP array into a JSON object?
- json_encode()
- json_serialize()
- json_convert()
- All of the above
To encode a PHP array into a JSON object, you can use the json_encode() function. It converts a PHP value (such as an array) into its JSON representation. The other mentioned options (json_serialize(), json_convert()) are not valid PHP functions for encoding an array into a JSON object. For further details, refer to the PHP documentation on json_encode(): http://php.net/manual/en/function.json-encode.php
Which of the following are ways to access a global variable inside a function in PHP?
- Use the global keyword followed by the variable name inside the function.
- Pass the global variable as a parameter to the function.
- Access the variable directly without any special keyword or parameter passing.
- All of the above
All of the given options are valid ways to access a global variable inside a function in PHP. You can use the global keyword followed by the variable name inside the function to indicate that you want to work with the global variable. Alternatively, you can pass the global variable as a parameter to the function. Additionally, global variables can be accessed directly from within the function without any special keyword or parameter passing. Learn more: https://www.php.net/manual/en/language.variables.scope.php#language.variables.scope.global
To delete a cookie in PHP, you can use the setcookie() function with an expiration date in the ______.
- past
- future
- present
- distant
To delete a cookie in PHP, you can use the setcookie() function and set the expiration date in the past. This causes the browser to discard the cookie, effectively deleting it. Additional information: http://php.net/manual/en/function.setcookie.php
What is the continue statement used for in PHP?
- Skipping the remaining code in the current iteration of a loop
- Resuming the next iteration of a loop
- Breaking out of a switch statement
- Terminating the execution of a function
The correct option is: "Resuming the next iteration of a loop." In PHP, the continue statement is used to skip the remaining code in the current iteration of a loop and move on to the next iteration. It is commonly used when you want to skip certain iterations based on a condition. Learn more: https://www.php.net/manual/en/control-structures.continue.php