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A common use case for the $_POST superglobal in PHP is to collect the form data after submitting an HTML form with ______.

  • PUT
  • GET
  • DELETE
  • POST
A common use case for the $_POST superglobal in PHP is to collect the form data after submitting an HTML form with POST as the method. The POST method is commonly used when sensitive or large amounts of data need to be sent to the server. By using $_POST, the data is not visible in the URL, making it suitable for handling user authentication, processing user input, or updating a database. Learn more: https://www.php.net/manual/en/reserved.variables.post.php
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How do you handle errors when using miscellaneous functions in PHP?

  • Check the return values, use conditional statements, and utilize error handling techniques
  • Ignore errors, suppress error messages using the @ operator
  • Use the display_errors PHP configuration directive
  • All of the above
When using miscellaneous functions in PHP, you can handle errors by checking the return values of the functions. Many PHP functions return false or other specific values to indicate an error. By checking these return values, you can detect errors and take appropriate actions, such as displaying an error message, logging the error, or executing alternative code paths. Additionally, you can use conditional statements and error handling techniques like try-catch blocks to handle exceptions that may occur during function execution. It's important to handle errors effectively to ensure proper program execution and provide a good user experience.
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Which of the following are true about the $_REQUEST superglobal in PHP?

  • It is a built-in global variable in PHP.
  • It is used to retrieve the values of both GET and POST requests.
  • It is considered a security risk and should not be used.
  • It is used to access session data.
The $_REQUEST superglobal in PHP is a built-in global variable that allows access to values from both GET and POST requests. It provides a convenient way to handle user input data regardless of the HTTP method used. However, it's important to note that using $_REQUEST indiscriminately can pose security risks, so it's recommended to use specific superglobals like $_GET or $_POST when handling user input. Learn more: https://www.php.net/manual/en/reserved.variables.request.php
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What are the libxml functions in PHP used for?

  • Manipulating and parsing XML documents, validating XML against schemas
  • String manipulation, database querying
  • Image processing, networking operations
  • All of the above
The libxml functions in PHP are used for manipulating and parsing XML documents, as well as validating XML against schemas. These functions provide functionality to load XML documents, create and modify XML structures, extract data from XML, validate XML syntax and structure, and handle XML-related tasks. PHP's libxml extension is a powerful tool for working with XML data, allowing you to parse, process, and manipulate XML documents within your PHP applications.
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What is the function to round a floating-point number in PHP?

  • round()
  • floor()
  • ceil()
  • abs()
The round() function in PHP is used to round a floating-point number to the nearest integer. It accepts a single argument, the number to be rounded, and returns the rounded value. The rounding behavior can be modified by specifying the optional precision parameter. This function is useful when you need to round a floating-point number to a specific decimal place or to the nearest whole number. Learn more: https://www.php.net/manual/en/function.round.php
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In a PHP do...while loop, where is the condition tested?

  • At the end of the loop, after executing the code block
  • Before executing the code block
  • At the beginning of the loop, before executing the code block
  • Within the code block itself
In a PHP do...while loop, the condition is tested at the end of the loop, after executing the code block. This means that the code block is always executed at least once, and then the condition is checked. If the condition evaluates to true, the loop continues to execute. If the condition is false, the loop terminates. Unlike other loops, the condition in a do...while loop is evaluated at the end, ensuring that the code block executes at least once before checking the condition for further iterations. Learn more: https://www.php.net/manual/en/control-structures.do.while.php
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You need to access data sent via a form in your PHP script. How would you do this using the $_REQUEST superglobal?

  • Use the $_REQUEST['data'] syntax to access the form data directly.
  • Access the data through the $_GET superglobal.
  • Access the data through the $_POST superglobal.
  • Use the $_SERVER['QUERY_STRING'] variable to retrieve the query string.
To access data sent via a form using the $_REQUEST superglobal, you can use the same syntax as with $_GET or $_POST. For example, $_REQUEST['data'] will give you the value of 'data' from the form submission. The $_REQUEST superglobal combines the values from both GET and POST methods, allowing you to handle form data regardless of the method used. Learn more: https://www.php.net/manual/en/reserved.variables.request.php
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Which of the following are features of PHP?

  • It only supports MySQL database.
  • It can't be embedded within HTML.
  • It's only used for web development.
  • It offers a large amount of built-in functions.
PHP provides a vast amount of built-in functions that help developers avoid having to write lengthy scripts to perform common operations. This feature is one of the factors that make PHP a preferred language for web development. Learn more: https://www.php.net/manual/en/funcref.php
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How can we determine whether a variable is set?

  • isset() function
  • empty() function
  • is_null() function
  • is_set() function
In PHP, the isset() function is used to determine whether a variable is set and not null. It returns true if the variable is set and has a non-null value, and false otherwise. Learn more: http://php.net/manual/en/function.isset.php
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Which of the following are true about sorting arrays in PHP?

  • Sorting can be performed on both indexed and associative arrays.
  • Sorting modifies the original array.
  • Sorting is always done in ascending order.
  • Sorting is only applicable to numeric arrays.
The correct option is 1. Sorting can be performed on both indexed and associative arrays in PHP. You can sort arrays based on their values while maintaining key-value associations (for associative arrays) or simply rearrange the elements in ascending or descending order (for indexed arrays). The sort() and rsort() functions modify the original array, while functions like asort(), ksort(), arsort(), and krsort() maintain the original array and sort it based on certain criteria. Sorting in PHP is not limited to numeric arrays; it can be applied to arrays with various types of values. Learn more: https://www.php.net/manual/en/array.sorting.php
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