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In PHP OOP, a class implements an interface using the implements keyword like class ClassName implements ______.

  • InterfaceName
  • ClassName
  • TraitName
  • AbstractClassName
In PHP OOP, a class implements an interface using the implements keyword followed by the name of the interface or a comma-separated list of interface names. For example: class ClassName implements InterfaceName { } By implementing an interface, a class agrees to fulfill the contract defined by the interface. The class must provide an implementation for all the methods defined in the interface. A class can implement multiple interfaces by listing them after the implements keyword, separated by commas. This allows the class to define behavior and functionality according to multiple contracts. To know more about interface implementation, visit: http://php.net/manual/en/language.oop5.interfaces.php
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You need to generate a random number in your PHP script. What function would you use and why?

  • rand()
  • ceil()
  • floor()
  • round()
To generate a random number in PHP, you can use the rand() function. The rand() function generates a pseudo-random number within a specified range or, if no range is given, between 0 and the maximum random value supported by the system. This function is useful when you need to generate random numbers for various purposes, such as generating random IDs or selecting random elements from an array. Learn more: https://www.php.net/manual/en/function.rand.php
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What function do you use in PHP to establish an HTTP connection and fetch the content of a web page?

  • file_get_contents()
  • curl_exec()
  • fopen()
  • All of the above
In PHP, you can establish an HTTP connection and fetch the content of a web page using the file_get_contents() function. This function allows you to retrieve the contents of a file or URL and returns the content as a string. By providing a URL as the parameter, you can establish an HTTP connection and fetch the HTML content of a web page. Additionally, you can use this function with various options and stream contexts to handle different scenarios, such as setting HTTP headers or sending POST data. The file_get_contents() function provides a simple way to retrieve web page content in PHP.
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How to run the interactive PHP shell from the command line interface?

  • Run the command php -a
  • Execute the interactive_shell.php script
  • Type start interactive_shell.php
  • Use the command php interactive_shell.php
To run the interactive PHP shell from the command line interface, you can use the command php -a. This command starts an interactive mode where you can enter and execute PHP code directly. It allows for quick testing and experimentation without the need for a complete PHP script.
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In a PHP for loop, the three expressions are typically used to set the initial value of a counter variable, provide the condition that the loop should end, and ______.

  • Specify the number of iterations
  • Modify the counter variable
  • Print the result of each iteration
  • Define the code block to be executed
In a PHP for loop, the three expressions are typically used to set the initial value of a counter variable, provide the condition that the loop should end, and modify the counter variable. The initial value expression sets the starting point of the counter variable, the condition expression determines when the loop should end, and the modification expression updates the counter variable after each iteration. These expressions work together to control the loop's flow and determine how many times the loop executes the code block. Learn more: https://www.php.net/manual/en/control-structures.for.php
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Which of the following are common uses of the $_POST superglobal in PHP?

  • Processing form submissions, such as user registrations or contact forms.
  • Accessing data from the URL's query string.
  • Retrieving data sent via an HTML form using the GET method.
  • Storing data in cookies.
Common uses of the $_POST superglobal in PHP include processing form submissions, such as user registrations or contact forms. When an HTML form is submitted using the POST method, the form data is accessible through $_POST, allowing you to validate, process, and store the submitted data. Accessing data from the URL's query string is typically done using the $_GET superglobal. The last option, storing data in cookies, is unrelated to the $_POST superglobal. Learn more: https://www.php.net/manual/en/reserved.variables.post.php
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You need to include a file in your PHP script, but you want to cause a fatal error if the file is not found. Which statement would you use and why?

  • include()
  • require()
  • include_once()
  • require_once()
To include a file in your PHP script and cause a fatal error if the file is not found, you would use the require() statement. If the file is not found, a fatal error will be generated, and the script execution will be halted, ensuring that the required file is available before continuing with the script.
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Which of the following are valid ways to denote a comment in PHP?

  • /* Comment */
  • < !-- Comment -- >
  • // Comment
  • All of the above
In PHP, there are two types of comment syntax. The first type, //, is for single-line comments. The second type, /.../, is for multiple-line comments. HTML-style comments (< !--...-- >) are not recognized by PHP. So, both /* Comment */ and // Comment are valid ways to denote a comment in PHP. Learn more: https://www.php.net/manual/en/language.basic-syntax.comments.php
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What does $_SERVER mean?

  • An array of server variables
  • A predefined server constant
  • A function for server-side scripting
  • A global function
In PHP, $_SERVER is an array that contains server information, such as headers, paths, and script locations. It is a superglobal variable accessible from anywhere in the PHP script. Learn more: http://php.net/manual/en/reserved.variables.server.php
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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
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