PHP Programming Quiz

The primary key field name in the 'keyContacts' table of the 'c203project' database is contact_id, CONTACT_ID, or contact_ID.

The correct answer is "array" because the prompt asks to complete the code according to the provided comment, which is "array". This suggests that the missing code should be the word "array" to fulfill the requirement.

The blank should be filled with "form" because HTML tags are case-insensitive, meaning that "form" and "FORM" are both valid tags. However, conventionally, HTML tags are written in lowercase, so "form" is the most appropriate choice. "Form" is also a valid tag, but it is less commonly used and may cause confusion.

To ensure that the password being typed in is not visible to the user, the "type" attribute of the input field should be set to "password". By setting this attribute, the characters entered by the user will be masked with asterisks or bullets, preventing anyone from seeing the actual characters. In this case, the lines "password", "PASSWORD", and "Password" should all have the "type" attribute set to "password" to hide the password as it is being typed.

The "isset" function in PHP is used to check if a variable is set and not null. In this context, it is being used to check if the session information for an authenticated user exists. By using the "isset" function, the code can determine whether the session information is available or not, allowing the program to proceed accordingly.

The fopen() function requires two mandatory arguments (parameters) to be passed. The answer options provided, "2", "TWO", and "two", all indicate the same number of required arguments.

The code is expected to be completed by adding the variable `$cnter` in the designated location. This variable could be assigned any value or used in any way as required by the code.

The given correct answer is $_SESSION because it is the superglobal variable in PHP that is used to store session data. In this code, the $_SESSION variable is being used to set session information for an authenticated user. It allows the user's data to be stored and accessed across multiple pages during their session on the website.

The index number to access the 2nd item in a numerically indexed array is 1. In programming, arrays are typically zero-indexed, meaning that the first item in the array is accessed using an index of 0. Therefore, the 2nd item would be accessed using an index of 1.

Arrays are versatile data structures in PHP that allow you to store collections of values under a single variable name. This is useful for organizing and managing related data, such as a list of products, user names, or test scores. Arrays can be accessed and manipulated using their index, which represents the position of each element within the array.

The missing code is the arrow operator (=>) in JavaScript. This operator is used in arrow function expressions to define anonymous functions. It allows for a more concise syntax compared to traditional function expressions.

The value of $y is 34 because there is no code provided to modify or update the value of $y within the loop. Therefore, the initial value of $y, which is 34, remains unchanged and is printed on the screen.

The first argument (parameter) of the fopen() function should be a string data type.

The PHP code that is executed when the Calculate button of this form is pressed is trainSvc.php.

The correct order of the steps is as follows:
1. Connect to Database Server - This step should come first as it establishes a connection to the database server.
2. Retrieve HTML form data - After connecting to the database server, the next step is to retrieve the data entered in the HTML form.
3. Build SQL statement - Once the form data is retrieved, it needs to be used to construct the SQL statement that will be executed.
4. Execute SQL query - After building the SQL statement, it is executed to perform the desired operation on the database.
5. Close database connection - Finally, the database connection is closed to free up resources and ensure proper termination of the connection.

The correct answer is "session_start(), session_start ( ), session_start ()".

The code is incomplete and requires the session_start() function to be called in order to start or resume a session. The function is called with empty parentheses as it does not require any parameters. The code includes three variations of calling the session_start() function, with and without spaces between the function name and parentheses. All three variations are valid and will achieve the same result of starting the session.

The "enctype" attribute is used in HTML forms to specify how the form data should be encoded before it is sent to the server for processing. It is typically used in conjunction with the "method" attribute, which specifies the HTTP method to be used for submitting the form. The "enctype" attribute can take different values, such as "application/x-www-form-urlencoded" or "multipart/form-data", depending on the encoding type required for the form data.

The correct answer is $gap = $_POST['distance'];, $gap = $_POST['distance'], $gap = $_POST ['distance'] ;, $gap=$_POST['distance'];, $gap=$_POST["distance"];

The given PHP statements are used to retrieve data from a form that is submitted using the "post" method. The input in the form is named 'distance'. The data from this input is stored in the variable $gap using the $_POST superglobal array. The different variations of the statement all achieve the same result of storing the submitted data in the variable $gap.

The return type of the strcmp() function is "int".

The while-loop will continue executing as long as the value of $myData is less than 33. Once $myData reaches 33, the condition $myData

The given answer provides all possible correct ways to access the value of the "contact_name" field from the $record array in PHP. The code can be completed by using any of these four options: $record['contact_name'], $record ['contact_name'], $record["contact_name"], or $record ["contact_name"]. These options demonstrate the flexibility of PHP in allowing different syntaxes for accessing array values.

The code is using the sha1 function to encrypt the password before storing it in the database. The function takes the variable $passw as input and returns the encrypted value. The correct answer includes all variations of the sha1 function calls with different spacing between the function name and the variable.

The value of $x is 32 because there is no code provided that would modify the value of $x. Therefore, the initial value of $x, which is 32, remains unchanged and is printed on the screen.

Functions are essential for organizing and modularizing PHP code. They encapsulate a set of instructions that perform a specific task, allowing you to break down complex programs into smaller, more manageable units. Functions can be called multiple times within a program, promoting code reusability and reducing redundancy.

The result of executing a failed INSERT SQL query is False. This means that the query was not successful in inserting the data into the database. The False value indicates that the operation did not complete as intended and no changes were made to the database.

The function mysqli_fetch_row($allRows) will return a numerically indexed array containing the result row after executing a successful SELECT SQL query. This function fetches the next row from the result set and returns it as an array, where the array indices correspond to the column numbers.

The correct answer is "http://localhost/myProject/postItem.html". This is because XAMPP is installed in the "c:\xampp\" folder, and the "postItem.html" file is located in the "c:\xampp\htdocs\myProject\" folder. To access the file through the browser on the same machine, we use the "localhost" address followed by the relative path to the file, which in this case is "/myProject/postItem.html".

The correct answer is mysqli_fetch_array($allRows), mysqli_fetch_row($allRows), mysqli_fetch_array ($allRows), mysqli_fetch_row ($allRows), mysqli_fetch_row($allRows).

The correct answer is mysqli_num_rows($ans) because the mysqli_num_rows function is used to get the number of rows returned from a SELECT statement. In this case, the variable $ans is likely to hold the result of a database query, and mysqli_num_rows($ans) will return the number of rows in that result.

The result of executing a successful SELECT SQL query is a result object. This object contains the retrieved data from the database based on the conditions specified in the query. It can be used to access and manipulate the returned data in the application code.

The correct answer is to use the mysqli_query() function to execute the SQL query stored in the variable $selectStr using the database connection stored in the variable $conn. This function is used to send a query to the database and returns a result set if the query is successful.

Concatenation is a common operation in PHP used to join strings together. This is often used to create dynamic output, such as combining a user's name with a greeting or constructing a file path. The concatenation operator in PHP is the period (.), which is used to join two or more strings into a single string.

Variables are fundamental building blocks in PHP programming. They allow you to store and manipulate data within your code, making it more dynamic and adaptable. By assigning values to variables, you can perform calculations, display information, and control the flow of your program.

The echo statement is a fundamental tool in PHP for displaying information to the user. It allows you to send data, such as text strings, variables, or the results of calculations, to the web browser, where it is rendered as part of the webpage.

The given answer is the most appropriate statement to check for the successful execution of a SELECT SQL query. It uses the mysqli_query() function to execute the query "SELECT * FROM keyContacts" using the connection variable $link. If the query is executed successfully, it will return a result object, indicating that the query was successful.

$query1 = "INSERT INTO keyContacts (contact_name, phone, email) VALUES ($name, $contactno, $eMail)";

$queryCount = "SELECT COUNT(*) FROM keyContacts";

The correct answer is to use the PHP statement:

mysqli_connect("sit.rp.sg", "admin", "pWd!", "c203project")

This statement connects to the MySQL Server on the server "sit.rp.sg" using the username "admin" and password "pWd!". It also specifies the database "c203project" to be used.

$querySel = "SELECT contact_name FROM keyContacts WHERE email LIKE '%rp.sg'";

The correct answer is to use any of the provided PHP statements to display the output "Gap: [value of $gap] cm". The statements concatenate the string "Gap: " with the value of the variable $gap and the string " cm" using the concatenation operator ".". The spacing between the strings and the variable is properly maintained in all the statements to ensure the correct output format.