If the mysqli_query function returns false, it means the query execution failed. To get the error message, you can use the mysqli_error function. It takes the connection object ($conn) as a parameter and returns the error message associated with the most recently executed query. You can display the error message using echo, for example: "Error creating table: " . mysqli_error($conn). This helps in troubleshooting and identifying any issues that occurred during the query execution. Ensure you have a successful connection and have executed a query before checking for errors.

When using FTP functions in PHP, you might encounter potential issues such as connection failures, authentication problems, or file transfer errors. Connection failures can occur due to network issues, server unavailability, or incorrect FTP server settings. Authentication issues may arise if the provided credentials are incorrect or if the FTP server has strict authentication requirements. File transfer errors can happen if the remote file does not exist, the local file is not readable, or if there are restrictions on file permissions. It's important to handle these issues by validating input, checking return values, and implementing error handling mechanisms to ensure successful FTP operations in PHP.

A variable declared within a function in PHP has a local scope. It means that the variable is only accessible within that specific function. It cannot be accessed outside of the function or in other functions. This helps in encapsulation and prevents naming conflicts with other variables in different functions. Learn more: https://www.php.net/manual/en/language.variables.scope.php

In PHP, statements end with a semicolon (;). The semicolon is a statement separator, allowing you to put multiple statements on the same line if desired. It's also necessary to end a statement before starting a new line with a new statement. Learn more: https://www.php.net/manual/en/language.basic-syntax.instruction-separation.php

In PHP, a class cannot have more than one constructor. The correct option is "No." Unlike some other programming languages, PHP does not support multiple constructors within a single class. However, you can achieve similar functionality by using optional parameters or method overloading. For further details, refer to the PHP documentation on constructors: http://php.net/manual/en/language.oop5.decon.php

In PHP, $_ENV is an array that contains the values of environment variables passed to the script. It provides access to environment-specific information. Learn more: http://php.net/manual/en/reserved.variables.environment.php

The correct option is 1. In PHP, the $GLOBALS superglobal is an associative array that contains references to all global variables that are currently defined in the global scope of the script. It provides a way to access and manipulate these global variables from anywhere within the script. The keys of the $GLOBALS array correspond to the variable names, and the values are references to the corresponding variables. By accessing specific elements using their names as keys in the $GLOBALS array, you can retrieve or modify the values of global variables. It is important to note that using global variables extensively can lead to code complexity and potential issues, so it is recommended to use them judiciously and consider alternative approaches for better code organization and maintainability. Learn more: https://www.php.net/manual/en/reserved.variables.globals.php

The if statement in PHP can test multiple conditions. You can use logical operators such as && (AND) and

This statement is true. In PHP, a string can contain letters, numbers, special characters, and even control characters. It is a versatile data type used for storing and manipulating text or sequences of characters. Strings can be enclosed in single quotes (''), double quotes ("") or heredoc/nowdoc syntax. Learn more: https://www.php.net/manual/en/language.types.string.php

In PHP, a boolean data type can hold one of two values: true or false. Boolean values are used to represent logical states and are often used in conditional statements or to indicate the success or failure of an operation. The value true represents a true or positive condition, while the value false represents a false or negative condition. Learn more: https://www.php.net/manual/en/language.types.boolean.php