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You need to understand if a PHP class can have more than one constructor. What would be your conclusion?

  • No
  • Yes
  • Depends on the PHP version
  • Only if the class is abstract
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
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What does $_ENV mean?

  • An array of environment variables
  • A global constant
  • A reserved keyword
  • A global function
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
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In PHP, $GLOBALS is a superglobal array that contains references to all ______ that are currently defined in the global scope of the script.

  • Global variables
  • Local variables
  • Static variables
  • Super variables
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
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The if statement in PHP can only test one condition.

  • TRUE
  • FALSE
  • nan
  • nan
The if statement in PHP can test multiple conditions. You can use logical operators such as && (AND) and
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In PHP, a string can contain letters, numbers, and special characters.

  • TRUE
  • FALSE
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
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Unlike variables, constants in PHP are automatically ______.

  • Initialized
  • Finalized
  • Declared
  • Assigned
Unlike variables, constants in PHP are automatically declared. Once defined using the define() function, constants are available throughout the script without the need for additional declaration statements. They are immediately ready for use. On the other hand, variables need to be explicitly declared using the $ sign before they can be used. This automatic declaration of constants makes them easily accessible and convenient to use in PHP scripts. Learn more: https://www.php.net/manual/en/language.constants.php
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If the mysqli_query function returns false, it means the query execution failed. You can get the error message using the mysqli_error function like echo "Error creating table: " . mysqli_error(______).

  • $conn
  • $result
  • $mysqli_connection
  • $query
If the mysqli_query function returns false, it means the query execution failed. To get the error message, you can use the mysqli_error function. It takes the connection object ($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.
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You are using a switch statement in your PHP script and you want to execute the same block of code for multiple cases. How would you do this?

  • Group the case statements without breaks
  • Use multiple default cases
  • Use nested switch statements
  • Use if-else statements instead
To execute the same block of code for multiple cases in a PHP switch statement, you can group the case statements without using break statements. By omitting the break statement after a case block, the execution will continue to the next case without exiting the switch statement. This allows you to handle multiple cases with the same block of code. It is important to note that when grouping case statements, you need to ensure that the execution flows correctly and that unintended fall-through behavior is avoided. Learn more: https://www.php.net/manual/en/control-structures.switch.php
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You are writing a PHP script and you need to execute a block of code at least once, and then continue executing it as long as a certain condition is true. How would you do this using a do...while loop?

  • Write the code block and then use the do keyword followed by the while keyword and the condition
  • Write the code block and then use the while keyword followed by the do keyword and the condition
  • Write the code block and then use the while keyword followed by the condition
  • Write the code block and then use the do keyword followed by the condition
To execute a block of code at least once and continue executing it as long as a certain condition is true, you would use a do...while loop. The structure of a do...while loop is to write the code block first, followed by the do keyword, and then the while keyword along with the condition. The code block will always execute at least once before the condition is checked. If the condition is true, the loop will continue executing. If the condition is false, the loop will terminate. Learn more: https://www.php.net/manual/en/control-structures.do.while.php
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You need to execute a block of code in your PHP script for an unknown number of times, but the block of code needs to be executed at least once even if the condition is false. How would you do this using a do...while loop?

  • Write the code block and then use the do keyword followed by the while keyword and the condition
  • Write the code block and then use the while keyword followed by the do keyword and the condition
  • Write the code block and then use the while keyword followed by the condition
  • Write the code block and then use the do keyword followed by the condition
To execute a block of code in PHP for an unknown number of times, but at least once even if the condition is false, you can use a do...while loop. The structure of a do...while loop is to write the code block first, followed by the do keyword, and then the while keyword along with the condition. The code block will always execute at least once before the condition is checked. If the condition is true, the loop will continue executing. If the condition is false, the loop will terminate. This ensures that the code block is executed at least once regardless of the condition. Learn more: https://www.php.net/manual/en/control-structures.do.while.php
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