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The ______ keyword is used in PHP to make a local variable accessible globally.

  • local
  • global
  • this
  • super
The global keyword in PHP is used to make a local variable accessible globally. By using the global keyword followed by the variable name within a function, you can access and modify the value of the variable globally, outside the function's local scope. This allows you to work with local variables in a wider scope. However, it is generally recommended to minimize the use of global variables for better code organization and maintainability. Learn more: https://www.php.net/manual/en/language.variables.scope.php#language.variables.scope.global
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You can create an object in PHP by using the new keyword followed by the class name like $object = new ______.

  • ClassName
  • ObjectName
  • NewObject
  • CreateObject
In PHP, you can create an object by using the new keyword followed by the class name and parentheses. The correct option is "ClassName." This syntax instantiates an object of the specified class. For more information, consult the PHP documentation on creating objects: http://php.net/manual/en/language.oop5.php
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In PHP, you can create a file using the fopen() function with 'w' as the mode, which will create the file if it doesn't exist and open it for ______.

  • reading
  • writing
  • appending
  • deleting
In PHP, using the 'w' mode with the fopen() function allows you to create a file if it doesn't exist and open it for writing. This mode truncates the file if it already exists, so caution should be exercised.
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If the file to be included using the include statement in PHP is not found, the script will ______.

  • generate a warning and continue execution
  • generate a fatal error and stop execution
  • automatically search for the file in other directories
  • silently fail and continue execution
If the file to be included using the include statement in PHP is not found, a warning is generated, but script execution continues. This behavior allows the script to continue executing even if a non-essential file is not found.
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How is it possible to know the number of rows returned in the result set?

  • You can use the mysqli_num_rows() function to retrieve the number of rows returned by a MySQL query.
  • You can use the mysql_count_rows() function to retrieve the number of rows returned by a MySQL query.
  • You can use the mysql_num_rows() function to retrieve the number of rows returned by a MySQL query.
  • You can use the mysql_get_rows() function to retrieve the number of rows returned by a MySQL query.
To know the number of rows returned in the result set of a MySQL query, you can use the mysqli_num_rows() function in PHP. This function returns the number of rows in the result set as an integer. It is commonly used after executing a SELECT query to determine the number of rows returned by the query. For example, you can use mysqli_num_rows($result) to get the number of rows returned by a query stored in the $result variable. It's important to note that this function works with the MySQLi extension in PHP. If you are using the deprecated MySQL extension or the PDO extension, you need to use the respective functions provided by those extensions to retrieve the number of rows.
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Which of the following PHP data types can hold multiple values?

  • int
  • boolean
  • array
  • None of the above
The array data type in PHP can hold multiple values. Arrays are used to store collections of values, and they can hold elements of different data types. An array allows you to organize and access multiple values using keys or indexes. Learn more: https://www.php.net/manual/en/language.types.array.php
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You need to create a file in your PHP script, write to it, and ensure that the file is closed properly after writing. How would you do this?

  • Use the fopen() function with 'w' mode to create the file and obtain a file handle, then use the fwrite() function to write content to the file. Finally, use the fclose() function to close the file.
  • Use the file_put_contents() function to create the file and write content to it. The function handles file creation and writing, so no explicit file handle or closing is required.
  • Use the touch() function to create the file, then use the fwrite() function to write content to the file. Finally, use the fclose() function to close the file.
  • Use the mkdir() function to create a directory instead of a file.
To create a file, write to it, and ensure proper closing in PHP, you would use the fopen() function with 'w' mode to create the file and obtain a file handle. Then, you can use the fwrite() function with the file handle to write content to the file. Finally, you would use the fclose() function to close the file and release the associated resources. This ensures that the file is created, written to, and closed properly.
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You need to retrieve the error message after an email sending operation fails in your PHP script. How would you do this using mail functions?

  • Use the error_get_last() function to retrieve the last PHP error message
  • Use the error_reporting() function to set error reporting level
  • Use the mysqli_error() function to retrieve the error message
  • Use the pdo_error() function to retrieve the error message
If there is an error during the execution of a mail function in PHP, you can use the error_get_last() function to retrieve the last PHP error message. This function returns an array containing information about the last error that occurred. You can then access the error message using the 'message' key of the returned array. For example, $error = error_get_last(); $errorMessage = $error['message']; retrieves the error message. This allows you to retrieve and handle the error message after an email sending operation fails in your PHP script.
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What are Regular Expressions in PHP?

  • They are a sequence of characters that define a search pattern.
  • They are predefined patterns used to validate email addresses.
  • They are PHP functions used to manipulate strings.
  • They are numeric values used for mathematical calculations.
Regular expressions in PHP are a sequence of characters that define a search pattern. They are powerful tools used for pattern matching and manipulating strings. Regular expressions are based on a formal language and provide a concise and flexible way to search, extract, and manipulate text data. They can be used to validate inputs, perform string substitutions, extract data from strings, and more. Learn more: https://www.php.net/manual/en/book.regex.php
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A common practice in PHP forms is to set an error variable for each field and display the error message next to the field if the ______.

  • Field value is not empty
  • Field value is empty
  • Field value is null
  • Field value is set
A common practice in PHP forms is to set an error variable for each field and display the error message next to the field if the field value is empty. This approach involves checking the value of each required field, and if any field is found to be empty when the form is submitted, you can set an error variable specific to that field. The error message can then be displayed next to the corresponding field to indicate that it is a required field and needs to be filled in. This approach provides clear and specific error messages for each required field, improving the user experience and aiding in form completion. Learn more: https://www.php.net/manual/en/tutorial.forms.php
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