13. Which mode should be used to open a file for both reading and writing in PHP?

What does the 'a' mode do when opening a file in PHP?

A). Appends data to the end of the file

B). Reads data from the file

C). Truncates the file to zero length

D). Creates a new file if it doesn't exist

Which function is used to open a file in PHP?

A). fopen()

B). readfile()

C). file_get_contents()

D). file_put_contents()

How do you check if a file is writable in PHP?

A). is_writable()

B). can_write()

C). is_writeable()

D). writable_file()

What happens if you try to open a non-existent file in 'r' mode?

A). fopen() returns false

B). A new file is created

C). The script throws an error

D). The file is opened in read mode

Which mode should be used to open a file for writing in PHP?

A). w

B). r

C). a

D). wb

What is the purpose of the 'w+' mode when opening a file in PHP?

A). Read and write mode, truncates file to zero length

B). Append mode, creates new file if it doesn't exist

C). Write mode, appends data to end of file

D). Read mode, creates new file if it doesn't exist

What does the 'rb' mode do when opening a file in PHP?

A). Read mode for binary files

B). Read mode for large files

C). Read mode with buffering

D). Read mode with backup

What is the purpose of the 'x' mode when opening a file in PHP?

A). Create a new file and open it for writing

B). Read the file in exclusive mode

C). Execute the file as a PHP script

D). Export file contents to another format

Which function is used to write data to a file in PHP?

A). fwrite()

B). fput()

C). file_write()

D). put_file()

What is the purpose of the 'b' mode when opening a file in PHP?

A). Binary mode for reading and writing data

B). Read mode for large files

C). Backup mode for file operations

D). Buffer mode for file handling