Unit 4 PHP

What function is used to open a file in PHP?

• file_open

• fopen

• readfile

• file_get_contents

How do you read a file line by line in PHP?

• Use file() to read the file into an array of lines.

• Use file_get_contents() to read the entire file at once.

• Read the file using readfile() and echo the content.

• Use fopen() to open the file, then fgets() in a loop to read each line.

What is the purpose of the 'fgets' function?

• To read a line of text from a file or input stream.

• To write a line of text to a file.

• To read a single character from a file.

• To delete a line of text from a file.

How can you check if a file exists before reading it?

• Use 'os.path.exists(file_path)' to check if a file exists.

• Attempt to read the file and catch an error if it doesn't exist.

• Check the file size to determine if it exists.

• Use 'file.exists(file_path)' to check if a file exists.

What function would you use to write data to a file?

• write()

• append()

• export()

• save()

Explain the difference between 'fopen' and 'file_get_contents'.

• 'fopen' reads the entire file into a string, while 'file_get_contents' opens files with a file handle.

• 'fopen' is for opening files with a file handle, while 'file_get_contents' reads the entire file into a string.

• 'fopen' can only open text files, while 'file_get_contents' can open any file type.

• 'fopen' is used for writing to files, while 'file_get_contents' is for reading binary data.

What mode would you use with 'fopen' to append data to a file?

• a

• r

• rb

• w

How do you close a file after reading or writing?

• Use the file.close() method.

• Use the file.end() method.

• Call file.terminate() to close it.

• Invoke file.shutdown() to finish.

What is the return type of 'fread' function?

• void

• char

• int

• size_t

How can you read an entire file into an array in PHP?

• $lines = file('path/to/file.txt');

• $lines = fopen('path/to/file.txt');

• $lines = readfile('path/to/file.txt');

• $lines = file_get_contents('path/to/file.txt');