PHP File Handling Aptitude Questions and Answers

Correct answer: 1
PHP supports file handling to create, read, write, upload, and edit files

Explanation:

PHP supports file handling to create, read, write, upload, and edit files. We can also perform read and write operations with the text files, spreadsheets, etc.

Correct answer: 2
readfile()

Explanation:

The readfile() function is used to read data from an existing file and write to the output buffer.

Correct answer: 2
Warning

Explanation:

The above code will generate a warning "No such file or directory".

Correct answer: 3
A, B, and C

Explanation:

There are following functions are used for file handling in PHP:

1. fopen()
2. fread()
3. fwrite()
4. fgets()
5. fputs()
6. readfile()
7. etc

Correct answer: 3
die()

Explanation:

The die() function is used to print the message on webpage and exit from current PHP script, it is similar to the exit() function, the syntax of the die() is given below:

die("message");

Correct answer: 4
A, B, C, and D

Explanation:

There are the following file modes are used with fopen() function:

1. "r"
2. "w"
3. "a"
4. "x"
5. "r+"
6. "w+"
7. "a+"
8. "x+"

Correct answer: 1
This file mode is used to create a new file for write-only, if the specified file already exists then fopen() function return FALSE in the 'x' file mode.

Explanation:

The 'x' file mode is used to create a new file for write-only, if the specified file already exists then fopen() function return FALSE in the 'x' file mode.

Correct answer: 3
filesize()

Explanation:

The filesize() function is used to get the length of the specified file. The syntax of filesize() is given below:

filesize("filename");

This function returns an integer values.

Correct answer: 1
fread($file_ptr, $num_of_bytes_to_read)

Explanation:

The correct syntax of fread() is :

fread($file_ptr, $num_of_bytes_to_read);

• $file_ptr : Pointer to the opened file
• $num_of_bytes_to_read : Total number of bytes to be read from the opened file.

The fread() function returns data read from the opened file.

Correct answer: 2
fgets()

Explanation:

The fgets() function is used to read a single line from the file in PHP, the syntax of the fgets() function is given below:

fgets($file_pointer);

It returns line that is read from the file.

Correct answer: 3
fgetc()

Explanation:

The fgetc() function is used to read a single character from the file, the syntax of the fgetc() function is given below:

fgetc($file_ptr);

This function returns a single character that is read from the file.

Correct answer: 3
unlink()

Explanation:

The unlink() function is used to delete a specified file. The syntax is given below:

bool unlink("filename");

The unlink() function returns true, if file is deleted successfully, otherwise it returns false.

Correct answer: 2
file_exists()

Explanation:

The file_exists() function is used to check a specified file is exists of or not. We can understand this using below example:

<?php
if (file_exists('myfile.txt'))
{
    echo 'file exists!';
}
else
{
    echo 'file does not exist';
}
?>

Correct answer: 4
copy()

Explanation:

The copy() is used to copy the content of a file to the another specified file. The syntax of copy() function is given below:

bool copy($source, $dest);

Correct answer: 1
feof()

Explanation:

The feof() function is used to check the end of file while reading data from the file. We can understand feof() function properly using below code:

<?php
$file_ptr = fopen("my.txt", "r") or die("file opening failed");

while (!feof($file_ptr))
{
    echo fgetc($file_ptr);
}
fclose($file_ptr);
?>

Correct answer: 3
file_get_contents()

Explanation:

The file_get_contents() function is used to read the entire file content from the specified file. The syntax is given below:

file_get_contents("myfile.txt")

Correct answer: 4
file_uploads

Explanation:

The file_uploads directive is used to enable/disable file uploading in the "phh.ini" file. If we want to allow file uploading then we need to write like this:

file_uploads = On

Correct answer: 4
$_FILES

Explanation:

The $_FILES super global variable is used to upload a file in PHP.

Correct answer: 1
if ($_FILES["fileToUpload"]["size"] > 1024)

Explanation:

The $FILES is a super global variable, here we use size then we can check size limit 1KB to upload a file.

Correct answer: 3
fclose()

Explanation:

The fclose() function is used to close a file, the syntax of flcose() function is given below:

fcloe($file_ptr);