PHP Read from File - fread() Function

1. What does fread () function do in PHP?
2. What is the difference between fread () and fopen () function in PHP?
3. Does fread read whole files?
4. How do you know if Fread is successful?
5. What is Fclose function in PHP?
6. What is Fgets PHP?
7. What are the similarities and differences between fgets () and fread () in PHP?
8. What is the difference between Readfile () and fopen ()?
9. What is Fwrite PHP?
10. How do I read a Fread file?
11. Does fread return EOF?
12. What is the syntax of Fread?

What does fread () function do in PHP?

The fread() function in PHP is an inbuilt function which reads up to length bytes from the file pointer referenced by file from an open file. The fread() function stops at the end of the file or when it reaches the specified length passed as a parameter, whichever comes first.

What is the difference between fread () and fopen () function in PHP?

Fopen() returns a file handle resource, which is basically the contents of the file. ... To read from a file, the function fread() is used, and to write to a file fwrite() is used. For now we're interested in reading, so you should use "rb" for the second parameter to fopen().

Does fread read whole files?

Reads an array of count elements, each one with a size of size bytes, from the stream and stores them in the block of memory specified by ptr. The position indicator of the stream is advanced by the total amount of bytes read. The total amount of bytes read if successful is (size*count).

How do you know if Fread is successful?

If fread returns fewer than the requested number of records, you've either hit EOF or a serious read error. You can distinguish between them by checking feof() and ferror() . Similarly, if fwrite returns fewer than the requested number of records, you've either run out of disk space or hit a serious write error.

What is Fclose function in PHP?

The fclose() function in PHP is an inbuilt function which is used to close a file which is pointed by an open file pointer. The fclose() function returns true on success and false on failure. It takes the file as an argument which has to be closed and closes that file. Syntax: bool fclose( $file )

What is Fgets PHP?

The fgets() function in PHP is an inbuilt function which is used to return a line from an open file. It is used to return a line from a file pointer and it stops returning at a specified length, on end of file(EOF) or on a new line, whichever comes first.

What are the similarities and differences between fgets () and fread () in PHP?

5 Answers. fgets reads a line -- i.e. it will stop at a newline. fread reads raw data -- it will stop after a specified (or default) number of bytes, independently of any newline that might or might not be present.

What is the difference between Readfile () and fopen ()?

difference between readfile() and fopen()

These two codes both do the same thing in reading files , so what's the main difference ? ... readfile() opens the file for reading, reads it, and then prints it to the output buffer all in one go. fread() only does one of those things: it reads bytes from a given file handle.

What is Fwrite PHP?

The fwrite() function in PHP is an inbuilt function which is used to write to an open file. ... The file, string and the length which has to be written are sent as parameters to the fwrite() function and it returns the number of bytes written on success, or FALSE on failure.

How do I read a Fread file?

Reading a variable from a file using the fread:

Open the file in reading mode. If fopen function, open the file successfully, then using the fread function we can read the value of the variable.

Does fread return EOF?

If size or nitems is 0, fread() returns 0 and the contents of the array and the state of the stream remain unchanged. Otherwise, if a read error occurs, the error indicator for the stream is set, fread() returns EOF and sets errno to one of the following values: EACCES. Another process has the file locked.

What is the syntax of Fread?

The C library function size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream) reads data from the given stream into the array pointed to, by ptr.