This function is used to read a single line from a file. You can pass this function a file handle corresponding to an open file, and optional length.

Why fgets() used in Reading file?

• It returns a line from a file pointer and terminates at a given length, end of file(EOF), or new line, whichever comes first.
• The fgets() function is passed the file to read and the number of bytes to read as arguments, and it returns a string of length -1 bytes from the file indicated by the user.
• If it fails, it returns False.

Syntax:-

fgets(file, length)

Parameters Used:
The fgets() function in PHP accepts two parameters.
file : It specifies the file from which characters have to be extracted. 
length : It specifies the number of bytes to be read by the fgets() function. The default value is 1024 bytes.

Return Value : It returns a string of length -1 bytes from the user-specified file, or False if the operation fails.

Errors And Exceptions:-

• Because it reads a single line at a time, the method isn’t designed for huge files, and reading a long file can take a long time.
• If the fgets() method is called more than once, the buffer must be emptied.
• Although the fgets() method returns the Boolean False, it frequently produces a non-Boolean result that evaluates to False.

Let’s take one Example:-

Suppose there is a file named “test.txt” which consists of :

This is the first line.
This is the second line.
This is the third line.

Example 1:-

Output:–

Example 2:-

Output:-

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