How to use php readfile function

The readfile() function is a built-in function in PHP that reads a file and writes it to the output buffer. If successful, the function returns the number of bytes read from the file. On failure, the function returns FALSE with an error message; error output can be hidden by prepending an '@' to the function name.

#php How to use the readfile() function?

php The readfile() function reads a file and writes it to the output buffer.

Syntax:

readfile(filename,include_path,context)

Parameters:

● filename: required. Specifies the file to be read.

●include_path: optional. If you also want to search for files in include_path, you can use this parameter and set it to true.

● context: optional. Specifies the environment for a file handle. Context is a set of options that can modify the behavior of the stream.

Return value: If successful, this function returns the number of bytes read from the file. On failure, the function returns FALSE with an error message. Error output can be hidden by adding an '@' in front of the function name.

Note: If "fopen wrappers" has been activated in the php.ini file, you can use the URL as the file name in this function.

Let’s take a look at how to use the php readfile() function through an example.

Example:

<?php
echo readfile("test.txt");
?>

Output:

There are two lines in this file.
This is the last line.
57

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