PHP vfprintf() Function

Last Updated : 25 Aug, 2023

The vfprintf() function is an inbuilt function in PHP that is used to write formatted information to a stream, such as a file or the output screen.

Syntax:

vfprintf(resource $stream, string $format, array $values):

Parameters: This function accepts three parameters that are described below.

$stream: This parameter tells you where you write the string. It could be a file or a standard output like a screen.
$format: This is a template that shows how you want to arrange your data. It contains placeholders (like %d, %s, etc.) that represent where your actual data will go.
$values: This array holds the actual data that will be inserted into the placeholders of the format string.

Return Values: The vfprintf() function returns the count of the character written to the screen. It will return an integer type

Program 1: The following program demonstrates the vfprintf() function.

PHP

<?php  $stream = fopen('./output.txt', 'w'); $values = [10, "Ram"]; $format = "Number: %d, Name: %s\n";     $result = vfprintf($stream, $format, $values);     fclose($stream);     if ($result >= 0) {     echo "Successfully wrote $result characters to the file."; } else {     echo "An error occurred while writing to the file."; }     ?>

Output

Successfully wrote 22 characters to the file.

Program 2: The following program demonstrates the vfprintf() function.

PHP

<?php  $stream = fopen('php://stdout', 'w');  $values = ["Hello", "GPT-3.5", 2023]; $format = "Hello Geeks for Geeks .\n";      $result = vfprintf($stream, $format, $values);      if ($result >= 0) {     echo "Successfully wrote $result characters to the screen."; } else {     echo "An error occurred while writing to the screen."; }      fclose($stream);  ?>

Output

Hello Geeks for Geeks .  Successfully wrote 24 characters to the screen.

Reference: https://www.php.net/manual/en/function.vfprintf.php

PHP sprintf() Function

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