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vfprintf

PHP function Edit on GitHub ✎

(PHP 5, PHP 7, PHP 8)

Write a formatted string to a stream

Description

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

Write a string produced according to format to the stream resource specified by stream.

Operates as fprintf() but accepts an array of arguments, rather than a variable number of arguments.

Parameters

stream
values

Return Values

Returns the length of the outputted string.

Errors/Exceptions Vsprintf

Changelog Vsprintf

Examples

vfprintf(): zero-padded integers

php

<?php
if (!($fp = fopen('date.txt', 'w')))
    return;

$year = 2025;
$month = 5;
$day = 6;
vfprintf($fp, "%04d-%02d-%02d", array($year, $month, $day));
// will write the formatted ISO date to date.txt
?>