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vfprintf
Write a formatted string to a stream
(PHP 5)
int vfprintf ( resource handle, string format, array args )
Write a string produced according to format to the stream resource specified by handle.
Operates as fprintf() but accepts an array of arguments, rather than a variable number of arguments.
Examples
Example 2484. vfprintf(): zero-padded integers
<?php
if (!($fp = fopen('date.txt', 'w')))
return;
vfprintf($fp, "%04d-%02d-%02d", array($year, $month, $day));
// will write the formatted ISO date to date.txt
?>