fprintf
PHP function
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(PHP 5, PHP 7, PHP 8)
Write a formatted string to a stream
Description
fprintf(resource $stream, string $format, mixed ...$values): int
Write a string produced according to format to the stream resource specified by stream.
Parameters
streamPointer
values
Return Values
Returns the length of the string written.
Errors/Exceptions Sprintf
Changelog Sprintf
Examples
fprintf(): zero-padded integers
php
<?php
if (!($fp = fopen('date.txt', 'w'))) {
return;
}
$year = 2005;
$month = 5;
$day = 6;
fprintf($fp, "%04d-%02d-%02d", $year, $month, $day);
// will write the formatted ISO date to date.txt
?>fprintf(): formatting currency
php
<?php
if (!($fp = fopen('currency.txt', 'w'))) {
return;
}
$money1 = 68.75;
$money2 = 54.35;
$money = $money1 + $money2;
// echo $money will output "123.1";
$len = fprintf($fp, '%01.2f', $money);
// will write "123.10" to currency.txt
echo "wrote $len bytes to currency.txt";
// use the return value of fprintf to determine how many bytes we wrote
?>