(PHP 4, PHP 5, PHP 7)
fwrite — д���ļ����ɰ�ȫ���ڶ������ļ���
$handle
, string $string
[, int $length
] ) : int
fwrite() �� string �������
�ļ�ָ�� handle ����
handlestringThe string that is to be written.
length
���ָ����
length�������
length ���ֽڻ���д���� string
�Ժ�д��ͻ�ֹͣ���Ӻ����������������
ע�����������
length
�������� magic_quotes_runtime
����ѡ������ԣ���
string �е�б�߽����ᱻ��ȥ��
fwrite() ����д����ַ��������ִ���ʱ�� FALSE ��
Note:
Writing to a network stream may end before the whole string is written. Return value of fwrite() may be checked:
<?php
function fwrite_stream($fp, $string) {
for ($written = 0; $written < strlen($string); $written += $fwrite) {
$fwrite = fwrite($fp, substr($string, $written));
if ($fwrite === false) {
return $written;
}
}
return $written;
}
?>
Note:
�����ֶ������ļ����ı��ļ���ϵͳ�ϣ��� Windows�� ���ļ�ʱ��fopen() ������ mode ����Ҫ���� 'b'��
Note:
If
handlewas fopen()ed in append mode, fwrite()s are atomic (unless the size ofstringexceeds the filesystem's block size, on some platforms, and as long as the file is on a local filesystem). That is, there is no need to flock() a resource before calling fwrite(); all of the data will be written without interruption.
Note:
If writing twice to the file pointer, then the data will be appended to the end of the file content:
<?php
$fp = fopen('data.txt', 'w');
fwrite($fp, '1');
fwrite($fp, '23');
fclose($fp);
// the content of 'data.txt' is now 123 and not 23!
?>
Example #1 һ���� fwrite() ����
<?php
$filename = 'test.txt';
$somecontent = "�����Щ���ֵ��ļ�\n";
// ��������Ҫȷ���ļ����ڲ��ҿ�д��
if (is_writable($filename)) {
// �������������ǽ�ʹ�����ģʽ��$filename��
// ��ˣ��ļ�ָ�뽫�����ļ���ĩβ��
// �Ǿ��ǵ�����ʹ��fwrite()��ʱ��$somecontent��Ҫд��ĵط���
if (!$handle = fopen($filename, 'a')) {
echo "���ܴ��ļ� $filename";
exit;
}
// ��$somecontentд�뵽���Ǵ��ļ��С�
if (fwrite($handle, $somecontent) === FALSE) {
echo "����д�뵽�ļ� $filename";
exit;
}
echo "�ɹ��ؽ� $somecontent д�뵽�ļ�$filename";
fclose($handle);
} else {
echo "�ļ� $filename ����д";
}
?>