SplFileObject::fwrite
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplFileObject::fwrite — Write to file
说明
Writes the contents of data
to the file
参数
data
-
The string to be written to the file.
length
-
If the
length
argument is given, writing will stop afterlength
bytes have been written or the end ofdata
is reached, whichever comes first.
返回值
Returns the number of bytes written, or false
on error.
更新日志
版本 | 说明 |
---|---|
7.4.0 |
The function now returns false instead of zero on failure.
|
示例
示例 #1 SplFileObject::fwrite() example
<?php
$file = new SplFileObject("fwrite.txt", "w");
$written = $file->fwrite("12345");
echo "Wrote $written bytes to file";
?>
以上示例的输出类似于:
Wrote 5 bytes to file
+添加备注
用户贡献的备注 1 note
bas dot hilbers at tribal-im dot com ¶
11 years ago
Your \SplFileObject will not throw an exception when trying to write to a non-writeable stream!
I forgot to set the second parameter on my \SplFileObject constructor (the mode), costing me minutes to figure out why nothing was written by the fwrite method...