PHP 7.1.18 Released

SplFileObject::fwrite

(PHP 5 >= 5.1.0, PHP 7)

SplFileObject::fwriteWrite to file

说明

public int SplFileObject::fwrite ( string $str [, int $length ] )

Writes the contents of string to the file

参数

str

The string to be written to the file.

length

If the length argument is given, writing will stop after length bytes have been written or the end of string is reached, whichever comes first.

返回值

Returns the number of bytes written, or 0 on error.

范例

Example #1 SplFileObject::fwrite() example

<?php
$file 
= new SplFileObject("fwrite.txt""w");
$written $file->fwrite("12345");
echo 
"Wrote $written bytes to file";
?>

以上例程的输出类似于:

Wrote 5 bytes to file

参见

  • fwrite() - 写入文件(可安全用于二进制文件)

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User Contributed Notes 1 note

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7
bas dot hilbers at tribal-im dot com
4 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 writter by the fwrite method...

Just to let you know!
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