Php/docs/splfileobject.fwrite

• PHP Manual
• SplFileObject
• Write to file

SplFileObject::fwrite

(PHP 5 >= 5.1.0, PHP 7)

SplFileObject::fwrite — Write to file

说明

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

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 false on error.

更新日志

版本	说明
7.4.0	The function now returns false instead of zero on failure.

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）