SplFileObject::fwrite()
(PHP 5 >= 5.1.0, PHP 7)
Write to file
说明
public SplFileObject::fwrite(string $str[,int $length]): int
Writes the contents of$stringto the file
参数
- $str
The string to be written to the file.
- $length
If the$lengthargument is given, writing will stop after$lengthbytes have been written or the end of$stringis reached, whichever comes first.
返回值
Returns the number of bytes written, or 0 on error.
范例
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)
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!