• 首页
  • vue
  • TypeScript
  • JavaScript
  • scss
  • css3
  • html5
  • php
  • MySQL
  • redis
  • jQuery
  • SplFileObject::fwrite()

    (PHP 5 >= 5.1.0, PHP 7)

    Write to file

    说明

    publicSplFileObject::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!