如何测试PHP中的文件写入是否成功？

Question

Is there any way to test if writing to a file was successfully accomplished? I need a method to obtain the end of time of a writing operation. If so to trigger a callback function.

Answer 1

fwrite() returns the number of bytes written, or FALSE on error.

Check whether fwrite() returns false and you'll know that the write succeeded. Be careful to use the === comparison operator instead of the == operator when checking if the returned value is false.

You can use filemtime() to get the last modification time of a file.