Linux-ThinkPHP3.2.3 what does this error mean?

What does indexusersignin.html mean when indexusersignin.html returns a signi error for the usercontroller of indexbench? ----------------------------------------- I am a split line ------------------------------------------- vim to see this WriteHtmlCac...

When you access the signi method of the user controller of the Index module, index/user/signin.html
What does this error mean?

----------------------------------------- I am a split line -----------------------------------------

Vim looks at WriteHtmlCacheBehavior. class. php. Why are the following 'garbled 'characters added at the beginning '?
The first row of this file is namespace Behavior;
Is ThinkPHP reporting this error?
Are these codes actually in this file, even though I have seen these codes in vim on linux.

----------------------------------------- I am a split line -----------------------------------------
Stat WriteHtmlCacheBehavior. class. php
File: 'writehtmlcachebehavior. class. php'
Size: 13551 Blocks: 32 IO Block: 4096 regular file
Device: ca11h/51729d Inode: 507923 Links: 1
Access: (0644/-rw-r --) Uid: (48/apache) Gid: (48/apache)
Access: 22:44:14. 000000000 + 0800
Modify: 18:58:34. 000000000 + 0800
Change: 20:51:40. 000000000 + 0800

How can I find out who modified this file at this time point, Change: 20:51:40. 000000000 + 0800?

Reply content:

When you access the signi method of the user controller of the Index module, index/user/signin.html
What does this error mean?

----------------------------------------- I am a split line -----------------------------------------

Vim looks at WriteHtmlCacheBehavior. class. php. Why are the following 'garbled 'characters added at the beginning '?
The first row of this file is namespace Behavior;
Is ThinkPHP reporting this error?
Are these codes actually in this file, even though I have seen these codes in vim on linux.

----------------------------------------- I am a split line -----------------------------------------
Stat WriteHtmlCacheBehavior. class. php
File: 'writehtmlcachebehavior. class. php'
Size: 13551 Blocks: 32 IO Block: 4096 regular file
Device: ca11h/51729d Inode: 507923 Links: 1
Access: (0644/-rw-r --) Uid: (48/apache) Gid: (48/apache)
Access: 22:44:14. 000000000 + 0800
Modify: 18:58:34. 000000000 + 0800
Change: 20:51:40. 000000000 + 0800

How can I find out who modified this file at this time point, Change: 20:51:40. 000000000 + 0800?

The namespace must start

$ A = 1;
Namespace xxxx;

This form is not acceptable.