PHP login verification time code problems

In the PHP login verification time code, the problematic user name and account are stored in the txt text, that is, the password cannot be verified. I have tried to verify the user name separately and I don't know where it is wrong .. $ Logi & nbsp ;=& nbsp; file & nbsp; (& nbsp; "users.txt" & nbsp;); & nbsp; PHP logon verification error code
The user name and account are stored in the txt text, that is, the password cannot be verified. I have tried to verify the user name separately. I do not know what is wrong ..
$ Logi = file ("users.txt ");

$ Size = sizeof ($ Logi );

Foreach ($ Logi as $ Key => $ Val)
{$ Data [$ Key] = explode ("|", $ Val );}

For ($ K = 0; $ K <$ size; $ K ++)
{
$ User = $ Data [$ K] [0];
$ Pass = $ Data [$ K] [1];
If ($ user === _ POST ["user"] & $ pass == _ POST ["pass"])
{
Echo "success ";
}
Else echo "No ";
} Php
------ Solution --------------------
Add an rtrim () function
$ Data [$ Key] = rtrim ($ Data [$ Key]);
Because each row read by the file () function includes line breaks