PHP string comparison related issues, it looks like clearly, strcmp comparison results are always not 0

PHP string comparison problem, it looks like clearly, strcmp comparison results are always not 0
An incoming ID value from the page is 1,
One is the ID value read from the file is 1
The use of strcmp comparison is always unequal, and then use strlen to test the length of the string passed in the length of 1 is actually 0, from the file read the 1 length is 1. Now consideration is caused by inconsistent coding, but how to set ah? Please advise, thank you.
------Solution--------------------
You see what your file code is.
Change Kazakhstan


And then look at what your code file encoding is for the transformation ha
------Solution--------------------
Or the code, the length of 0 is odd.
------Solution--------------------
Five yards without the truth, post code to see.
------Solution--------------------
Verify that your values are passed in ...
------Solution--------------------
I've seen it before. Two values in the page output look like the comparison is returned false
But my situation is not the same, my "bad" value is because after a layer of packaging and then unpacking the transmission, only deterioration.
Since the bad value strlen is very long, I will use trim () to remove the space after the comparison to return true. LZ of the more strange Direct is 0 LZ and compare it with GetType dump output to see what is different ~
------Solution--------------------
Is the value not passed over, carefully examined under the look,
If you can, take the code.

