The strcmp comparison result is always not 0.

Php string comparison problem. it looks like it is clear that the strcmp comparison result is never 0. input & nbsp; id value from the page is 1 & nbsp ;, one is that the id value read from the file is 1, which is always different when compared with strcmp. Then, use strlen to test the string length & nbsp; the length of the input 1 is actually 0, php string comparison problem. it looks like it is clear that the strcmp comparison result is always not 0
The input id value from the page is 1,
The id value read from the file is 1.
The length of 1 passed in by strcmp is always different. Then, use strlen to test that the length of 1 passed in is 0, and the length of 1 read from the file is 1. currently, this is caused by inconsistent encoding. but how can I set it? Please advise. thank you.
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Let's take a look at the encoding of your file.
Transformation


Then, let's see what the encoding of your code file is.
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It still depends on the code. it is strange that the length is 0.
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Five yards without the truth, paste the code to see it.
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Confirm that your value is passed in...
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I have encountered before that, when two values appear the same in the page output, false is returned for comparison.
However, my situation is different. The value of my "deterioration" is deteriorated only after packaging and re-unpacking and transmission.
Because the deteriorated value strlen is very long, I use trim () to remove spaces for comparison to return true. the strange LZ is that it is 0 and LZ is used for comparison. use the gettype dump output to see what is different ~
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If the value is not passed in, check it carefully,
If you can, let's take a look at the code,