Verify the last six php IDS

Verify the last six php IDS

In the submission form, I have one of the six digits after the ID card is submitted. How can I write this? That is, the last six digits of the ID card are already in the file. The next step can be performed only when the ID card is entered correctly!

Thank you !!!!!

Let me answer




D8888D reply content -------------------------------------------------------
Just take the last six digits and match them.
For details, refer to the string functions in the manual.

If(substr(fgets(fopen('idcard.txt ', 'R'),-6) == _ POST ['id _ suffix']) {

Echo 'matched ';

} Else {

Echo 'mismatched ';

}


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D8888D reply content -------------------------------------------------------
The two are the same soon.

D8888D reply content -------------------------------------------------------
Actually, I cannot express it clearly. I have already solved it. Thank you!