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This people may be very rare, write their own fun.

if ($page _num > 1) {echo ' next page ';}

And

if ($page _num > 1) {                $page _num++;echo ' next page ';}

Why do you use PHP and MySQL to turn pages, why the first one is useful, and the second page down to the second one is useless?
Even if the second one is used

$page _num + = 1;

It's also ineffective.

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This people may be very rare, write their own fun.

if ($page _num > 1) {echo ' next page ';}

And

if ($page _num > 1) {                $page _num++;echo ' next page ';}

Why do you use PHP and MySQL to turn pages, why the first one is useful, and the second page down to the second one is useless?
Even if the second one is used

$page _num + = 1;

It's also ineffective.

Please send the complete code here. I think your implementation of this is not elegant ...

$page _num++ has in-place modified Page_num, $page _num + 1 No. Would it be easy to understand the code you're assembling?

Addl $, Page_num

This is Page_num + +

MOVL Page_num,%EAXADDL $%eax

This is page_num + = 1, page_num memory value is not changed, but is copied to the EAX register, and then in the EAX register +1 output.

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