After the php value is transferred, the database cannot be found.

Source: Internet
Author: User
After passing the php value, you cannot find the database and create a simple student management system & nbsp; & lt;/select & gt; & nbsp; & nbsp; major: & lt; select & nbsp; name = "pro" & gt; & nbsp; the database cannot be found after the & nbsp php value is passed
A simple student management system
Major:
Computer Science and Technology
Network Engineering
Financial Management
All
Options above
Here is the database search
If ($ pro! = "All ")
{
$ Query = "select * from s where pro = $ pro ";
}
Why can't I find a matching value in the database?
The system prompts that query is null.
This data already exists in the database
------ Solution --------------------
At least.
$ Query = "select * from s where pro = '$ Pro '";

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.