Php null sql

The requirement is, provide a simple button for each project name in the table. The next part of the script contains the dynamic PHP, which provides a list of Bootstrap buttons ; one for each of the returned records from the MySQL database:. Notice the call to empty in the button class attribute. Be sure and check out these 2 posts on storing and retrieving a. I hope through this post, you can find ways to use empty for similar types of functionality where you see fit.

What creative ways have you used empty? Tell me about them in the comments below. Like always, if you see anything in the code I can improve on or correct, please let me know via the comments below. Thank you for taking the time to read this post. Return Values Returns true if value is null , false otherwise.

Notice: Undefined variable: inexistent in Micro optimization isn't worth it. Go optimize something that matters. This is why a variable containing a NULL is considered to be unset: it doesn't have a value.

Setting a variable to NULL is telling it to forget its value without providing a replacement value to remember instead. The variable remains so that you can give it a proper value to remember later; this is especially important when the variable is an array element or object property.

It's a bit of semantic awkwardness to speak of a "null value", but if a variable can exist without having a value, the language and implementation have to have something to represent that situation. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Asked 12 years, 3 months ago. Active 3 years, 5 months ago. Viewed k times. Any Ideas? Improve this question. Im simply printing the checkbox. And its checked if the value is not null. It dosent seem to do that.. Hense it always goes into the first if statment — Angel.

Sry this might sound mean..