Here are 2 ways which you can use whenever you need to center a column div within `.container` in Twitter Bootstrap 3 as well as to keep empty space outside the `div` to be evenly distributed. First approach uses offset feature available in Bootstrap while it has a limitation and second approach is using `center-block` class with setting `float: none` in Twitter Bootstrap.
Have you ever used a function call in `empty()` for an `if` condition to perform some checking? Then you might come up with an PHP fatal error saying Can’t use method return value in write context. I am explaining here why did the error come and 2 ways to write them correctly.
When a page contains a large amount of content, the footer is pushed down off the viewport, and if you scroll down, the page ‘ends’ at the footer. However, If the page has small amount of content, the footer can sometimes ‘cling’ to the bottom of the content, floating halfway down the page, and leaving a blank space underneath, which looks ugly. So we need to make the footer stick to the bottom of page (not always fixed and visible).
Selecting element with two or more attributes in your html page is not a trivial task. It’s just a very simple line of jQuery selector when it comes to select element with multiple attributes. So let us see what is that.
In MySQL we create tables and build relationship among them. In the process if we need to truncate foreign key constrained table then we can’t do it simply and MySQL will throw an error even we have already removed table having foreign key constraint:
ERROR 1701 (42000): Cannot truncate a table referenced in a foreign key constraint…
In PHP we either create objects and their array, or database returns array of objects as result-set of some query. There we might need to find an object which have a particular property-value pair. There is no direct function available in PHP to perform the same so I’m explaining here how can we find object by value in array of objects by using a foreach loop.
While working with fancybox, you might have noticed that any button or link or input inside fancybox popup just behaves like previous/next item slider, making that coming item to appear in popup rather of doing it’s assigned code on click. All the reason is the width specified for `fancybox-nav` class with higher `z-index` for it.
Sometimes we create MySQL tables which don’t contain auto increment primary key column instead they may have unique key or combination of unique indexes. In such tables we wish to insert a new row if primary/unique key or keys combination doesn’t exists and update record if exists.