Pc and Web tricks

I like using the same PHP script for both AJAX and non-AJAX content requests. Using one script just makes everything easier because it's only one file to update/edit and it's one more cache-able request. One way to try detect an AJAX request (as opposed to a regular page load) is by using the following PHP code: /* decide what the content should be up here .... */ $content = get_content ( ) ; //generic function; /* AJAX check */ if ( ! empty ( $_SERVER [ 'HTTP_X_REQUESTED_WITH' ] ) && strtolower ( $_SERVER [ 'HTTP_X_REQUESTED_WITH' ] ) == 'xmlhttprequest' ) { /* special ajax here */ die ( $content ) ; } /* not ajax, do more.... */ $_SERVER['HTTP_X_REQUESTED_WITH']  is the golden ticket but not all servers provide this variable so having other checks in place will be important.

CSS doesn’t provide any official way to handle a click event in CSS. But there are some very interesting tricks that we can use to “detect” a click using CSS only, without a single line of JavaScript, and this is what we are going to talk about today. How ot Works ? The HTML 1 2 < input type = "checkbox" > < p class = "to-be-changed" >I'm going to be red! It's gonna be legen... Wait for it...</ p > The CSS 1 2 3 4 5 6 7 .to-be-changed {      color : black ; }   input[type=checkbox]:checked ~ .to-be-changed {      color : red ; } As you can see, it relies on the :checked pseudo-class and on the general sibling selector  ~ . Please note that it also works like a charm with the adjacent sibling selector  + . Basically, it says “if the checkbox is checked, then the following elements with the  .to-be-changed  class will be red”. Okay, a check...