Think if you has a page with data which load data using ajax and edited those data using ajax form. And go to another page using a link there. And click back button again & old data loaded and not loading last edited data. So you have to reload that page when click on back […]
Continue Reading →If you want to empty or truncate a mysql table using codeigniter active record, use the following code. 🙂 To empty $this->db->empty_table(); This will generate a delete SQL string and runs the query. // DELETE FROM mytable To truncate $this->db->from(‘mytable’); $this->db->truncate(); // or $this->db->truncate(‘mytable’); This will generate a truncate SQL string and runs the query. […]
Continue Reading →The easiest way is to use date function, which lets you mix hard-coded values with ones extracted from a timestamp. If you don’t give a timestamp, it assumes the current date and time. <?php // Current timestamp is assumed, so these find first and last day of THIS month $first_day_this_month = date(‘m-01-Y’); // hard-coded ’01’ […]
Continue Reading →Each YouTube video has 4 generated images. They are predictably formatted as follows: http://img.youtube.com/vi/<insert-youtube-video-id-here>/0.jpg http://img.youtube.com/vi/<insert-youtube-video-id-here>/1.jpg http://img.youtube.com/vi/<insert-youtube-video-id-here>/2.jpg http://img.youtube.com/vi/<insert-youtube-video-id-here>/3.jpg The first one in the list is a full size image and others are thumbnail images. The default thumbnail image (ie. one of 1.jpg, 2.jpg, 3.jpg) is: http://img.youtube.com/vi/<insert-youtube-video-id-here>/default.jpg For the high quality version of the thumbnail use a url similar to […]
Continue Reading →If you need to check the checked property of a checkbox and perform an action based on the checked property using jQuery. Here is the way to do it. if ($(‘#isAgeSelected’).is(‘:checked’)) { $(“#txtAge”).show(); } else { $(“#txtAge”).hide(); }
Continue Reading →Q: In jQuery, if you have an element of some kind that you’re hiding and showing, using .hide(), .show() or .toggle(). How do you check if that element is currently hidden or visible on the screen? A: If it refers a single element, this code might be more suitable: $(element).is(“:visible”); Or you can use the […]
Continue Reading →Q: In PHP 5, what is the difference between using self and $this? A: Use $this to refer to the current object. Use self to refer to the current class. In other words, use $this->member for non-static members, use self::$member for static members. I recall that parent::member() is used to call a base class member […]
Continue Reading →Q: What would you recommend using between a datetime and a timestamp field in mysql, and why? A: Generally Timestamps in MySQL used to track changes to records, and are updated every time the record is changed. If you want to store a specific value you should use a datetime field. If you meant that […]
Continue Reading →To find out the IP address of you computer, just go to google and type ‘what is my ip‘ and enter.
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