I have previously talked about rounding numbers in PHP, but what if you wanted to round the number to the nearest thousand?
Reading or writing a file using PHP is quite a common practice, but it can often fall cause programs to fall flat on their face if the proper user privileges are not in place. Although this is not a problem on Windows machines due to the lack of a proper security model, but on Linux machines you need to make sure your scripts can run with the correct permissions.
Creating a new Draggable object with the script.aculo.us framework is easy. You just create a new instance of the Draggable object with the element id to be made draggable as the first parameter and a set of options as the second.
Here is a function to create a group of radio buttons in a HTML form. The three parameters are:
MySQL uses the datatype TINYINT to store boolean values. MySQL stores the value as TINYINT(1) which is the same as a bit so the value is either 0 (false) or 1 (true). Using boolean fields can be very useful, but it can be costly in processing as to change the value you have to query the database, find out the value of the field and then act accordingly.
Here is a simple MySQL query that can be used to toggle the value already present in the TINYINT field without having to do any pre-querying.
It is very easy to break a program with a simple typo. Instead of typing == when comparing two values you type = and actually assign a variable. This is an easy way to introduce a bug as you will not always notice it until your program doesn't work. There is an easy way of avoiding this.
By using the following syntax:
To get the length of a string use the length variable. This returns the number of characters in a string.
- var str = 'abcdef';
- str.length; // returns 6
The charAt function will return the character at the point specified in the parameter. So to get the first character of a string use: