JavaScript Function isNaN
Small JavaScript function to check if a variable is a number.
Rounding And Displaying Numbers In PHP
To round a number in PHP you can use one of three functions, these are round(), ceil() and floor(). All of these functions take number as the input and will round the value depending on the function used.
To round to the closest integer use the round() function.
Does A String In PHP Contain A Number?
The is_numeric() function in PHP can be used to see if a number contained in a string is numeric. The function returns true is the variable can be parsed into a string, otherwise it returns false. Here are some examples:
Generate A Select Box For A HTML Form
Here is a function to generate a select box for a HTML form. The three parameters are:
Printing Arrays Using print_r()
When debugging PHP code the print_r can be useful if you want to know what an array or object contains. It will take any variable as input and will print off as much information as it can about that variable. The following code.
Linking An RSS Or Atom Feed to a HTML Document
Adding a hyper link for an RSS or Atom feed on your web page works, but that's not all you can do. By adding a link to the head section of the page you can allow your users an alternative method of picking up your feed.
To add an RSS feed use this.