This elementary tutorial describes how to search an array to see if a specific item lies in it. In the tutorial, we create an array of strings such as "Apple" and "Orange" then show you how to use PHP to find out that "Apple" is in the array but "Monkey" is not. This can be useful in PHP programs if you have a collection of items (perhaps that a user has entered) and you want to know if a certain item is in that collection.
A function is a block of code which can be called from any point in a script after it has been declared. It is basically a compartmentalized PHP script designed to accomplish a single task. Functions are useful because they contribute to rapid, reliable, error-reducing coding, and increase legibility by tiding up complicated code sequences.
You should encode string values while passing in an querystring. We use UrlEncode to Returns a string in which all non-alphanumeric characters except -_. have been replaced with a percent (%) sign followed by two hex digits and spaces encoded as plus (+) signs.
Array does not have to be a simple list of keys and values; each array element can contain another array as a value, which in turn can hold other arrays as well. This way, you can create a multi-dimensional array. In this article principles of using multidimensional arrays are explained and source code defining multidimensional array and displaying the array values on the web page is given.
This tutorial introduces some of the basic programming skills required if you are going to try and learn to use PHP. We will go over a little about what PHP is and talk about some of the basic styles of programming.
Please understand that this tutorial is part of a series, and may change somewhat in the future, as it is a work in progress. The author trusts that it will be valuable and informative in your learning experience.
It is often necessary to arrange the elements in an array in numerical order from highest to lowest values (descending order) or vice versa (ascending order). If the array contains string values, alphabetical order may be needed. Sorting a one-dimensional arrays is quite easy.
Before you can get content out of your MySQL database, you must know how to establish a connection to MySQL from inside a PHP script. To perform basic queries from within MySQL is very easy. This article will show you how to get up and running.