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One of the major reasons for using a server-side language such as PHP is for the ability to generate dynamic content. Often this will lead to single scripts that produce their content based on the input parameters (that is, the variables in the URL).
This article covers various techniques and methods for representing these parameters in the URL in a clean and "friendly" manner, as well as then how to read the parameters.
Geocoding is the process of finding the longitude and latitude of a given address or location. The Google Maps service gives developers and web site owners free access to their geocoder, both using the Google Maps JavaScript API, as well as using the web service. In this article I will show you how to access the geocoder web service using PHP so that it can be used in your own applications.
Smarty is a very powerful template engine for PHP that allows developers to extend its capabilities using custom plug-ins. There are several different types of plug-ins, each of which serves a different purpose. In this article we will look at how the block plug-in type works.
This article discusses a simple technique to remind users to submit a form on your web site before navigating to another page. This is especially useful for long forms where the submit button may be hidden at the bottom of the page, or when editing content in a content management system. The technique described in this article uses JavaScript and works in modern browsers such as Internet Explorer, Firefox and Safari.
Because of the limitations of HTTP, it is difficult to monitor the status of files as they are uploaded via HTML forms. While other programming languages have built-in methods to monitor file uploads, PHP does not. This article shows how to implement such a solution in PHP. We will use Ajax to retrieve information about a file as it is being uploaded and display the progress back to the user.
This article takes a look at separating application logic from template logic. We will use the Smarty Template Engine as the basis for the article and its examples.
This article covers the implementation of a fulltext search engine using PHP 5 and the Zend Framework. We will be using the Zend_Search_Lucene component to create and search our fulltext index.
You might have been in a situation before where you had a list of items in your database that needed to be output in a specific order. These items could be anything: perhaps a listing of your favourite movies or your favourite books. For whatever reason, you want them ordered in a custom way that can't be determined automatically (such as alphabetical).
This article covers the implementation of a system that lets you easily define the order of such a list.
There will be many situations when creating web forms, that either you cannot accept all data on one page, either because certain responses result in a different set of subsequent questions, or because you form is so long that you need to split it up into multiple pages. The case could even be that you have a 1 page form, but you want to show confirmation of the form data prior to processing the data (e.g. showing a user their order before processing their credit card).
This tutorial covers how to implement such forms using PHP. This will include covering the various issues that need to be taken into consideration, as well as a class to help build such forms. Finally, there will be real-world example of implementing a multi-page form using the class.
Many people think of the Smarty Template Engine as a system for separating presentation from application logic. This is indeed true, but many people also only consider Smarty for outputting their web site HTML/XHTML. This brief article goes over other situations where Smarty may be useful in your PHP application.
DatabaseObject is a class I wrote three or four years ago, as a way of easily manipulating database data. It is not a replacement for a database abstraction class. In fact, it works very nicely with a database abstraction class, however, the version we have provided uses the native PHP PostgreSQL and MySQL database calls.
In most modern relational databases there is support for concurrent operations. PostgreSQL is no different.
While concurrency can drastically improve the performance of your application it also has many different implications to thread safety.
For those of you who are not familiar with thread safety in general terms; thread safety is the process of ensuring that two threads cannot do the same operation at the same time.
The following article discusses transaction control and table locking in PostgreSQL and is intended for an advanced audience.
This short series of articles provides a few simple techniques for protecting yourself and your web site from spammers. It does this from two perspectives:
1. Protecting people (including yourself) who post to your web site from being spammed
2. Protecting your web site from being spammed (for example, blog spam)
This is the second article in the series, and covers the issue of protecting your web site from spammers.
This article covers how to implement a system such as Google Suggest using JavaScript, CSS and PHP.
To aid us in this process we will be using AjaxAC, an open-source framework written in PHP used to develop AJAX style applications.
We will be implementing a clone of this application, from start to finish. This begins with setting up our frontend HTML file and CSS styles, creating our AjaxAC GoogleSuggestCloneJax application, and then linking it all together.
This article covers performing search queries on Google using their API. This means you can transparently run a Google search in the background, and then present the results to your users however you want to.
The Google API is a SOAP web service. SOAP (Simple Object Access Protocol) is an XML schema used for calling a remote procedures (usually) over the web. In this case, the remote procedure is Google search.
In this article, we are going to create a single PHP script called google.php, to simply demonstrate how to query Google. Hopefully using this information, you will be able to come up with more advanced ways of using the API.
This article is an introduction to using the blob column type in MySQL. The concept is introduced by familiarising users with uploading and storing images in a MySQL table.
This article is an introduction to using sessions in PHP.
This short series of articles provides a few simple techniques for protecting yourself and your web site from spammers. It does this from two perspectives:
1. Protecting people (including yourself) who post to your web site from being spammed
2. Protecting your web site from being spammed (for example, blog spam)
Since creating the second part of the Nested Tree series, I've done further work on the nested tree class.
This appendix article is not officially part of the "3 part series", but it is an addon article which may be continually updated with new ideas and snippets to include in the Nested Tree class. The reason these have been kept separate is because they are not core to the concept of implementing nested trees in your web site.
This series of articles is about implementing a nested tree using PHP and PostgreSQL.
This article - part 2 - covers the implementation of managing nested trees in PHP. The data we learned how to store in SQL in part 1 must be extracted somehow.
In this article, we will create a class used to extract data from the tree and to rebuild the tree. Each portion of the class will be developed separately, then all combined into a single class.
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