PHP link directories are reservoirs of listed links so that you need to move in a few directory directions to find several hundreds of links, instead of moving in all directions, from one site to another with links scattered all over the net. It is a neat solution to the age-old problem of getting traffic to your site. It will do well to touch on the work these sites do as well as the use of a script and also site optimization, the crux of the matter.
A PHP link directory is a software webmasters use all over the world to organize their links, articles, and other data lists. In other words, it is a reservoir of lists and link building resources that you can tap to find good links for your site. If you get your site listed in a php link directory, you will get a lot more unique visitors to your site.
Search engines value these directories that house thousands of links under hundreds of categories, especially so, when submissions are manually checked for search engine optimization prerequisites.
You can also advertise on link directories; just research their background and find out about: how long they have been in existence, their page rank, number of unique visits, and page views per month. So bring your ads to where the traffic is!
A good link directory script enables the editor to be a gate-keeper to keep out dubious sites. This means you will get truly targeted traffic as a free directory service. Further, a directory script offers 3 money-making opportunities. If you install it on your site, it becomes a top quality money-making link directory site. Besides, it can be used as an advertising platform for banner ads, text ads, affiliate ads and Google AdWords of your products, other sites and web scripts.
Site optimization is the name of the game. If your site is properly optimized with keywords in the domain name, it gets links, If you use link-building services, especially the paid ones, you will certainly get guaranteed traffic. However why not try a free directory submission of your url and find out to what extent you can succeed using such tools?