Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Javascript, PhP and SEO Impact?
-
What are the Pro's and Con's of using Java Script and PHP in a site when factoring in SEO?
-
Alan's answer is spot on.
Avoid javaScript or carefully follow best-practices so Google can crawl all content without reading javaScript. Alan is exactly right when he said: never count on Google crawling through your JavaScript to find content, but also never count on being able to hide anything from Google via JavaScript.
Whether you use PHP or not is not directly relevant. PHP is executed server-side, so Google never sees your PHP code and doesn't care. What matters is whether your programmer writes PHP code that will generate search friendly HTML code, url structure, etc.
-
JavaScript is one of several technologies that offers severe limitations in search engines and their ability to properly see content, then just as important but often overlooked, properly and cleanly evaluate that content from an SEO perspective.
Specific considerations:
- Google does a "fair" job at discovering content passed through JavaScript (either on-page or at the code level)
- A "fair" job means it's hit and miss as to whether their system can actually find that content
- Whatever content the Google system CAN find via JavaScript is NOT necessarily able to be used to properly evaluate content intent, focus or relationship to other content
So - the best practices recommendation is if you want/need content to be found and properly evaluated by Google (or Bing) do NOT pass it through JavaScript.
And also, if you want to HIDE content from Google, don't assume you can successfully do so via JavaScript either.
As for PHP, its the most widely adopted and utilized web programming language out there. The language by itself is essentially SEO neutral. It's all in how a programmer utilized PHP that matters. In the hands of a programmer that either truly understands SEO or collaborates closely with an SEO expert (who also understands the limitations/pitfalls that can arise with "bad" (SEO-unfriendly) PHP coding, it's a great language.
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
How do elements that are displayed when scrolled impact SEO?
Hi, We are wanting to implement Animate.css and Wowjs on our site and were concerned about the SEO impacts. Basically when the page is loaded, if the element is not within the viewport then the HTML tag (i.e. div tag) have a style="visibility: hidden" and once the element is within the viewport it will change to have style="visibility: visible". Would having the style="visibility: hidden" negatively impact SEO?
Web Design | | KendallHershey0 -
Migration from HTML to Wordpress - SEO Implications?
I am in the process of having a wordpress site developed to replace my current HTML site. (I currently have my website in html and a blog in wordpress in a sub directory). I am doing this in phases to try and preserve as much of my good rankings as possible. My first phase is to replicate my site with the exact same pages, meta data, and site structure. I'm hoping that google will see this as not much change and not change my rankings for the worse. I also made it a goal that my site speed tests be at least equal to what they are now. We will have to 301 all of the URLs however since it will be going from /example.html to /example. I believe my blog will also need to move into the root directory as well, so I need to 301 all of those pages. I plan to wait a couple months for Phase 2. Phase 2 involves replacing old content (photo galleries), and introducing new content (virtual tours, videos, new pages, etc.) One of my reasons for moving to wordpress is to keep up with current trends a little easier since I have very little time. (I am owner, website maintainer, SEO - all on my own). My question here is three parts. 1. Do you think this strategy will work to preserve my current rankings? 2. Do you have any lessons learned or advice to share with me to make this as smooth as possible? 3. Do I really need to wait to add new content? I might get antsy and want to do it sooner! 🙂 Thank you in advance!
Web Design | | CalicoKitty20000 -
Fixing Render Blocking Javascript and CSS in the Above-the-fold content
We don't have a responsive design site yet, and our mobile site is built through Dudamobile. I know it's not the best, but I'm trying to do whatever we can until we get around to redesigning it. Is there anything I can do about the following Page Speed Insight errors or are they just a function of using Dudamobile? Eliminate render-blocking JavaScript and CSS in above-the-fold content Your page has 3 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.Remove render-blocking JavaScript: http://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js http://mobile.dudamobile.com/…ckage.min.js?version=2015-04-02T13:36:04 http://mobile.dudamobile.com/…pts/blogs.js?version=2015-04-02T13:36:04 Optimize CSS Delivery of the following: http://fonts.googleapis.com/…:400|Great+Vibes|Signika:400,300,600,700 http://mobile.dudamobile.com/…ont-pack.css?version=2015-04-02T13:36:04 http://mobile.dudamobile.com/…kage.min.css?version=2015-04-02T13:36:04 http://irp-cdn.multiscreensite.com/kempruge/files/kempruge_0.min.css?v=6 http://irp-cdn.multiscreensite.com/…mpruge/files/kempruge_home_0.min.css?v=6 Thanks for any tips, Ruben
Web Design | | KempRugeLawGroup0 -
Help with error: Not Found The requested URL /java/backlinker.php was not found on this server.
Hi all, We got this error for almost a month now. Until now we were outsourcing the webdesign and optimization, and now we are doing it in house, and the previous company did not gave us all the information we should know. And we've been trying to find this error and fix it with no result. Have you encounter this issue before? Did anyone found or knows a solution? Also would this affect our website in terms of SEO and in general. Would be very grateful to hear from you. Many thanks. Here is what appears on the bottom of the site( www.manvanlondon.co.uk) Not Found The requested URL /java/backlinker.php was not found on this server. <address>Apache/2.4.7 (Ubuntu) Server at 01adserver.com Port 80</address> <address> </address> <address> </address>
Web Design | | monicapopa0 -
How to know if a wordpress theme is coded correctly for Seo
Hi, So I am curious if there is a tool to see if a site is coed properly for Google? I am running Avada, a standalone theme, yet I am also using a cache plugin. But when I search my code, its all like on one huge line. So I am curious if there is a way to verify or check if a theme is coded correctly? Thank you
Web Design | | Berner1 -
Confluence and SEO
I think this is a difficult question so apologies in advance and any help would be appreciated! We currently have a large amount of support center content sitting on our main pages which we don’t think is very effective (mainly basic how to guides). We think it is difficult for visitors to understand and the UI is very poor. In order to solve this we’re currently moving this content onto a subdomain using Confluence, a wiki based team collaboration tool (from a company called Atlassian). What we’re planning on doing is very much like what Atlassian themselves have done on this page: https://confluence.atlassian.com/display/ALLDOC/Atlassian+Documentation What are the SEO issues / dangers that I need to consider before moving this content? I’m assuming that as this content will still be on the same domain then we can minimise link equity / authority loss by setting up re-directs to the new content. Also, has anyone had any experience of using Confluence and whether individual pages can be optimised for SEO? I notice that there are lots of add-ins that can be used, one of which is an SEO add-on which allows you to customise things like meta description tags.
Web Design | | RG_SEO0 -
White Text / Black Background & SEO Impact
Does anyone know of any testing / studies with evidence that Google prefers dark text on a light background vs. light text on a dark background? I have a website that currently has light text on a black background, and really like the way it looks, but am concerned that the style may be hurting SEO. Moreover, redesigning something inverse with the same quality would be a large project and fairly costly, so I'd like to make sure the benefit will really be worth the cost before moving forward.
Web Design | | Bromtec0 -
Yes or No for Ampersand "&" in SEO URLs
Hi Mozzers I would like to know how crawlers see the ampersand (& or &) in your URLs and if Google frown upon this or not? As far as I know they purely recognise this as "and" is this correct and is there any best practice for implementing this, as I know a lot of people complained before about & in links and that it is better to use it as &, but this is not on links, this is on URLs. Reason for this is that we looking to move onto an ASP.Net MVC framework (any suggestions for a different framework are welcome, we still just planning out future development) and in order to make use of the filter options we have on our site we need a parameter to indicate the difference on a routing level (routing sends to controller, controller sends to model, model sends to controller and controller sends to view < this is pattern of a request that comes in on the framework we will be using). I already have -'s and /'s in the URLs (which is for my SEO structuring) so these syntax can't be used for identifying filters the user clicks or uses to define their search as it will create a complete mess in the system. Now we looking at & to say; OK, when a user lands on /accommodation and they selects De Kelders (which is a destination in our area) the page will be /accommodation/de-kelders on this page they can define their search further to say they are looking for 5 star accommodation and it should be close to the beach, this is where the routing needs some guidance and we looking to have it as follow: /accommodation/de-kelders/5-star&close-to-the-beach. Now, does the "&" get identified by search engines on a URL level as "and" and does this cause any issues with crawling or indexation or would it be best to look at another solution? Thanks, Chris Captivate
Web Design | | DROIDSTERS0