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
-
Any risks involved in removing a sub-domain from search index or completely taking down? Ranking impact?
Hi all, One of our sub-domains has thousands of indexed pages but traffic is very less and irrelevant. There are links between this sub-domain to other sub domains of ours. We are planning to take this subdomain completely. What happens if so? Google responds for this with a ranking change? Thanks
Web Design | | vtmoz0 -
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 -
Best SEO practice - Umbrella brand with several domains
Hi, we have several blogs and comparison sites on specific topics. All the domains rank on top positions in very competitive niche markets. We think that we can get more profit out of the domains when we put them under an umbrella brand. Customers that visit domain A can then also find products easily on domain B. We see this for example on health.com, with several brands in the top. To maintain or improve our rankings i'm looking for specific information for the link structure. For example, is it better to have the 'about us'/rel=author on each domain, with contributors on that specific domain or is it better to have them all in the (umbrella) brand domain. At the moment we have the structure like this: domainA.com, domainA.com/blog, domainA.com/about-us and domainB.com, domainB.com/blog, domainB.com/about-us. I think to maintain the rankings it is best to keep specific content (like blog/ about us) on the domain. So is it the best to just do side wide links with a logo (like health.com) and what about hosting? We work with wordpress, so all domains will be hosted on one ip? when we use the multiple site option of WP? All information on this topic is more than welcome 🙂
Web Design | | remkoallertz0 -
Do pull quotes affect SEO positively or negatively?
I like the design element of a pull quote to ad interest and highlight an important point. If I use an exact quote from the page in a pull quote on that page, does that negatively affect SEO as duplicate content? Are there formatting or tagging methods that could help pull quotes to boost SEO? For clarity, by "pull quote" I mean a stylized bit of text that floats on a page in such a way that the body text wraps around it. It is actual text (not text embedded in a graphic) but it behaves like an image with text wrapping around it. Here's an example (in red on the right side): http://www.21ct.com/resources/news-room/21ct-announces-its-latest-us-patent-for-advancing-big-data-security/
Web Design | | kyle21ct0 -
SEO Issues From Image Hotlinking?
I have a client who is hotlinking their images from one of their domains. I'm assuming the images were originally stored on the first domain (let's call it SiteA.com) and when they were putting together SiteB.com, they decided to just link to the images directly on SiteA.com instead of moving the images to Site B. Essentially hotlinking. Site A is not using the images in any way and in essence is just a gateway for their other sites and in this case a storage for their images. It doesn't use those images at all, so it really doesn't get any benefits of the images being referenced since I read that Google sometimes counts that hotlinking as a "vote" for the original image. But again, since ite A doesn't use the images that are being hotlinked at all, there's no benefit for Site A. My concern is that it's affecting their SEO for Site B because it makes it look like Site B is simply scraping data by hotlinking those images from Site A. Their programmer suggested creating a virtual directory so that it "looked" like it was coming from Site B. My guess is that Google can see this, so then not only will it look like Site B is scaping/hotlinking images, but also trying to hide it which may send up red flags to Google. My suggesstion to them was to just upload the images correctly into their own images directory on Site B. They own the images, so there's not any copyright issue, but that if they want proper SEO credit for that content, it all needs to be housed on the correct server and not hotlinked. Am I correct in this or will the virtual directory serve just as well?
Web Design | | GeorgiaSEOServices1 -
CSS vs Javascript vs JQuery drop down navigation
For a user / seo perspective, what is the best way to code a drop down menu nav bar? Is it best to use css, javascript or a scripting library like jquery? I am thinking about overall best practice that will not have a negative impact on serps. I am also thinking about what will work best on all types of devices i.e. desk tops, lap tops, smart phones and tablets. What are the Pro's & Cons of Using CSS for Drop Down Menus. What are the Pro's & cons of using Javascript for drop down menus. And the same question for jquery. Thank you all in advance for your ideas.
Web Design | | bronxpad0 -
Live Text in Navigation Vs. Image - Does this affect SEO
I recently was asked the question if having live text in the navigation vs and image affect seo. For example, refer to this link http://markup.io/v/avsaenq856kw the navigation highlighted is seperate images. The html elements read : /images/procedures.png"> Live text html reads like this: Breast » What is better for seo value, or does it now matter having live text or an image?
Web Design | | Red_Spot_Interactive0 -
Combining web pages and it's affects on SEO?
We are looking into amending a website we are working on to try and combine 2 or 3 current pages onto one page. This site is similar to an estate agents site and currently has images, map, floor plan sub pages etc. Can anyone tell me, if we were to combine these pages and include the above details on one page, how that would affect the current search engine rankings?
Web Design | | SoundinTheory0