php - Is it possible to change image filename in every page? -

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i have website used ads listings backpage , craigslist.

i have inserted banner ad on every sidebar on every city: example banner image filename is

myimage.jpg

now want happen is: whenever visit city (for example mysite.com/boston), want filename this:

src="myimage-boston.jpg"

and when visit

mysite.com/birmingham

the image filename be

src="myimage-birmingham.jpg"

i'm doing seo purposes. hope i've explained well. thank in advance :) btw im using codeigniter.

googlebot couldn't crawl url because points non-existent page. generally, 404s don't harm site's performance in search, can use them improve user experience.


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