How do I write conditional PHP if statements to change image dependant on selections

I'm a newbie to PHP and need to write some code to swap an image out. What I am doing is building a "Build & Price" script. The product has several options and multiple combinations. I have images of all the different possible combinations. I need the script to show a default image at the start, then depending on the options selected from form inputs (radio buttons and checkboxes)... it would change the image to show the appropriate options selected.

Can someone show me how to write this code?

Here are the conditions... the quotes after the if are the id's for the radio and checkbox inputs. The inside brackets () is the image that needs to be shown. First line is the dafault image.

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if default-image ('/images/build/Black/BLBA.jpg')
 
if 'gr-1' ('/images/build/Black/BLBA.jpg')

if 'gr-1' & 'awn-blue' ('/images/build/Black/BLBA.jpg')

if 'gr-1' & 'awn-blue' & 'opt-genbask' ('/images/build/Black/BLBABA.jpg')

if 'gr-1' & 'opt-genbask' ('/images/build/Black/BLBABA.jpg')

if 'gr-1' & 'awn-blue' & 'opt-king' ('/images/build/Black/BLBAKD.jpg')

if 'gr-1' & 'opt-king' ('/images/build/Black/BLBAKD.jpg')

if 'gr-1' & 'awn-blue' & 'opt-genbask' & 'opt-king' ('/images/build/Black/BLBAKDBA.jpg')

if 'gr-1' & 'opt-genbask' & 'opt-king' ('/images/build/Black/BLBAKDBA.jpg')

if 'gr-1' & 'awn-blue' & 'opt-king' & 'opt-solar' ('/images/build/Black/BLBAKDSO.jpg')

if 'gr-1' & 'opt-king' & 'opt-solar' ('/images/build/Black/BLBAKDSO.jpg')

if 'gr-1' & 'awn-blue' & 'opt-king' & 'opt-solar' & 'opt-genbask' ('/images/build/Black/BLBAKDSO.jpg')

if 'gr-1' & 'opt-king' & 'opt-solar' & 'opt-genbask' ('/images/build/Black/BLBAKDSOBA.jpg')

if 'gr-1' & 'awn-blue' & 'opt-solar' ('/images/build/Black/BLBASO.jpg')

if 'gr-1' & 'opt-solar' ('/images/build/Black/BLBASO.jpg')

if 'gr-1' & 'awn-blue' & 'opt-solar' & 'opt-genbask' ('/images/build/Black/BLBASOBA.jpg')

if 'gr-1' & 'opt-solar' & 'opt-genbask' ('/images/build/Black/BLBASOBA.jpg')
 
if 'gr-1' & 'awn-gray' ('/images/build/Black/BLGA.jpg')

if 'gr-1' & 'awn-gray' & 'opt-genbask' ('/images/build/Black/BLGABA.jpg')

if 'gr-1' & 'awn-gray' & 'opt-king' ('/images/build/Black/BLGAKD.jpg')

if 'gr-1' & 'awn-gray' & 'opt-genbask' & 'opt-king' ('/images/build/Black/BLGAKDBA.jpg')

if 'gr-1' & 'awn-gray' & 'opt-king' & 'opt-solar' ('/images/build/Black/BLGAKDSO.jpg')

if 'gr-1' & 'awn-gray' & 'opt-king' & 'opt-solar' & 'opt-genbask' ('/images/build/Black/BLGAKDSOBA.jpg')

if 'gr-1' & 'awn-gray' & 'opt-solar' ('/images/build/Black/BLGAKDSO.jpg')

if 'gr-1' & 'awn-gray' & 'opt-solar' & 'opt-genbask' ('/images/build/Black/BLGASOBA.jpg')
 
if 'gr-2' ('/images/build/Black2/BLBA.jpg')

if 'gr-2' & 'awn-blue' ('/images/build/Black2/BLBA.jpg')

if 'gr-2' & 'awn-blue' & 'opt-genbask' ('/images/build/Black2/BLBABA.jpg')

if 'gr-2' & 'opt-genbask' ('/images/build/Black2/BLBABA.jpg')

if 'gr-2' & 'awn-blue' & 'opt-king' ('/images/build/Black2/BLBAKD.jpg')

if 'gr-2' & 'opt-king' ('/images/build/Black2/BLBAKD.jpg')

if 'gr-2' & 'awn-blue' & 'opt-genbask' & 'opt-king' ('/images/build/Black2/BLBAKDBA.jpg')

if 'gr-2' & 'opt-genbask' & 'opt-king' ('/images/build/Black2/BLBAKDBA.jpg')

if 'gr-2' & 'awn-blue' & 'opt-king' & 'opt-solar' ('/images/build/Black2/BLBAKDSO.jpg')

if 'gr-2' & 'opt-king' & 'opt-solar' ('/images/build/Black2/BLBAKDSO.jpg')

if 'gr-2' & 'awn-blue' & 'opt-king' & 'opt-solar' & 'opt-genbask' ('/images/build/Black2/BLBAKDSO.jpg')

if 'gr-2' & 'opt-king' & 'opt-solar' & 'opt-genbask'et ('/images/build/Black2/BLBAKDSOBA.jpg')

if 'gr-2' & 'awn-blue' & 'opt-solar' ('/images/build/Black2/BLBASO.jpg')

if 'gr-2' & 'opt-solar' ('/images/build/Black2/BLBASO.jpg')

if 'gr-2' & 'awn-blue' & 'opt-solar' & 'opt-genbask' ('/images/build/Black2/BLBASOBA.jpg')

if 'gr-2' & 'opt-solar' & 'opt-genbask' ('/images/build/Black2/BLBASOBA.jpg')
 
if 'gr-2' & 'awn-gray' ('/images/build/Black2/BLGA.jpg')

if 'gr-2' & 'awn-gray' & 'opt-genbask' ('/images/build/Black2/BLGABA.jpg')

if 'gr-2' & 'awn-gray' & 'opt-king' ('/images/build/Black2/BLGAKD.jpg')

if 'gr-2' & 'awn-gray' & 'opt-genbask' & 'opt-king' ('/images/build/Black2/BLGAKDBA.jpg')

if 'gr-2' & 'awn-gray' & 'opt-king' & 'opt-solar' ('/images/build/Black2/BLGAKDSO.jpg')

if 'gr-2' & 'awn-gray' & 'opt-king' & 'opt-solar' & 'opt-genbask' ('/images/build/Black2/BLGAKDSOBA.jpg')

if 'gr-2' & 'awn-gray' & 'opt-solar' ('/images/build/Black2/BLGAKDSO.jpg')

if 'gr-2' & 'awn-gray' & 'opt-solar' & 'opt-genbask' ('/images/build/Black2/BLGASOBA.jpg')

Also... is PHP the best way to do this? I don't want any lag in loading the image. Maybe some type of javascript to handle this or maybe preload all images?

Apr 18 '14 #1

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1447

Dormilich

8,658

Expert Mod 8TB

I don't want any lag in loading the image.

if you’re using PHP or any other server side language this doesn’t matter as the page has to be reloaded anyways.

if you don’t need a server roundtrip, use a combination of JavaScript and CSS image sprites.

Apr 19 '14 #2

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