Question

For some reason one magento url is not working fine on my website.
see here:
Integrity constraint violation: 1052 Column 'position' in order clause is ambiguous

So, I decided that I could do a redirect for this failing url:
I tried with apache but it doesnt work
see here:
Apache simple redirect from one page to a second one

They suggested to do it with php

can someone pls explain me how to do this with php?

something like

if url = 'myfaliingurl' then
  redirect to new url

thats it

this is what I tried in apache

Redirect 301 http://www.theprinterdepo.com/catalogsearch/result/index/?cat=100&q=1022&x=0&y=0 http://www.theprinterdepo.com/catalogsearch/advanced/result/?name=1022&sku=&price%5Bfrom%5D=&price%5Bto%5D=&free_shipping=&category=100

Update 1:

Its not working, I put this on index.php at the end.

if($url == 'http://www.theprinterdepo.com/catalogsearch/result/index/?cat=100&q=1022&x=0&y=0')
  {
          header('location:http://www.theprinterdepo.com/catalogsearch/result/index/?cat=100&q=1022&x=0&y=0 http://www.theprinterdepo.com/catalogsearch/advanced/result/?name=1022&sku=&price%5Bfrom%5D=&price%5Bto%5D=&free_shipping=&category=100');
          exit();
  }
else
{
Mage::run('printerdepo','website');
}

Answer 1

Using this code you get

 <?php
  if($url == 'myfaliingurl')
  {
          header('location:http://www.theprinterdepo.com/catalogsearch/result/index/?cat=100&q=1022&x=0&y=0 http://www.theprinterdepo.com/catalogsearch/advanced/result/?name=1022&sku=&price%5Bfrom%5D=&price%5Bto%5D=&free_shipping=&category=100');
  }
  else{
          header('location:otherposition');
  }
  ?>