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multiple search parameters with mysql queries


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I have a quick search form for my site. There are three parameters: horse breed, zip code, and location. Users don't have to enter all of the information, rather 1 parameter or 2 or all. My problem is I can get the code for the zip code to work, but when I go to code in the rest of the parameters the code seems to stall.


Anyone that can give a little light on this problem would be a great help. I have been working on this problem for days with no help.


Once I figure out this problem I can go on to make an advanced search with many more parameters.


Thanks in advance

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do this in your condition

function($x=' ',$y=' ',$z=' '){
     $query = ( sql here ) where 1=1;
  if ($x==' '){
          $query.= "and  field=cool";
if ($y==' '){
          $query.= "and  field2=teng";
if ($z==' '){
          $query.= "and  field3=teng84";
   return $query;


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