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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hi to all<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am using PHP5-Mapscript together with Mapserver 6.0 and I have a layer which obtains its data from a MySQL database via an OGR connection. This all works, but I am having trouble with two items of PHP-Mapscript syntax:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>$layer->getExtent() – I can’t make this work with my layer: can someone confirm if it works with a MySQL layer and if so give a syntax example?<o:p></o:p></p><p class=MsoListParagraph><o:p> </o:p></p><p class=MsoListParagraph><o:p> </o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>$query= $layer->queryByAttributes(null, $expression, MS_MULTIPLE); <o:p></o:p></p><p class=MsoListParagraph><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>On the 2<sup>nd</sup> question I came across some advice from Frank Wamerdam dated 2006 which said:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'>“The trick with OGR connections to pass the filter through to OGR is to use<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'>a query expression starting with WHERE. So you might do something like:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'> expr = 'WHERE ' + $qField + ' = ' + $qValue<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'> $qLayer->queryByAttributes(null,$expr,MS_MULTIPLE);<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New";color:black'>(forgive my incorrect PHP syntax, I'm just trying to get the idea accross).”<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>However I can’t come up with any expression that gives me any results at all. Is there any current advice on how to do this kind of query over an OGR connection?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Chris<o:p></o:p></p></div></body></html>