小白发帖求助。。。如截图所示，目前网页上有4个单选列表和多个多选列表，目的是用户点击Submit 按钮，后台获取已选择的选项，然后再在数据库中搜索，最后返回相应的搜索结果。
可是现在我都不知道如何在点击Submit后，获取user的选择的选项。 就是说关于Submit 的PHP 代码该怎么写啊啊。中间貌似还要涉及到转义字符的问题，求大家帮助！
附：代码片段和网页截图 (表单里的内容都是一些机械的feature，希望用户可以通过选择feature，搜索到所需的机械型号)
1) 这是一个单选列表
- HTML code
<div id="fourth" class="selection_options"> <select name="case_mounting" size="1" title="case and mounting"> <option value=" 1" SQR. PANEL"> 1" SQR. PANEL</option> <option value="0.95"X1.75" PANEL">0.95"X1.75" PANEL</option> <option value="2"X3" FLAT PACK PANEL">2"X3" FLAT PACK PANEL</option> <option value="HAND HELD CALIBRATOR">HAND HELD CALIBRATOR</option> <option value="EXP. PROOF CONDUIT">EXP. PROOF CONDUIT</option> <option value="1.45"X2.55" PANEL">1.45"X2.55" PANEL</option> <option value="NEMA 4X2.6"X3.7" CONDUIT/WALL">NEMA 4X2.6"X3.7" CONDUIT/WALL</option> <option value="1.6"X2" PANEL">1.6"X2" PANEL</option> <option value="AVIATION 1" DIAMETER">AVIATION 1" DIAMETER</option> <option value="DINRAIL">DINRAIL</option> <option value="3 1/2" BARREL PANEL">3 1/2" BARREL PANEL</option> <option value="1/8 DIN PANEL">1/8 DIN PANEL</option> <option value="1/4 DIN PANEL">1/4 DIN PANEL</option> <option value="4" SWITCHBOARD PANEL">4" SWITCHBOARD PANEL</option> <option value="1.5"X2.9"X2" PANEL">1.5"X2.9"X2" PANEL</option> <option value="6"X1" EDGEWISE PANEL">6"X1" EDGEWISE PANEL</option> <option value="6"X1.75" EDGEWISE PANEL">6"X1.75" EDGEWISE PANEL</option> <option value="6.6"X1.4" EDGEWISE PANEL">6.6"X1.4" EDGEWISE PANEL</option> <option value="11.3"X1.4" EDGEWISE PANEL">11.3"X1.4" EDGEWISE PANEL</option> <option value="7"X1.4" EDGEWISE PANEL">7"X1.4" EDGEWISE PANEL</option> <option value="7.3"X2.8" EDGEWISE PANEL">7.3"X2.8" EDGEWISE PANEL</option> <option value="6.3"X2.8 EDGE PANEL ">6.3"X2.8 EDGE PANEL </option> <option value="5.7"X1.9" EDGE PANEL">5.7"X1.9" EDGE PANEL</option> <option value="5.7"X2.84" EDGE PANEL">5.7"X2.84" EDGE PANEL</option> <option value="NAKED PANEL/PCB MOUNT">NAKED PANEL/PCB MOUNT</option> <option value="6"X3.1" EDGE PANEL">6"X3.1" EDGE PANEL</option> <option value="6"X6"X3" SANITARY">6"X6"X3" SANITARY</option> <option value="VARIOUS SIZES & MOUNTING">VARIOUS SIZES & MOUNTING</option> </select> </div>
2) 这是其中一个复选列表
- HTML code
<div id="fifth" class="selection_name">
Outputs (Use ctrl+click to make multiple choices)
</div>
<div id="fifth" class="selection_options">
<select name="outputs[]" size="6" multiple="multiple" title="out puts">
<option value="NULL" selected="selected"> </option>
<option value="ANALOG 4-20mA/VDC">ANALOG 4-20mA/VDC</option>
<option value="RELAYS">RELAYS</option>
<option value="OPEN COLL. XTR">OPEN COLL. XTR</option>
<option value="IRDA">IRDA</option>
<option value="4-20mA CALIBRATOR">4-20mA CALIBRATOR</option>
<option value="WIRELESS ON REQUEST">WIRELESS ON REQUEST</option>
</select>