PHP form Variables - 2min Job

PHP form Variables - 2min Job - Easy

Hello Experts,

I have minimal & clumsy php skill.

You will see three drop-down <select> item. Basically, the first allows a user to select "units" (feet or meters) - accordingly, I need only one of the following two drop down list to show.

Can somebody wrap these items in a few lines of PHP? Cheers

<select name="units" class="style31" id="units" style="width:65px" >
  <option  selected='selected'  value="1">Meters</option>
  <option  value="0.093025">Feet</option>
</select>
 
<select name="length" class="style31" id="length" style="width:65px" >
  <option value="7.0">7.0m</option>
  <option value="7.2">7.2m</option>
  <option value="7.4">7.4m</option>
  <option value="7.6">7.6m</option>
  <option value="7.8">7.8m</option>
  <option value="8.0">8.0m</option>
  <option value="8.2">8.2m</option>
  <option value="8.4">8.4m</option>
  <option value="8.6">8.6m</option>
  <option value="8.8">8.8m</option>
  <option value="9.0">9.0m</option>
  <option value="9.2">9.2m</option>
  <option value="9.4">9.4m</option>
  <option value="9.6">9.6m</option>
  <option value="9.8">9.8m</option>
  <option value="10.0">10.0m</option>
  <option value="10.2">10.2m</option>
  <option value="10.4">10.4m</option>
  <option value="10.6">10.6m</option>
  <option value="10.8">10.8m</option>
  <option value="11.0">11.0m</option>
  <option value="11.2">11.2m</option>
  <option value="11.4">11.4m</option>
  <option value="11.6">11.6m</option>
  <option value="11.8">11.8m</option>
  <option value="12.0">12.0m</option>
  <option value="12.5">12.5m</option>
  <option value="13.0">13.0m</option>
  <option value="13.5">13.5m</option>
  <option value="14.0">14.0m</option>
</select>
 
<select name="length" class="style31" id="length" style="width:65px" onChange="KW_calcForm('units',1,-1,'#shape','*','#units','*','#length','*','#width','*','#depth','*','1000');fnFormatField(volume)">
  <option value="23">23'</option>
  <option value="24">24'</option>
  <option value="25">25'</option>
  <option value="26">26'</option>
  <option value="27">27'</option>
  <option value="28">28'</option>
  <option value="29">29'</option>
  <option value="30">30m'</option>
  <option value="31">31'</option>
  <option value="32">32'</option>
  <option value="33">33'</option>
  <option value="34">34'</option>
  <option value="35">35'</option>
  <option value="36">36'</option>
  <option value="37">37'</option>
  <option value="38">38'</option>
  <option value="39">39'</option>
  <option value="40">40'</option>
  <option value="41">41'</option>
  <option value="42">42'</option>
  <option value="43">43'</option>
  <option value="44">44'</option>
  <option value="45">45'</option>
</select>

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To use PHP to do this, we will need to combine PHP and the onChange event of JavaScript to submit the form to itself (which will send along the value you have chosen in the first dropdown). The one change you will need to make will be to set the action of the form to the name of the script you save this as. Enjoy! If you have questions, let me know.

-Dan

<form method="POST" action="dropdowns.php">
<select name="units" class="style31" id="units" style="width:65px" onChange="submit();">
  <option></option>
  <option value="1">Meters</option>
  <option value="0.093025">Feet</option>
</select>
</form>
 
<?php 
if($_POST['units'] == "1")
{
?> 
<select name="length" class="style31" id="length" style="width:65px" >
  <option value="7.0">7.0m</option>
  <option value="7.2">7.2m</option>
  <option value="7.4">7.4m</option>
  <option value="7.6">7.6m</option>
  <option value="7.8">7.8m</option>
  <option value="8.0">8.0m</option>
  <option value="8.2">8.2m</option>
  <option value="8.4">8.4m</option>
  <option value="8.6">8.6m</option>
  <option value="8.8">8.8m</option>
  <option value="9.0">9.0m</option>
  <option value="9.2">9.2m</option>
  <option value="9.4">9.4m</option>
  <option value="9.6">9.6m</option>
  <option value="9.8">9.8m</option>
  <option value="10.0">10.0m</option>
  <option value="10.2">10.2m</option>
  <option value="10.4">10.4m</option>
  <option value="10.6">10.6m</option>
  <option value="10.8">10.8m</option>
  <option value="11.0">11.0m</option>
  <option value="11.2">11.2m</option>
  <option value="11.4">11.4m</option>
  <option value="11.6">11.6m</option>
  <option value="11.8">11.8m</option>
  <option value="12.0">12.0m</option>
  <option value="12.5">12.5m</option>
  <option value="13.0">13.0m</option>
  <option value="13.5">13.5m</option>
  <option value="14.0">14.0m</option>
</select>
<?php
}
elseif($_POST['units'] == "0.093025")
{
?>
<select name="length" class="style31" id="length" style="width:65px" onChange="KW_calcForm('units',1,-1,'#shape','*','#units','*','#length','*','#width','*','#depth','*','1000');fnFormatField(volume)">
  <option value="23">23'</option>
  <option value="24">24'</option>
  <option value="25">25'</option>
  <option value="26">26'</option>
  <option value="27">27'</option>
  <option value="28">28'</option>
  <option value="29">29'</option>
  <option value="30">30m'</option>
  <option value="31">31'</option>
  <option value="32">32'</option>
  <option value="33">33'</option>
  <option value="34">34'</option>
  <option value="35">35'</option>
  <option value="36">36'</option>
  <option value="37">37'</option>
  <option value="38">38'</option>
  <option value="39">39'</option>
  <option value="40">40'</option>
  <option value="41">41'</option>
  <option value="42">42'</option>
  <option value="43">43'</option>
  <option value="44">44'</option>
  <option value="45">45'</option>
</select>
<?php
}
?>

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PHP form Variables - 2min Job - Easy

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