Using one form field to toggle others [was "PHP option selection help" in PHP]

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January 7th, 2013, 10:41 AM

jennypretty

Registered User

Join Date: Aug 2008

Posts: 17

Time spent in forums: 52 m 19 sec
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PHP option selection help

Hello,

I tried to create a drop-down for users to pick. If a user pick 'United States', then Us States will show up. Otherwise, 'Outside usa' will show.

It didn't work. Here is my code:

dt>Country</dt>
<dd>
<select class="select" id="field_country" name="country">
<option value="1" selected="selected">United States</option>
<option value="2">Canada</option><option value="3">Afghanistan</option>
</select>
</dd>
<?php if (field_country) == "1") { ?>
<dt>State</dt>
<dd>
<select class="select" id="field_state" name="state">
<option value="1">Alabama</option>
<option value="2">Alaska</option>
<option value="3">Arizona</option>
<option value="5" selected="selected">California</option>
</select>
</dd>
<?php } else { ?>
<dt>State</dt>
<dd>
<select class="select" id="field_state" name="state">
<option value="6" selected="selected">Outside Usa</option>
</select>
</dd>
<?php } ?>

Thanks.

January 7th, 2013, 11:22 AM

gw1500se

Contributing User

Join Date: Jul 2003

Posts: 2,907

Time spent in forums: 1 Year 1 Month 16 h 33 m 11 sec
Reputation Power: 581

Please enclose your code in [ PHP ] tags. See the sticky at the top of this forum.

I think you are confusing what happens where. PHP is server side. Once the page is served out that ends PHP's involvement and it knows nothing after that. Drop down selections are made on the browser (client) side so PHP will never see it. You need to accomplish what you want with JavaScript.

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January 7th, 2013, 01:12 PM

web_loone08

Contributing User

Join Date: Aug 2008

Posts: 658

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Actually you can use client side or server side language to do this or you can use both (like my example below).

Code:

<?php
$field_country = $_GET["country"];
?>

<script>
function redirectCountry(setCountry)
{
 setCountry = parseInt(setCountry);
  if (setCountry > 0) {
   document.location.href = "?country=" + setCountry;
  }
}
</script>

<dt>Country</dt>
<dd>
<select class="select" id="field_country" name="country" onchange="redirectCountry(this.value)">
<option value="0"/>Select Your Country</option>
<option value="1">United States</option>
<option value="2">Canada</option><option value="3">Afghanistan</option>
</select>
</dd>
<?php 
if ($field_country == 1) {
echo '<dt>State</dt>
<dd>
<select class="select" id="field_state" name="state">
<option value="1">Alabama</option>
<option value="2">Alaska</option>
<option value="3">Arizona</option>
<option value="5" selected="selected">California</option>
</select>
</dd>';
} 
else if ($field_country > 1) {
echo '<dt>State</dt>
<dd>
<select class="select" id="field_state" name="state">
<option value="6" selected="selected">Outside Usa</option>
</select>
</dd>';
}
?>

It all depends on how you want to display your select menu(s).

Using one form field to toggle others [was "PHP option selection help" in PHP]

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