Re: <select name=....
| From: | Simon Garner | Date: | Fri, 23 Feb 2001 05:33:24 +0000 |
| Subject: | Re: <select name=.... | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-41263@lists.php.net to get a copy of this message | ||
From: "Jonathan Sharp" <webdev@flyerware.com>
> well...i just finished some code for dealing with an option box that has
all
> the states listed...
>
> <select name="state" size="1">
> <option value="">Select State</option>
> <?
> $ST[] = 'AL'; $ST[] = 'AK'; $ST[] = 'AR'; $ST[] = 'AZ';
> $ST[] = 'CA'; $ST[] = 'CO'; $ST[] = 'CT'; $ST[] = 'DC';
> $ST[] = 'DE'; $ST[] = 'FL'; $ST[] = 'GA'; $ST[] = 'HI';
> $ST[] = 'IA'; $ST[] = 'ID'; $ST[] = 'IL'; $ST[] = 'IN';
> $ST[] = 'KS'; $ST[] = 'KY'; $ST[] = 'LA'; $ST[] = 'MA';
> $ST[] = 'MD'; $ST[] = 'ME'; $ST[] = 'MI'; $ST[] = 'MN';
> $ST[] = 'MO'; $ST[] = 'MS'; $ST[] = 'MT'; $ST[] = 'NC';
> $ST[] = 'ND'; $ST[] = 'NE'; $ST[] = 'NH'; $ST[] = 'NJ';
> $ST[] = 'NM'; $ST[] = 'NV'; $ST[] = 'NY'; $ST[] = 'OH';
> $ST[] = 'OK'; $ST[] = 'OR'; $ST[] = 'PA'; $ST[] = 'PR';
> $ST[] = 'RI'; $ST[] = 'SC'; $ST[] = 'SD'; $ST[] = 'TN';
> $ST[] = 'TX'; $ST[] = 'UT'; $ST[] = 'VA'; $ST[] = 'VT';
> $ST[] = 'WA'; $ST[] = 'WV'; $ST[] = 'WI'; $ST[] = 'WY';
> for($i = 0; $i < count($ST); $i++)
> {
> echo '<option value="'.$ST[$i].'"';
> if($state == $ST[$i])
> {
> echo ' selected';
> }
> echo '>'.$ST[$i]."</option>\n";
> }//For
> ?>
> </select>
>
> First it creates an array $ST that contains a list of all the states
> (includes PR and DC)
> Next it loops through that array and if $state has the same value as the
> state, it selects it...
>
> You could probably turn this into a function or something...
>
> =codeboy
>
Or better would be:
<?php
$states = array('AL', 'AK', 'AR', 'AZ', 'CA',
'CO', 'CT', 'DC', 'DE',
'FL', 'GA', 'HI', 'IA', 'ID',
'IL', 'IN', 'KS', 'KY', 'LA', 'MA',
'MD',
'ME', 'MI', 'MN', 'MO', 'MS',
'MT', 'NC', 'ND', 'NE', 'NH', 'NJ',
'NM', 'NV', 'NY', 'OH', 'OK',
'OR', 'PA', 'PR', 'RI', 'SC', 'SD',
'TN', 'TX', 'UT', 'VA', 'VT',
'WA', 'WV', 'WI', 'WY');
foreach ($states as $s)
{
echo "<option value=\"$s\"";
if ($state == $s) echo " selected";
echo ">$s</option>";
}
?>
PHP has many syntax features and language constructs which can significantly
improve code performance and manageability -- use them!
Now this code could easily be extended to give each state a descriptive
name, and to create a generic listbox-drawing function which you can then
re-use elsewhere in your program (or as a code snippet which you can use in
other programs in the future!):
<?php
function drawListBox ($name, $data, $selectedvalue="")
{
echo "<select name=\"$name\">\n";
foreach ($data as $key => $value)
{
echo "<option value=\"$key\"";
if ($selectedvalue == $key) echo " selected";
echo ">$value</option>\n";
}
echo "</select>";
}
$states = array(
"AL" => "Alabama",
"AK" => "Arkansas",
"AZ" => "Arizona",
... etc
"WY" => "Wyoming"
);
drawListBox("state", $states, $state);
?>
When it comes to programming, in many ways "laziness is a virtue". Instead
of writing the same code 10 times over in subtly different ways, write it
once and make it reusable! Not only does this save you time, it can make
your program less buggy and easier to upgrade.
</lecture> :)
Cheers
Simon Garner