Default selected

Hi all,
I am trying to insert a list box with a drop-down menu starting from 20 & counting up to 90.What I want to do is that I want to make this code such that it should display say, 50, by default.What should I add to this code to do that?

<select name='price'>
<?php
for($i=20;$i<=90;$i++)
{
?>
<option value="<?php echo $i ?> ">
<?php echo $i; ?>
</option>
<?php
}?>
</select>

Code (markup):

Thanks in advance.

 

<?PHP
	$defaultOption = 50;
	
	$optionBox = "<select name='price'>\n";
	
	for($i=20;$i<=90;$i++) {
		if ($i == $defaultOption) {
			$optionBox .= "<option value='$i' selected='selected'>$i</option>\n";
		} else {
			$optionBox .= "<option value='$i'>$i</option>\n";
		}
	}
	
	$optionBox .= "</select>\n";
?>

<form name="test" action="">
<?PHP echo $optionBox ?>
</form>

PHP:

 

Thanks.But you have created the optionBox variable that was not in the code.
I wanted to achieve the same objective by just adding to the existing code without altering it much.
Is it not possible?

Thanks in advance.

 

Add:
<?php if ($i==50) echo ' selected="selected"'; ?>
inside the <option> tag

<select name='price'>
<?php
for($i=20;$i<=90;$i++)
{
?>
<option value="<?php echo $i ?>"<?php if ($i==50) echo ' selected="selected"'; ?>>
<?php echo $i; ?>
</option>
<?php
}?>
</select>

PHP:

 

Thanks everyone.
But what does this code do?-

$optionBox .= "</select>\n";

Code (markup):

I can't understand what this "."(dot) before the = sign do?
Also, \n means newline?
And,optionBox is a variable or a keyword?
Sorry to ask this questions but actually I am quite novice in programming.


Thanks in advance.

 

.= is a shortcut for appending.

e.g. $var .= 'string' is short for $var = $var . 'string'

And yes, \n is a new line and $optionBox is a variable (in PHP, variables have a $ prefix)