Keeping a 0 in front of an integer

[rollOrDie]

If I set a variable equal to the value

02

is there a way to keep the preceding 0 if I am to increment / decrement it?

[roopurt18]

Display the value as:

sprintf( "%02s", $value );

[DarkWater]

@roopurt:  Well, I can see him getting potentially confused, so I'll clarify. 

 

You're actually going to want to use printf() to display the value, because sprintf() returns the value for assignment to a variable.  So yeah. >_>

[rollOrDie]

Thanks, although Im still a little confused!

 

How would I use it to create a script equivalent to the following but keeping the preceding 0?

 

<?php

$num = 02;

echo $num ++;

?>

[papaface]

Ignore me lol

[roopurt18]

<?php
$width = 2; // width of printed value

for( $i = 0; $i <= 10; $i++ ) {
  echo sprintf( "%0{$width}s", $i ) . '<br />'; // or "\n"
}
?>

[rollOrDie]

Hmmm Ive got this

				$width = 2;

				for ($month = 1; $month <= 12; $month ++)
					{
						echo '
						<option value="';

						echo sprintf ('%0{$width}s', $month);
						echo '"';

						if ($month == $dateMonth)
							{
								echo ' selected="selected"';
							}

						echo '>0';

						echo sprintf ('%0{$width}s', $month);
						echo '</option>';
					}

 

But its just being output as:

 

<option value="$width}s">0$width}s</option>

						<option value="$width}s">0$width}s</option>
						<option value="$width}s">0$width}s</option>
						<option value="$width}s">0$width}s</option>
						<option value="$width}s">0$width}s</option>
						<option value="$width}s" selected="selected">0$width}s</option>
						<option value="$width}s">0$width}s</option>

						<option value="$width}s">0$width}s</option>
						<option value="$width}s">0$width}s</option>
						<option value="$width}s">0$width}s</option>
						<option value="$width}s">0$width}s</option>
						<option value="$width}s">0$width}s</option></select>

[cooldude832]

what you are trying to do doesn't make sense to a person who "programs" because an integer doesn't exist with a leading zero as you suggest.

 

Just try and keep what u are doing clear.

[Barand]

To "people who program" it makes perfect sense. It's octal notation.

 

http://en.wikipedia.org/wiki/Octal

 

echo 012; // ---> 10 (decimal)

[kenrbnsn]

Since you're dealing with months, I find it's easier to use the date() and strtotime() functions:

<?php
$tmp = array();
$tmp[] = '<select name="month">';
for ($i=1;$i<13;$i++) {
     $x = strtotime($i . '/1/'. date('Y'));
     $tmp[] = '<option value="' . date('m',$x) . '">' . date('F',$x) . '</option>'; 
}
$tmp[] = '</select>';
echo implode("\n",$tmp);
?>

 

Ken

[cooldude832]

if u let me type it out

to people who program in base 10 system

()

[Barand]

@rollOrDie,

 

simpler is

for ($m=1; $m<=12; $m++)
{
printf("<option value='%02d'>%02d</option>\n", $m, $m);
}

 

-->

<option value='01'>01</option>
<option value='02'>02</option>
<option value='03'>03</option>
<option value='04'>04</option>
<option value='05'>05</option>
<option value='06'>06</option>
<option value='07'>07</option>
<option value='08'>08</option>
<option value='09'>09</option>
<option value='10'>10</option>
<option value='11'>11</option>
<option value='12'>12</option>

[rollOrDie]

Thanks for the replies!

[Barand]

if u let me type it out

to people who program in base 10 system

()

 

You are probably unique in that respect. There aren't many of you about who program purely in decimal numbers without ever resorting to other bases. For example, hexadecimal values for HTML/CSS colors, octal for chmod values.