Leading zero's

[iamtom]

Thnaks in advance for any pointers...

I have a data filed that is 4 characters long,

It is set to hold 4 numbers  XXXX

I and using it to hold the last 4 of credit card number , $last4 = substr($Ccrd, -4, 4);

My problem is when any on the first characters are 0's it does not show them, so I get " 145" when I should get "0145". 

How can I prevent this and show the leading 0 ?

 

Thanks

Tom

[ddrudik]

That doesn't seem to follow with how strings work, consider this code:

<?php
$Ccrd="1234123412340001";
$last4 = substr($Ccrd, -4, 4);
echo $last4;
?>

output:

0001

 

Possibly show the code where you assign $Ccrd.

[corbin]

He means it's 145 in the database....

 

 

 

@OP google zerofill.

[gevans]

Store the number as a string instead of a number

 

$number = 0055;
echo $number;//prints 55

$number = "0055";
echo $number;//prints 0055

<?php
$Ccrd="1234123412340001";
$last4 = settype(substr($Ccrd, -4, 4), "string");
echo $last4;
?>

 

too the last bit of code from ddrudik, just need to set it as a string

[.josh]

sprintf

[ddrudik]

He means it's 145 in the database....

 

I see where everyone's going with the question, it's just that the code and output shown in the question do not match with a string or number designation, consider:

<pre>
<?php
$Ccrd="1234123412340145";
$last4 = substr($Ccrd, -4, 4);
echo "[$last4]<br>";
$Ccrd=1234123412340145;
$last4 = substr($Ccrd, -4, 4);
echo "[$last4]";
?>

output:

[0145]
[0100]