How do I split a numerical query result? [closed] - php

Question

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.
Closed 9 years ago.
I'm pulling an id number from a database where it is stored as 12345
When I display it on my page (php), I'd like to have it show up as 1-2345
Can I do this without using Javascript? If so, how?
Thanks!
ETA: it's part of a loop of data that is pulled dynamically, so the number is always different. I need to be able to tell it to put a dash after the first number. It's not necessarily 1-2345; it's more X-XXXX (where X is a random number).

Answer 1

You should be able to use the following in MySQL:
select
concat(left(yourCol, 1),
'-',
right(yourcol, length(yourCol)-1)) YourValue
from yourtable
See SQL Fiddle with Demo
This implements the following MySQL functions:
CONCAT
LEFT
RIGHT
LENGTH
Or you can use SUBSTR instead of RIGHT and LENGTH:
select
concat(left(yourCol, 1),
'-',
substr(yourcol, 2)) YourValue
from yourtable;
See SQL Fiddle with Demo
SUBSTR

Answer 2

In PHP
$id = (str)$dbVal;
$str = $id[0]."-".substr($id, 1, strlen($id) - 1);
echo $str;

Answer 3

$var = "12345";
echo $var[0] . "-" . substr($var,1);
This should work for values of any length.

Answer 4

First, use your SELECT MySQL command to find your ID number.
Let's say $string is actually the 'stringified' version of the ID.
$string = "12345";
$string = str_replace($string[0], $string[0] . "-", $string);
echo $string;

Answer 5

The other answers don't address where to put your code, and why. Inserting a dash after the first digit is display-related logic, and display-related logic belongs in the template. It certainly doesn't belong in the database layer. You could put the actual code right alongside the HTML, but that would be a) probably not very intent-revealing and b) not very reusable.
For the best separation of concerns, I would first define a "helper" function like this, in its own file:
function insert_dash_after_first_number($value)
{
return str_replace($value[0], $value[0].'-', $value);
}
Then, in your template, you can do this (granted you included the helper file):
<?php echo insert_dash_after_first_number('12345'); ?>
Hopefully you can see that separating things in this way would make it pretty clear to others and your future self what's going on. You can just look at the function name and see "oh, this inserts a dash after the first number". You don't have to look at any code and think about what it might do.

Answer 6

$string1 = substr($id, 0,1);
$string2 = substr($id, 1, strlen($id));