Split string like 'something.jpg,123' into $filename and $number

[Martin Lucas-Smith]

I am trying to take a string and split it into a filename and a number
where the number is what follows the *last* instance of a comma in that
string.

Split and explode won't work because if the filename part of the original
string contains a , then I end up with too many parts.

if (!preg_match ('/^(.*),([0-9]+)$/', $string, $matches)) {throwError ();}
also fails, because the first part of the regular expression becomes
greedy if there is a , in it.


I.e. can anyone suggest a solution such that

$string = 'something.jpg, 123';
returns:
$matches['filename'] = something.jpg
$matches['number'] = 123


$string = 'something,foo. jpg,123';
returns:
$matches['filename'] = something,foo.j pg
$matches['number'] = 123


and ideally

$string = 'somethingfoo.j pg123'; // No comma contained so it's invalid
returns:
false

?


Martin Lucas-Smith www.geog.cam.ac.uk/~mvl22

https://www.lucas-smith.co.uk

[Doc Dunning]

Re: Split string like 'something.jpg, 123' into $filename and $number

Hi

I suggest you need something like this, in the PHP Manual

=============== ==========
strrpos ( string haystack, char needle)


Returns the numeric position of the last occurrence of needle in the
haystack string. Note that the needle in this case can only be a single
character. If a string is passed as the needle, then only the first
character of that string will be used.

If needle is not found, returns FALSE.

=============== ==========

Once you've got the position of the last comma, you can use substr to pick
the portion of the string to the left and right of it.



"Martin Lucas-Smith" <mvl22@cam.ac.u k> wrote in message
news:Pine.SOL.4 .44.03120515372 30.17830-100000@orange.c si.cam.ac.uk...[color=blue]
>
>
> I am trying to take a string and split it into a filename and a number
> where the number is what follows the *last* instance of a comma in that
> string.
>
> Split and explode won't work because if the filename part of the original
> string contains a , then I end up with too many parts.
>
> if (!preg_match ('/^(.*),([0-9]+)$/', $string, $matches)) {throwError ();}
> also fails, because the first part of the regular expression becomes
> greedy if there is a , in it.
>
>
> I.e. can anyone suggest a solution such that
>
> $string = 'something.jpg, 123';
> returns:
> $matches['filename'] = something.jpg
> $matches['number'] = 123
>
>
> $string = 'something,foo. jpg,123';
> returns:
> $matches['filename'] = something,foo.j pg
> $matches['number'] = 123
>
>
> and ideally
>
> $string = 'somethingfoo.j pg123'; // No comma contained so it's invalid
> returns:
> false
>
> ?
>
>
> Martin Lucas-Smith www.geog.cam.ac.uk/~mvl22
> www.lucas-smith.co.uk
>[/color]

[Markus Ernst]

Re: Split string like 'something.jpg, 123' into $filename and $number

"Martin Lucas-Smith" <mvl22@cam.ac.u k> schrieb im Newsbeitrag
news:Pine.SOL.4 .44.03120515372 30.17830-100000@orange.c si.cam.ac.uk...[color=blue]
>
>
> I am trying to take a string and split it into a filename and a number
> where the number is what follows the *last* instance of a comma in that
> string.
>
> Split and explode won't work because if the filename part of the original
> string contains a , then I end up with too many parts.
>
> if (!preg_match ('/^(.*),([0-9]+)$/', $string, $matches)) {throwError ();}
> also fails, because the first part of the regular expression becomes
> greedy if there is a , in it.
>
>
> I.e. can anyone suggest a solution such that
>
> $string = 'something.jpg, 123';
> returns:
> $matches['filename'] = something.jpg
> $matches['number'] = 123
>
>
> $string = 'something,foo. jpg,123';
> returns:
> $matches['filename'] = something,foo.j pg
> $matches['number'] = 123
>
>
> and ideally
>
> $string = 'somethingfoo.j pg123'; // No comma contained so it's invalid
> returns:
> false
>
> ?[/color]

$array = explode(",",$st ring);
$c = count($array);
if($c<2) $matches = false;
else {
$matches['filename'] = "";
for($i=0;$i<$c; $i++) {
if($i==$c-1) $matches['number'] = $array[$i];
else $matches['filename'] .= $array[$i].",";
}
$matches['filename'] = substr($matches['filename'], 0, -1);
}

HTH
Markus

[R. Rajesh Jeba Anbiah]

Re: Split string like 'something.jpg, 123' into $filename and $number

Martin Lucas-Smith <mvl22@cam.ac.u k> wrote in message news:<Pine.SOL. 4.44.0312051537 230.17830-100000@orange.c si.cam.ac.uk>.. .[color=blue]
> I am trying to take a string and split it into a filename and a number
> where the number is what follows the *last* instance of a comma in that
> string.
>
> Split and explode won't work because if the filename part of the original
> string contains a , then I end up with too many parts.
>
> if (!preg_match ('/^(.*),([0-9]+)$/', $string, $matches)) {throwError ();}
> also fails, because the first part of the regular expression becomes
> greedy if there is a , in it.
>
>
> I.e. can anyone suggest a solution such that
>
> $string = 'something.jpg, 123';
> returns:
> $matches['filename'] = something.jpg
> $matches['number'] = 123
>
>
> $string = 'something,foo. jpg,123';
> returns:
> $matches['filename'] = something,foo.j pg
> $matches['number'] = 123
>
>
> and ideally
>
> $string = 'somethingfoo.j pg123'; // No comma contained so it's invalid
> returns:
> false[/color]

/^(\w+,?\w+\.jpg ),(\d+)$/

Done with "The Regex Coach" <http://www.weitz.de/regex-coach/>

--
"Silence is the only right answer for many wrong questions" --
G.K.Moopanar, Politician
Email: rrjanbiah-at-Y!com