Hi Matt,
first it might be easier to just use split here --
$fields = split("\t",$line);
.... I say might because I suspect that the records you have that are
converting incorrectly perhaps don't follow the tab convention? ... said
another way, I've never seen preg break because the file got over a meg
in size;)
On Fri, Dec 07, 2001 at 11:50:51PM -0000, Matthew Moreton wrote:
> Hi people. I am having some trouble with the PREG functions in php.
>
> Here's what I am trying to do...
>
> First of all I am reading in a file which is 1.5mb's in size, it could be many more,
>going up to 8mb's, the contents of the file is input to a string.
>
> The format of the file is as follows...
>
> # # # "quoted text" "quoted text" # #
>
> the # represents a number, in the case of the first 3 numbers they are only ever 1
>or 2 digits long. The final two digits can get to be rather big in size, thousands
>and millions. Each element is seperated by a tab space and then a carriage return
>(\r) terminates each record.
>
> I use preg_match_all to find all the lines that start with 1 and 1 as there first
>numbers, typically there will be 25 entries of 1 1. So I am looking for all lines in
>this format:
>
> 1 1 # "quoted text" "quoted text" # #
>
> I have the search pattern figured out, it is as follow:
>
>
>preg_match_all("/($first)\t($second)\t([0-9]{1,2})\t\"([^\"]*)\"\t\"([^\"]*)\"\t([0-9]*)\t([0-9]*)\r/",
> $input, $output, PREG_SET_ORDER );
>
> When this pattern finds a matching line beginning equal to $first and $second it
>will put all the elements of the record into the array $output. $output[0] being the
>array of the first elements found, $array[1] being the second line that was matched,
>and so on.
>
> This pattern does actually work to some extent. When the filesize is low (100kb) it
>works fine, but when I start to get over that filesize it becomes greedy and the
>$second value doesnt seem to be taken into account when it searchs. It seems to
>return everything that equals the following:
>
> 1 # # "quoted text" "quoted text" # #
>
> Obviously not what I want. Could this be some sort of overflow problem? I am at a
>lost end here, so if anyone could offer some insight as to why it is not functioning
>correctly I would most welcome it. Overwise the only solution I can think of is
>chopping up the input, I dont really want to go down that path, as it seems like a
>rather cheap workaround.
>
> Thanks.
>
> Matt
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