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PARSEPAGE.php
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PARSEPAGE.php
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<?php
/*
Released through http://bibliophile.sourceforge.net under the GPL licence.
Do whatever you like with this -- some credit to the author(s) would be appreciated.
A collection of PHP classes to manipulate bibtex files.
If you make improvements, please consider contacting the administrators at bibliophile.sourceforge.net
so that your improvements can be added to the release package.
Mark Grimshaw 2005
http://bibliophile.sourceforge.net*/
/*****
* PARSEPAGE: BibTeX PAGES import class
*****/
class PARSEPAGE
{
// Constructor
function PARSEPAGE()
{
}
// Create page arrays from bibtex input.
// 'pages' field can be:
// "77--99"
// "3 - 5"
// "ix -- 101"
// "73+"
// 73, 89,103"
// Currently, PARSEPAGE will take 1/, 2/ and 3/ above as page_start and page_end and, in the other cases, will accept
// the first valid number it finds from the left as page_start setting page_end to NULL
function init($item)
{
$item = trim($item);
if($this->type1($item))
return $this->return;
// else, return first number we can find
if(preg_match("/(\d+|[ivx]+)/i", $item, $array))
return array($array[1], FALSE);
// No valid page numbers found
return array(FALSE, FALSE);;
}
// "77--99" or '-'type?
function type1($item)
{
$start = $end = FALSE;
$array = preg_split("/--|-/", $item);
if(sizeof($array) > 1)
{
if(is_numeric(trim($array[0])))
$start = trim($array[0]);
else
$start = strtolower(trim($array[0]));
if(is_numeric(trim($array[1])))
$end = trim($array[1]);
else
$end = strtolower(trim($array[1]));
if($end && !$start)
$this->return = array($end, $start);
else
$this->return = array($start, $end);
return TRUE;
}
return FALSE;
}
}
?>