note 110129 modified in function.preg-match-all by danbrown
| From: | danbrown@php.net | Date: | Thu, 06 Dec 2012 15:15:07 +0000 |
| Subject: | note 110129 modified in function.preg-match-all by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-192361@lists.php.net to get a copy of this message | ||
As I intended to create for my own purpose a clean PHP class to act on XML files, combining the use
of DOM and simplexml functions, I had that small problem, but very annoying, that the offsets in a
path is not numbered the same in both.
That is to say, for example, if i get a DOM xpath object it appears like:
/ANODE/ANOTHERNODE/SOMENODE[9]/NODE[2]
and as a simplexml object would be equivalent to:
ANODE->ANOTHERNODE->SOMENODE[8]->NODE[1]
So u see what I mean? I used preg_match_all to solve that problem, and finally I got this after some
hours of headlock (as I'm french the names of variables are in French sorry), hoping it could
be useful to some of you:
<?php
function decrease_string($string)
{
/* retrieve all occurrences AND offsets of numbers in the original string: */
preg_match_all("/[0-9]+/",$chaine,$out,PREG_OFFSET_CAPTURE);
for($i=0;$i<sizeof($out[0]);$i++)
{
$longueurnombre = strlen((string)$out[0][$i][0]);
$taillechaine = strlen($chaine);
// cut the string in 3 pieces
$debut = substr($chaine,0,$out[0][$i][1]);
$milieu = ($out[0][$i][0])-1;
$fin = substr($chaine,$out[0][$i][1]+$longueurnombre,$taillechaine);
/* if it's 10,100,1000, the problem is that the string gets shorter and it shifts all the
offsets, so we have to decrease them of 1 */
if(preg_match('#[1][0]+$#', $out[0][$i][0]))
{
for($j = $i+1;$j<sizeof($out[0]);$j++)
{
$out[0][$j][1] = $out[0][$j][1] -1;
}
}
$chaine = $debut.$milieu.$fin;
}
return $chaine;
}
?>
--was--
As I intended to create for my own purpose a clean PHP class to act on XML files, combining the use
of DOM and simplexml functions, I had that small problem, but very annoying, that the offsets in a
path is not numbered the same in both.
That is to say, for example, if i get a DOM xpath object it appears like:
/ANODE/ANOTHERNODE/SOMENODE[9]/NODE[2]
and as a simplexml object would be equivalent to:
ANODE->ANOTHERNODE->SOMENODE[8]->NODE[1]
So u see what I mean? I used preg_match_all to solve that problem, and finally I got this after some
hours of headlock (as I'm french the names of variables are in French sorry), hoping it could
be useful to some of you:
function decrease_string($string)
{
/* retrieve all occurrences AND offsets of numbers in the original string: */
preg_match_all("/[0-9]+/",$chaine,$out,PREG_OFFSET_CAPTURE);
for($i=0;$i<sizeof($out[0]);$i++)
{
$longueurnombre = strlen((string)$out[0][$i][0]);
$taillechaine = strlen($chaine);
// cut the string in 3 pieces
$debut = substr($chaine,0,$out[0][$i][1]);
$milieu = ($out[0][$i][0])-1;
$fin = substr($chaine,$out[0][$i][1]+$longueurnombre,$taillechaine);
/* if it's 10,100,1000, the problem is that the string gets shorter and it shifts all the
offsets, so we have to decrease them of 1 */
if(preg_match('#[1][0]+$#', $out[0][$i][0]))
{
for($j = $i+1;$j<sizeof($out[0]);$j++)
{
$out[0][$j][1] = $out[0][$j][1] -1;
}
}
$chaine = $debut.$milieu.$fin;
}
return $chaine;
}
http://php.net/manual/en/function.preg-match-all.php