Here's the function I came up with- seems to work:
//finds all occurrences of $char in $temp and returns char positions in an
array
function char_positions($temp, $char)
{
while (strpos($temp, $char) !== FALSE){ //note the two '=='
$found = strpos($temp, $char);
$result[] = $found;
$temp = substr($temp, $found + 1, strlen($temp));
}
for ($i=0; $i<sizeof($result); $i++){
if ($i > 0){ #if not the first element
$result[$i] = $result[$i] + $result[$i-1] + 1;
}
}
if (sizeof($result)>0){
return FALSE;
}else{
return $result;
}
}
David
----- Original Message -----
From: "Kevin Stone" <[EMAIL PROTECTED]>
To: "David Yee" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Thursday, January 03, 2002 12:30 PM
Subject: Re: [PHP] find all the numeric positions of a character that
appears in a string multiple times
> SPLIT to the rescue! Split tears up your string into lists (arrays) which
> you can cycle through and extract normaly. So this is going to look like
> hell but here we go...
>
> <?
> $str = "<a href=http://foo.bar><b>test</b></a>";
>
> $str_list1 = split ('<', $str);
> // Note: $str_list1 now == array ("a href=http://foo.bar>", "b>test",
"/b>",
> "/a>")
> $a = 0;
> for ($i=0; $i<count($str_list1); $i++)
> {
> $str_list2 = split ('>', $str_list1[$i]);
> for ($j=0; $j<count($str_list2); $j++)
> {
> if (empty($str_list2[$j]))
> {
> next; // skip blank indexes...
> }
> else
> {
> $str_list[$a] = $str_list2[$j]; // populate results list...
> $a++;
> }
> }
> }
>
> // print it out...
> for ($i=0; $i<count($str_list); $i++)
> {
> echo "$str_list[$i]<br>";
> }
> ?>
>
>
> ... GAH! I second thought there's got to be a better way of doing this!
> Anyway hope it helps some.
>
> -Kevin
>
>
> > Hi guys. What is the best way to find all the numeric positions of a
> > character that appears in a string multiple times? E.g. let's say I
have
> > the following string:
> >
> > $str = "<a href=http://foo.bar><b>test</b></a>";
> >
> > And I want to parse the string and extract everything between <>. Now
if
> > the string only had a single occurrence of "<" and ">" I can use
strpos()
> > and substr() to extract it, but how do I do it for multiple occurrences?
> I
> > suppose I can keep chopping up the string to do this but I'm not sure if
> > that's the best way. Thanks.
> >
> > David
> >
> >
> > --
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> >
>
>
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