Req #52124 [Opn]: [strpos] Limit search inside $haystack by new $length parameter
Edit report at https://bugs.php.net/bug.php?id=52124&edit=1
ID: 52124
Updated by: cmb@php.net
Reported by: vovan-ve at yandex dot ru
Summary: [strpos] Limit search inside $haystack by new
$length parameter
Status: Open
Type: Feature/Change Request
Package: Strings related
PHP Version: Irrelevant
Block user comment: N
Private report: N
New Comment:
I have some doubts that this functionality is required often
enough to warrant adding it to PHP, considering that it can easily
be implemented in userland (without making a copy of the string):
function strpos_len($haystack, $needle, $offset, $length) {
$pos = strpos($haystack, $needle, $offset);
if ($pos > $offset + $length - strlen($needle)) {
$pos = false;
}
return $pos;
}
Previous Comments:
------------------------------------------------------------------------
[2010-06-19 12:13:02] vovan-ve at yandex dot ru
Description:
------------
Why strpos() does not accept $length parameter with addition to $start? It would be very useful to
search a $needle inside a part of $haystack sometimes. Now such behaviour can be made by combination
with substr():
$string = 'The big string [with some data here] and with more data there';
// searh inside substring from offset 16 with length 19
$tmp = substr($string, 16, 19);
// now real search
$pos = strpos($tmp, 'data');
if (false !== $pos) $pos += 16; // original position
var_dump($pos);
It work, but not optimal due to redundant copy of substring. I don't need this copy, I just
want to reduce searching area.
Test script:
---------------
$string = 'The big string [with some data here] and with more data there';
// search 'data' inside substring from offset 16 with length 19
$pos = strpos($string, 'data', 16, 19);
var_dump($pos);
Expected result:
----------------
int(26)
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=52124&edit=1
Thread (4 messages)