From:             
Operating system: 
PHP version:      Irrelevant
Package:          Strings related
Bug Type:         Feature/Change Request
Bug description:[strpos] Limit search inside $haystack by new $length parameter

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)


-- 
Edit bug report at http://bugs.php.net/bug.php?id=52124&edit=1
-- 
Try a snapshot (PHP 5.2):            
http://bugs.php.net/fix.php?id=52124&r=trysnapshot52
Try a snapshot (PHP 5.3):            
http://bugs.php.net/fix.php?id=52124&r=trysnapshot53
Try a snapshot (trunk):              
http://bugs.php.net/fix.php?id=52124&r=trysnapshottrunk
Fixed in SVN:                        
http://bugs.php.net/fix.php?id=52124&r=fixed
Fixed in SVN and need be documented: 
http://bugs.php.net/fix.php?id=52124&r=needdocs
Fixed in release:                    
http://bugs.php.net/fix.php?id=52124&r=alreadyfixed
Need backtrace:                      
http://bugs.php.net/fix.php?id=52124&r=needtrace
Need Reproduce Script:               
http://bugs.php.net/fix.php?id=52124&r=needscript
Try newer version:                   
http://bugs.php.net/fix.php?id=52124&r=oldversion
Not developer issue:                 
http://bugs.php.net/fix.php?id=52124&r=support
Expected behavior:                   
http://bugs.php.net/fix.php?id=52124&r=notwrong
Not enough info:                     
http://bugs.php.net/fix.php?id=52124&r=notenoughinfo
Submitted twice:                     
http://bugs.php.net/fix.php?id=52124&r=submittedtwice
register_globals:                    
http://bugs.php.net/fix.php?id=52124&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=52124&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=52124&r=dst
IIS Stability:                       
http://bugs.php.net/fix.php?id=52124&r=isapi
Install GNU Sed:                     
http://bugs.php.net/fix.php?id=52124&r=gnused
Floating point limitations:          
http://bugs.php.net/fix.php?id=52124&r=float
No Zend Extensions:                  
http://bugs.php.net/fix.php?id=52124&r=nozend
MySQL Configuration Error:           
http://bugs.php.net/fix.php?id=52124&r=mysqlcfg

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