Req #40182 [Opn->Csd]: Want a function strpos_all with optional parameters

Edit report at https://bugs.php.net/bug.php?id=40182&edit=1 ID: 40182 Updated by: pollita@php.net Reported by: krudtaa at yahoo dot com Summary: Want a function strpos_all with optional parameters -Status: Open +Status: Closed Type: Feature/Change Request -Package: Feature/Change Request +Package: *General Issues Operating System: all PHP Version: 5.2.0 -Assigned To: +Assigned To: pollita Block user comment: N Private report: N New Comment: As noted, this can be trivially accomplished in userspace. Therefore it should be accomplished in userspace. Previous Comments: ------------------------------------------------------------------------ [2017-01-23 13:16:03] narf at devilix dot net -1: function strpos_all($haystack, $needle) { $needle = preg_quote($needle, '#'); return preg_match_all("#{$needle}#", $haystack, $matches, PREG_OFFSET_CAPTURE) ? array_column($matches[0], 1) : false; } ------------------------------------------------------------------------ [2007-01-20 19:26:32] krudtaa at yahoo dot com Description: ------------ I would very much like to see a function that returns all positions of a needle within a haystack. Similar to strpos but named to strpos_all And should return an array with all positions of needle within haystack. Should also be able to take at least two optional parameters as well: one arithmetic operator one number see below for explanation of why and motivation. My specific need is to be able to search a string 5000 chars in length which consist of only zeroes and ones (0 or 1). And I want to get position of all chars set to 1. I read through the comments on www.php.net/strpos and the closest solution I could find to what I wanted was this: $bitvec = str_repeat('1',5000); $posArr = array(); // next two lines from www.php.net/strpos comments $pos=-1; // need this to start on first element while ( ($pos = strpos($bitvec4,'1',$pos+1)) !== false ) $posArr[]=$pos ; The above is worst case. Normally, for my use, the bitvector, $bitvec, would not have all chars set to 1, but it will happen. Using the above code to get all the positions where char = 1 is so much slower compared to if someone could write a function that handles this. IMHO I think this is something many could use. To make this "new" function "strpos_all" even better, if possible, I would like it to be able to pass two other values: one number and one arithmetic operator If these are set then I want the value to be stored in the array element to be (if arithmetic operator was *) Position * number If the new function could NOT do this then, at least I, would have to iterate through all the elements to change the values which again would take a "long" time if done on each element in PHP compared to if done within the "upcoming" strpos_all function. Really hope to see a function that can do this. My goal is to use PHP and database to build a fast Seach Engine using a combination of "vectorspace" and "reversed index". In short I want to do what TBGsearch does with PERL and MYSQL, but using PHP and MYSQL: http://www.tbg.nu/tbgsearch/ The one thing so far that slow my "PHP solution" to much down is the lack of strpos_all string with my suggested optional parameters (one artithmetic operator and one number). Keep up the good work! ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=40182&edit=1