GoneNowBye

so its a pointer?

i've been searching, the gmp library, anyone?

right sorry about my absense, just real life in the way anyway problem: i want to be able to add 0's and 1's to a string in binary, i know thats weird, but i do want to manipulate binary, normally i'd just use an integer, (add 8 to use the 3'rd binary digit as 1 ... so forth) however i need a string which needs to be a practically infinate in potentual length having a string (as in each 0 and 1 being a byte long) and converting that into binary is fine, aslong as it can be reversed. Please help Havok

it also means "here" on these forms, look at the jump to section just above quick reply sorry last one for now

Reading on above, you take n-1 permuations first lets say i have 3 or two infact 1,2 i do 1 first and get 1,2,3,4 then when i get too two what do i do with that list? sorry if this seems dumb [edit] i have been, but it doesn't help that i cant tell how i do it on paper.

Problem there is though, is when you think though it i often thing "equal too or greater then" depending on what i'm solving.... i just know it comes first now anyway goodluck

So whats it actually doing. The main problem i had is i could do it on paper, but not actually describe how i did it if that makes sense?

its also a common error for trying to specify greater then or equal to. and somtimes means "implied" in maths, <= means implied by -> is for class objects.

#My fix may be quicker, but i'm not sure about efficency, *1 thats it that way php treats it as a float if it has a decimal, an integer if its whole.

right i need every posible repeting combonation That is: lets take 4 options, 1,2,3,4 i want 24 (4!) back 1,2,3,4 1,2,4,3 1,3,2,4 1,3,4,2 ... And so forth. Rather then just code, please may you go throgh how i should do it, i have found some code that does it however it uses unfamilure commands, and i'd like to understand....sure i'll get there eventually, but why reincent the wheel. here's my current code - modified from something i found, i dont quite understand whats going on :/ i dont get the for loop (lol i know i should, i've always used while though) i dont get this foreach thing (well i think it progresses through an array index in order it was declared) i dont get this array_splice function I have read PHP's documentation... but another description would be nice Thanks guys: <?php //all functions //************* function getPermutations($length, $sublength, $index, $separator, $start) { $out_pattern = $out_scheme = array(); if ($sublength>$length) $sublength = $length; $max = factorial($length); echo "options = $sublength / $length, factorial = $max <br />"; //for ($a=0; $a<$length; $a++) $options[$a] = $pattern[$a] = $a; for ($a=$start; $a<($length+$start); $a++) $options[$a] = $seq[$a] = $a; for ($x=0; $x<$max; $x++) { $N = $x; for ($i=1; $i<= $length;) { $seq[($length+$start-$i)] = $N % $i; $N = $N/$i; $i++; } unset($perm); $b = $options; $num = 0; foreach($seq as $off) { $char = array_splice($b, $off, 1); $char = $char[0]; $perm[$num] = $char; $num+=1; } $out_pattern[] = $perm; } return $out_pattern; } function factorial($s) { if($s) $r = $s * factorial($s - 1); else $r = 1; return $r; } //Basic example (output of scheme) //******************************** $items=4; //amount of elements $include=4; //amount of elements taken into account $index=1; //output index: 0=scheme with separator, 1=numbers only $separator='-'; //separator char for index=0 $start=1; //first number of scheme $results1 = getPermutations($items, $include, $index, $separator, $start); echo('<pre>'.print_r($results1,true).'</pre>'); ?>

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How would that create a unique ID? " quote The index type is primary - therefore unique. The other question has been explained above.

I have not read any of the above. By default <? is not allowed as an opening tag it must be <?php, this is set as php_short_tags=on/off in php.ini. PHP is never displayed if it is processed as its processed and the result sent to the client.

How can you enter data into the barcode scanner? what happens normally, i dont have one but at the library it just apears next to the cursor.

Then there is no way.

I suppose you could geolocate them, convert the longitude and latitude to cartesian x,y,z then use pythag to get the distance?

never save a formatted time. time in MySQL (unix Epoch) = UNIX_TIMESTAMP() - yeah this works. weirdly not in the query browser, but it does in a code statement. Time in PHP = time() Have fun Also look up the PHP date function there are other functions with it which can get the timestamp out.

PHP exec() google it; i've never used it but i know it exists You are welcome

By Santise he means use "addlashes" on it, and the one that prevents SQL injections. Yes you have it lastly. table names and databases should (but not required) to use them aswell eg SELECT id as `some var with spaces` FROM `some_schema`.`some_table` Another one you should know about btw, is the alternate INSERT syntax (which i prefer) if you want to insert mutliple rows at once, then INSERT .. VALUES () is perfect, but for one row. INSERT `table` SET `this`='that', `foo`='bar' very much like the UPDATE syntax

My experance and my opinion, you are entitled to your own.

np

i used like '%$data[0].... so on use or instead of and.

The absolute image (irrespective of row size - and thus file system) is the limit of the primary key. The Archive format has no primary key, consiquently you may not update records, only add and select (not sure on delete) but it presents near unlimited (if not unlimited) file storage. Also MySQL does split files when they get too large, there is an option for it in the mysql gui tools administrator, but it only apears when it is connected to localhost. (not me being weird, its the server variable page, where you set its starting parameters) if you have a primary key of an integer, i belive the limit is 65365 rows.... i'm really not sure. but the hard limit is the maxium value of the primary key. Hope i helped, pretty sure its all on the MySQL website, just google "mysql integer" or something. if you need something really big and intger use the type bigint its like twice the size (has a 20 in brackets, does that mean 2^20 or 20 digits?) mediumint bout half of integer tinyint ... really small. Goodluck.

*HavokDelta6 plans to solve this in the least words BACKSLASH /solution called escaping, its used with alot of special characters, the command in PHP which adds backslashes to prevent this is the native function: addslashes($data); this can be reversed with stripslashes($data); to get the origonal data out Hope i helped.

Hey, i gtg to bed now so i must be quick i avoid cookies and sessions, i use a session key embedded in the URL for everything. that way its in the get array and you can use some sort of tag [sESSION_KEY] for example and replace at the end of the file. i replaced all my echo's with a function called "output" then processed the result, then echo'ed it. Session keys also mean the user feels alot more secure, as there are no active means of tracking them present.