Why Are These Functions Causing MASSIVE Memory Problems? Please Help!

Posted on 16th Feb 2014 07:03 pm by admin

Hi,

I have a script with some options.

I use regex to replace patterns in strings, but I seem to be using them incorrectly, because they very quickly break my max_memory_limit (by several orders of magnitude)

This is strange, because I'm dealing with maybe 10 simultaneous strings of 500 words max.

I'm clearly causing some kind of overly recursive syntax, but I can't see how...

Any help you could give me to programme this better (or tell me where I'm going wrong) would be most appreciated

Code: [Select]

$string = "this would be about 500 words long";
$parts = $string; // $parts would normally be a substring of $string;

wp_wordmash($parts);
wp_synonymize($string);
wp_keyword2url($string);

//html stuff follows here...


function wp_wordmash($parts) {

$wordlist = file_get_contents('dictionary.txt', true);
$dictionary = explode(",", $wordlist);
$htmldictionary = array();
foreach($dictionary as $dicword) {
$htmldictionary[] = wp_htmlcode($dicword);
$htmldictionary_u[] = wp_htmlcode(strtoupper($dicword));
$htmldictionary_u1[] = wp_htmlcode(ucfirst($dicword));
$htmldictionary_ucwords[] = wp_htmlcode(ucwords($dicword));
}
for($i=0;$i<count($dictionary);$i++){

$parts = preg_replace("/b$dictionary[$i]b/", $htmldictionary[$i], $parts);
$parts = preg_replace("/b" . strtoupper($dictionary[$i]) . "b/", $htmldictionary_u[$i], $parts);
$parts = preg_replace("/b" . ucfirst($dictionary[$i]) . "b/", $htmldictionary_u1[$i], $parts);
$parts = preg_replace("/b" . ucwords($dictionary[$i]) . "b/", $htmldictionary_ucwords[$i], $parts);
}
return $parts;
}

function wp_htmlcode($string) {

$buffer= NULL;
for($i=0;$i<strlen($string);$i++) {
$buffer .= "&#" . ord($string{$i}) . ";";
}
return $buffer;
}

function wp_synonymize($string){

$buffer=$string;
$synonymfile = file_get_contents('synonyms.txt', true);
$synonyms = explode("n", $synonymfile);
for($i=0;$i<count($synonyms);$i++){
$synonymlist = explode(",", $synonyms[$i]);
$oldword = $synonymlist[0];
$synonym = $synonymlist[1];
$synonym = str_replace("r", '', $synonym);
$buffer = preg_replace("/b$oldwordb/", $synonym, $buffer);
$buffer = preg_replace("/b" . strtoupper($oldword) . "b/", strtoupper($synonym), $buffer);
$buffer = preg_replace("/b" . ucfirst($oldword) . "b/", ucfirst($synonym), $buffer);
$buffer = preg_replace("/b" . ucwords($oldword) . "b/", ucwords($synonym), $buffer);
}
return $buffer;
}

function wp_keyword2url($string){

$buffer=$string;
$keyword2urlfile = file_get_contents('keyword2url.txt', true);
$keywords = explode("n", $keyword2urlfile);
for($i=0;$i<count($keywords);$i++){
$keywordlist = explode(",", $keywords[$i]);
$keyword = $keywordlist[0];
$url = $keywordlist[1];
$url = str_replace("r", '', $url);
$buffer = preg_replace("/b$keywordb/", '<a href = "' . $url . '">' . $keyword . '</a>', $buffer);
$buffer = preg_replace("/b" . strtoupper($keyword) . "b/", '<a href = "' . $url . '">' . strtoupper($keyword) . '</a>', $buffer);
$buffer = preg_replace("/b" . ucfirst($keyword) . "b/", '<a href = "' . $url . '">' . ucfirst($keyword) . '</a>', $buffer);
$buffer = preg_replace("/b" . ucwords($keyword) . "b/", '<a href = "' . $url . '">' . ucwords($keyword) . '</a>', $buffer);
}
return $buffer;
}
As I say, the string passed to these functions is typically < 500 words.

I've also included the comparison files (dictionary.txt, synonyms.txt and keyword2URL.txt)...HERE


I hope you can help...I'm 99% certain I'm using preg_replace() wrong...because if I substitute it with str_replace() then my memory issues disappear.

Problem is, I like preg_replace because it gives me the word border functionality.

I'm just obviously doing it wrong!

Any thoughts?

Your Answer:

Login to answer

Other forums

How to read CSS message data
Hi,
I have a requirement here. When working as a Dev angel for multiple customers its really di

radio button reamains checked
Hello i'm trying to keep the state off my radio buttons so it shows which ones where clicked after t

Putting double spaces instead of single spaces
Im looking at trying to replace all single spacing between fields with double spacing

At pres

Undefined offset when using a flat file with pipe symbols
Hi, I've got a flat file/text file which I'm currently using as a member database for my site (not a

UPLOAD IMAGES NOT WORKING!
Hi there i have a upload script in which it uploads the picture to a folder than creates two thumbna

Table Control
Hi Guru's,

I've created a Module pool program, which contains the Table Control.

cURL Upload Help
OK, I am creating a bridge from a local program to my website and I am trying to find the best way t

Adding delete feature to my forum
Hello I am currently trying to add a delete feature to my forum. I believe I have everything built r

Tournament Brackets (Double Elimination)?
Is making a double elimination tournament style bracket system capable of being done in php?

Final year project, please point me in the right direction
hi there for my final year project I'm aiming to build a php script shell to use as an expert system