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?

No comments posted yet

Your Answer:

Login to answer
136 Like 17 Dislike
Previous forums Next forums
Other forums

Limiting uploaded file type
Hi. First post here
I am working on a simple upload script, and I need it to limit the allowed f

db entry based on primary key
My "topics" table contains 10 entires
*--------------*
topicid topic
------

close site for maintenance
i get a tutorial, saying the following code can put our site offline, and only the developer can vie

How can use this array as a key?
Say I have this array for example:


print_r($array);

Prints:
Code: [Select]Array

Help please - How to validate from 2 possible answers
Hi

I hope somebody can help me with what will probably be really simple, I'm pulling my hair

help understanding hidden input w/ php
hello i'm doing a tutorial where there are multiple forms for an edit page for a user to update thei

ldap connection
We are using ldap to get user information from the domain controller. It was working before. Recentl

Call db table from any PHP file
Hi,

I want to be able to call a database table that will be setup in another file called init

I need some help with the IF command...
I have a large number of images in one section of my website with the .jpg format. I'm adding a bun

Compare user input to flat file data
Help...Am a complete newbie to programming so my code is prolly quite long. Am trying to verify a us

Sign up to write
Sign up now if you have flare of writing..
Login   |   Register
Follow Us
Indyaspeak @ Facebook Indyaspeak @ Twitter Indyaspeak @ Pinterest RSS



Play Free Quiz and Win Cash