PHP - Findandmodify() Usage In A Function

For example, take a look at this: https://code.google....p/phpwebsocket/   When I run the server, it works fine and I am using the server for my Inventory system on my game. When users drag and drop items in their inventory to change position, it sends the data to the html 5 websocket server, and updates the positions accordingly/etc. And I will use it for a bunch of other stuff later.   My question is: What kind of VPS would I be looking for in terms of ram/cpu power to keep a websocket server like this up 24/7? Is it more memory intensive than socket/io/nodejs? Or what? How can I test these things? Looking at cmd.exe or php.exe in my task manager when having it run on my local windows machine isn't really a good way to test performance, or to estimate how much ram or VPS/CPU power of a server I'll need before launch.  I can get a idea, but I don't think it's going to be close to reality. That's why I'm asking you guys here if you would know.  Thanks
Edited by Monkuar, 17 January 2015 - 12:24 AM.

This topic has been moved to Application Design.

http://www.phpfreaks.com/forums/index.php?topic=320813.0

I have some simple test code:

Code: [Select]
echo memory_get_usage(true);
echo("\n" . '<br />' . "\n");
echo memory_get_usage(false);
echo("\n" . '<br />' . "\n");
echo memory_get_peak_usage();

that prints out the three types of memory usage in bytes for my basic admin page.

All three values are around 2.25 MB in bytes.

What's best practice for PHP memory usage? Is 2.25MB far too much for a single user's visit?

Do these PHP memory values include images in the page?

I was wondering how to resize DIVs based upon their usage. I have some vague ideas of how to do it, but not sure. Basically, the more a user clicks a DIV, the large it becomes relative to all other DIVs (no DIVs ever disappear!)

Any ideas?

I've been doing some benchmarking for memory usage for a very resource-sensitive project I'm doing (that I probably shouldn't be using PHP for, but oh well). I came across something peculiar, and I'm trying to figure out why I get results as I do.

Here is my test file:

<?php
$string_parts = 4;
$max = 10000;
$arr = array();
$i = 0;
$start = memory_get_usage();
for(;$i<$max;$i++){
$arr[] = array_pad(array(), 4, "A");
}
$end = memory_get_usage();
printf("%d iterations, %d bytes in array\n", $max, $end-$start);

$arr2 = array();
$i = 0;
$start2 = memory_get_usage();
for(;$i<$max;$i++){
$arr2[] = array("A", "A", "A", "A");
}
$end2 = memory_get_usage();
printf("%d iterations, %d bytes in array (%.2f%%)\n", $max, $end2-$start2, ($end2-$start2)/($end-$start)*100);
?>


Output on my system:
Code: [Select]
10000 iterations, 4145696 bytes in array
10000 iterations, 5585744 bytes in array (134.74%)
A 35% memory gain for two of the same exact arrays seems really weird. Any information as to why, or perhaps any useful functions or resources would be appreciated.

This topic has been moved to Other Libraries and Frameworks.

http://www.phpfreaks.com/forums/index.php?topic=319964.0

This topic has been moved to Application Design.

http://www.phpfreaks.com/forums/index.php?topic=346818.0

hello and good day

 

first of all:; i hope youre all right and everything goes well at your site;: 

Worpress-Plugin API - giving back the meta-data according the usage of different filters

I'm currently working on a parser to make a small preview on the newest plugins in wordpress. at the moment i think i work from a URL given  out of the range of these:  https://de.wordpress.org/plugins/browse/popular/ - let us say the first 30 to 40 URL-pages.

I'd like to retrieve only the title of the page and https://wordpress.org/plugins/wp-job-manager and https://wordpress.org/plugins/ninja-forms and - let us say the most popular wp-plugins: 

a little chunk of information (a bit of text)

The project: for a list of meta-data of popular wordpress-plugins (cf. https://de.wordpress.org/plugins/browse/popular/ and gathering the first 50 URLs - that are
50 plugins which are of interest! The challenge is: i want to fetch meta-data of all the existing plugins.

What i subsequently want to filter out after the fetch is - those plugins that have the newest timestamp
- that are updated (most) recently. It is all aobut acutality...

https://wordpress.org/plugins/wp-job-manager
https://wordpress.org/plugins/ninja-forms
https://wordpress.org/plugins/participants-database ....and so on and so forth.

see the source: https://wordpress.org/plugins/wp-job-manager/ we have the following set of meta-data for each wordpress-plugin:
 

Version: 1.9.5.12
installations: 10,000+    
WordPress Version: 5.0 or higher
Tested up to: 5.4 PHP  
Version: 5.6 or higher    
Tags 3 Tags: database member sign-up form volunteer
Last updated: 19 hours ago
plugin-ratings

but as i saw today: there we have a api that can be used for this purpose too: the Wordpress-Plugins-API 

cf: https://developer.wordpress.org/reference/functions/plugins_api/


Browse: Home / Reference / Functions / plugins_api()
plugins_api( string $action, array|object $args = array() )
Retrieves plugin installer pages from the WordPress.org Plugins API.

Description #Description
It is possible for a plugin to override the Plugin API result with three filters. Assume this is for plugins, which can extend on the Plugin Info to offer more choices. This is very powerful and must be used with care when overriding the filters. The first filter, ‘plugins_api_args’, is for the args and gives the action as the second parameter. The hook for ‘plugins_api_args’ must ensure that an object is returned. The second filter, ‘plugins_api’, allows a plugin to override the WordPress.org Plugin Installation API entirely. If $action is ‘query_plugins’ or ‘plugin_information’, an object MUST be passed. If $action is ‘hot_tags’ or ‘hot_categories’, an array MUST be passed. Finally, the third filter, ‘plugins_api_result’, makes it possible to filter the response object or array, depending on the $action type.

Supported arguments per action

(object|array|WP_Error) Response object or array on success, WP_Error on failure. See the function reference article for more information on the make-up of possible return values depending on the value of $action.

 

+--------------------+---------------+--------------------+----------+----------------+
|                    |               |                    |          |                |
+--------------------+---------------+--------------------+----------+----------------+
| Argument Name      | query_plugins | plugin_information | hot_tags | hot_categories |
| $slug              | No            | Yes                | No       | No             |
| $per_page          | Yes           | No                 | No       | No             |
| $page              | Yes           | No                 | No       | No             |
| $number            | No            | No                 | Yes      | Yes            |
| $search            | Yes           | No                 | No       | No             |
| $tag               | Yes           | No                 | No       | No             |
| $author            | Yes           | No                 | No       | No             |
| $user              | Yes           | No                 | No       | No             |
| $browse            | Yes           | No                 | No       | No             |
| $locale            | Yes           | Yes                | No       | No             |
| $installed_plugins | Yes           | No                 | No       | No             |
| $is_ssl            | Yes           | Yes                | No       | No             |
| $fields            | Yes           | Yes                | No       | No             |
+--------------------+---------------+--------------------+----------+----------------+

well  - i guess i can use this API for the above mentioned aims too?

look forward to hear from you 

regards dil_Bert

 

cf: https://developer.wordpress.org/reference/functions/plugins_api/

see the reference list  :
 

$fields = array(
    'active_installs' => true,           // rounded int
    'added' => true,                     // date
    'author' => true,                    // a href html
    'author_block_count' => true,        // int
    'author_block_rating' => true,       // int
    'author_profile' => true,            // url
    'banners' => true,                   // array( [low], [high] )
    'compatibility' => false,            // empty array?
    'contributors' => true,              // array( array( [profile], [avatar], [display_name] )
    'description' => false,              // string
    'donate_link' => true,               // url
    'download_link' => true,             // url
    'downloaded' => false,               // int
    // 'group' => false,                 // n/a
    'homepage' => true,                  // url
    'icons' => false,                    // array( [1x] url, [2x] url )
    'last_updated' => true,              // datetime
    'name' => true,                      // string
    'num_ratings' => true,               // int
    'rating' => true,                    // int
    'ratings' => true,                   // array( [5..0] )
    'requires' => true,                  // version string
    'requires_php' => true,              // version string
    // 'reviews' => false,               // n/a, part of 'sections'
    'screenshots' => true,               // array( array( [src],  ) )
    'sections' => true,                  // array( [description], [installation], [changelog], [reviews], ...)
    'short_description' => false,        // string
    'slug' => true,                      // string
    'support_threads' => true,           // int
    'support_threads_resolved' => true,  // int
    'tags' => true,                      // array( )
    'tested' => true,                    // version string
    'version' => true,                   // version string
    'versions' => true,                  // array( [version] url )
);

 

what do you say-!?

Hey guys, I can't wrap my head around how to make this work right...

I have three tables:
Code: [Select]
CREATE TABLE `games` (
  `g_id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(150) DEFAULT NULL,
  PRIMARY KEY (`g_id`));

CREATE TABLE IF NOT EXISTS `game_player` (
  `r_id` int(11) NOT NULL AUTO_INCREMENT,
  `p_id` int(11) DEFAULT NULL,
  `g_id` int(11) DEFAULT NULL,
  `bool` int(1) NOT NULL DEFAULT '0',
  PRIMARY KEY (`r_id`));

CREATE TABLE IF NOT EXISTS `players` (
  `p_id` int(11) NOT NULL AUTO_INCREMENT,
  `playerid` varchar(150) NOT NULL,
  PRIMARY KEY (`p_id`),
  UNIQUE KEY `playerid` (`playerid`));

The players table is my list of users, and they're tied to the list of games via the game_player table.

So here's my issue... I'm trying to show the full list of games, and then check mark each record where the player does play it. 
This is what I have so far - it shows all the games,  but it's not checking the boxes.

Code: [Select]
$result = mysql_query("SELECT * FROM games") or die(mysql_error());
while($row = mysql_fetch_array($result))
{
$newquery = "SELECT * FROM game_player, players
WHERE game_player.p_id = players.p_id
AND game_player.g_id = ".$row['g_id']. "
AND players.playerid = {$userid}";
$query = mysql_query($newquery) or die(mysql_error());
if($query['bool'] == 1) { $set_checked = " CHECKED";
}
else{ $set_checked = "";
}
echo "<input type=\"checkbox\" name=\"box1\" value=\"".$query['g_id']."\"" . $set_checked . "/>".$row['name']."<br />\n";
}

Hello all, I have some piece of code that is nested like this


$variable = 'This is a global argument';
function parentFunction($variable) {
function childFunction() {
echo 'Argument of the parent function is '.$GLOBALS['variable'];
}
childFunction();
}
parentFunction(5);


What I want to know is - Is there a way to access a variable from the parent function without passing arguments to the child function? (Something like how classes have parent::?). I don't want to use $GLOBALS because it might cause some variable collision, and I didn't want to pass arguments because incase I decide to change the arguments in the parent function I'd have to do it in the child function aswell. From my searching around in the Internet it seems like this is not possible, but if theres a slight chance that there might be something out there, i'm willing to give it a shot .

Thanks in advance

I have this function completely written in my class file that I am working on.  The point to this function is to be able to check the login of a user or administrator for either of the control panels associated with my site.

It will check the session intime as well as the page / module referenced.  Once it passes all those checks, it will check and ensure the emailaddress/password stored in the current session still holds true and the account is still active...  if the account is still active it will update the lastActivity as well as update all of the session variables with what is currently in the database.

What I am looking for is basically a look at the function, see if it looks good..  If there is any part to it that could create security holes for the site just off the login function itself...

Usage: $q->validUser($_SESSION['user'], $_mod);

<?php
 function validUser($sess, $p) {

if ($sess['inTime'] == '' && $p != 'login' && $p != 'logout') {
session_destroy();
$login = '0';
$_int = '';
return $login;
} else if ($sess['inTime'] < time()-3600 && $p != 'login') {
$sess['inTime'] = '';
session_destroy();
$this->check_login($sess, $p);
} else {
$this->user = $sess['emailAddress'];
$this->pass = $sess['password'];

$login = $this->sql_query("SELECT * FROM users WHERE emailAddress = '".$this->user."' AND password = '".$this->pass."' 
   AND status = '1' LIMIT '1'");
if ($login = $this->sql_numrows($login) < 1) {
$sess['inTime'] == '';
session_destroy();
$login = '0';
} else {
// logged in, lets update the database for last_activity AND the session.

$this->sql_query("UDATE users SET lastActivity = '".now()."' WHERE
  emailAddress = '".$this->user."'");
$login = $this->sql_query("SELECT * FROM users WHERE emailAddress = '".$this->user."' AND password = '".$this->pass."' 
       AND status = '1' LIMIT '1'");
$login = mysql_fetch_assoc($login);
foreach ($login as $key => $value)
{ 
$sess[$key] = $value;
}
$sess['inTime'] = time();
$login = '1';
}
return $login;
}
}

?>

That is the main function, sql_query and sql_numrows is:

<?php
function sql_query($query = "", $transaction = FALSE) {
unset($this->query_result);

if ($query != "") {
$this->num_queries++;
if ($transation == BEGIN_TRANSACTION && !$this->in_transation) {
$result = mysql_query("BEGIN", $this->db_connect_id);
if (!$result) {
return false;
}
$this->in_transaction = TRUE;
}

$this->query_result = mysql_query($query, $this->db_connect_id);
} else {
if ($transaction == END_TRANSACTION && $this->in_transaction ) {
$result = mysql_query("COMMIT", $this->db_connect_id);
}
}
if ($this->query_result) {
unset($this->row[$this->query_result]);
unset($this->rowset[$this->query_result]);

if ($transaction == END_TRANSACTION && $this->in_transaction ) {
$this->in_transaction = FALSE;
if (!mysql_query("COMMIT", $this->db_connect_id)) {
mysql_query("ROLLBACK", $this->db_connect_id);
return false;
}
}
return $this->query_result;
} else {
if ($this->in_transaction ) {
mysql_query("ROLLBACK", $this->db_connect_id);
$this->in_transaction = FALSE;
}
return false;
}
}

function sql_numrows($query_id = 0) {
if(!$query_id) {
$query_id = $this->query_result;
}
return ($query_id) ? mysql_num_rows($query_id) : false;
} ?>

Any insight that can help to benefit these functions would be appreciated.

Question 1) Is the only and proper way to call a parent function "parent::function()"?  Are there other/better ways from within a child function?

Question 2) What are the deciding factors for when to make a function or attribute static?  How do you make that decision?  Assuming 5.3...

Thanks.

I need to call usort from a class function, and I'm puzzled about how to define the comparison function.

I've tried to define the comparison function in the same class, but I can't get usort to call it. I found one hint that it will work if I make the comparison function static, but I tried that, and it didn't work for me.

If I define the comparison function outside the class, it won't have access to object properties that it needs to operate.

The only solution I can think of is to define the comparison function outside the class and put the object properties it needs in globals. Is there a cleaner way to do this?

When I put this chunk of code into it's own function:


function fetch_all ($dbc, $query) {

include ('knuffix_list_func.php');

pagination_start ($dbc, $query);

$offset = $pag_array[0];

$rows_per_page = $pag_array[1];

$query = $query . " LIMIT $offset, $rows_per_page";

echo "test query: " . $query;

knuffix_list ($query, $dbc);

pagination_end ($pag_array);
}


And when I echo out the query as you can see in the example, then I notice that the variables $offset and $rows_per_page never get appended.
I set the variable $pag_array to a global inside the function pagination_start(). It usually works when I DON'T wrap a function around this chunk of code, but if I do wrap a function around everything then the global suddenly won't work anymore.

Btw, this also won't work if I wrap a function around the function DECLARATIONS.

Any ideas, how I could make it work?

I want to define a function instead of repeating query in all my php pages. I call a function by passing an $id value and from that function i have to get all the info related to that id, like name, description and uom.    I am trying to do this, but i dont know how to get these values seperately.   here is my function  

function items($item_id)
{
$details = array(); 
$result = mysql_query("select item_id, name, uom, description from items where item_id=".$item_id."") or die (mysql_error());
while($row = mysql_fetch_array($result))
{
$details[] = array((stripslashes($row['name'])), (stripslashes($row['uom'])), (stripslashes($row['description'])));
}
return $details;
}

and i call my function like this

$info = items($id);

Can somebody guide me in this