PHP - Memory Issue?

Hello Guys,
I wanted to know what is memory leakage? Where we have to takecare of ? How to avoid this thing?

Hey guys i have been making a website where friends can post on each others profiles like facebookish anyways im not sure if this is th ebest way to do it but i have this below its part of the code that pulls all the friends of the member from the database::

$query_friend = mysql_query("SELECT my_id,friend_id FROM site_friends WHERE my_id='$my_id'");
while($row = mysql_fetch_assoc($query_friend)){
$friend_id = $row['friend_id'];
}

then i pass it into a function blah blah not got that for yet anyway what happens if this person ends up having 100s of friends will this be harsh on the servers memory?

or should i not worry to much ? hope someone can help thanks!!

I have osTicket  installed on a Centos 5 Os with php5.3.3 I upgraded the osTicket from v1.9.1 to 1.9.4   I now get the following mail when I create a ticket by mailing in the support ticket   This is the mail system at host mail.mydomain.com.   I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.   For further assistance, please send mail to <postmaster>   If you do so, please include this problem report. You can delete your own text from the attached returned message.                      The mail system   <support@mydomain.com>: Command died with status 255: "/usr/bin/php -q     /var/www/html/support/api/pipe.php". Command output: PHP Fatal error:     Allowed memory size of 268435456 bytes exhausted (tried to allocate 76     bytes) in /var/www/html/support/include/class.osticket.php on line 261 PHP     Warning:  Unknown: Error occured while closing statement in Unknown on line     0   The osticket guys have pointed out to me that this is a php error, but I never made any changes to the php config   When I increase the memory in php.ini to 512Mb or even 1024Mb the error persists. Anyone have any ideas of whether the memory is set/can be set somewhere else or overriding what is in php.ini ?    

I have this method that puts files into a zip file from an array list, it looks like this:
public function zip($files = array(), $maxMB = 2, $flag = ZIP_NEW){
$this->memory_size = $maxMB * 1024 * 1024;
$zip_id = $this->zip_id;
$this->zip[] = new ZipArchive();
$this->zip_id++;
if($flag == ZIP_NEW){
$open = $this->zip[$zip_id]->open("php://temp/maxmemory:$this->memory_size", ZipArchive::CREATE);
$files = (array)$files;
if(!empty($files)){
foreach($files as $file){
if(is_file($file)){
$this->zip[$zip_id]->addFile($file);
}
}
}
$this->zip[$zip_id]->close();
}
$this->function_name = __FUNCTION__;
return $this;
}

I then download them like this:
public function download($download_data, $download_name, $type = DOWNLOAD_FILE){
header("Pragma: public;");
header("Expires: 0;");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0;");
header("Content-Type: application/force-download;");
header("Content-Type: application/octet-stream;");
header("Content-Type: application/download;");
header("Content-Transfer-Encoding: binary;");
header("Content-Disposition: attachment; filename=$download_name;");
if($type == DOWNLOAD_FILE){
header("Content-Length: ".filesize($download_data).";");
if($download_data == PHP_MEMORY){
$handle = fopen(PHP_MEMORY."/maxmemory:$this->memory_size", 'r+');
echo stream_get_contents($handle);
}else{
readfile($download_data);
}
}elseif($type == DOWNLOAD_STRING){
header("Content-Length: ".mb_strlen($download_data).";");
echo $download_data;
}
$this->function_name = __FUNCTION__;
return $this;
}

When I run this code:
$files = array("file1.php","file2.php");
$live->zip($files)->download(PHP_MEMORY, "download.zip");

It downloads the file, the only problem is, is that when I open the file I get an error saying the file can not be opened. I know when I actually save it to a file instead of in memory it works. So, I am not sure if it isn't working in the download portion or the create file portion, as I have never worked with php://temp before. Any thoughts on why this doesn't work when using php://temp?

Hello,

So I am trying to reduce my memory footprint to the lowest possible value without sacrificing functionality.

I noticed that if I write a comment that is 2kb long, it costs me 2kb more memory to run the script.

How can I get PHP to free the memory taken up by comments? It seems like it would be a real pain in the butt to have to run php -w on all my source files each time I update my server.

Any ideas?

Thanks.

David

I have stepped into more than one project with a function similar to the following:

Code: [Select]
<?
/**
 * xml2array() will convert the given XML text to an array in the XML structure.
 * Link: http://www.bin-co.com/php/scripts/xml2array/
 * Arguments : $contents - The XML text
 *                $get_attributes - 1 or 0. If this is 1 the function will get the attributes as well as the tag values - this results in a different array structure in the return value.
 *                $priority - Can be 'tag' or 'attribute'. This will change the way the resulting array sturcture. For 'tag', the tags are given more importance.
 * Return: The parsed XML in an array form. Use print_r() to see the resulting array structure.
 * Examples: $array =  xml2array(file_get_contents('feed.xml'));
 *              $array =  xml2array(file_get_contents('feed.xml', 1, 'attribute'));
 */
function xml2array($contents, $get_attributes=1, $priority = 'tag') {
    if(!$contents) return array();

    if(!function_exists('xml_parser_create')) {
        //print "'xml_parser_create()' function not found!";
        return array();
    }

    //Get the XML parser of PHP - PHP must have this module for the parser to work
    $parser = xml_parser_create('');
    xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8"); # http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss
    xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
    xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
    xml_parse_into_struct($parser, trim($contents), $xml_values);
    xml_parser_free($parser);

    if(!$xml_values) return;//Hmm...

    //Initializations
    $xml_array = array();
    $parents = array();
    $opened_tags = array();
    $arr = array();

    $current = &$xml_array; //Refference

    //Go through the tags.
    $repeated_tag_index = array();//Multiple tags with same name will be turned into an array
    foreach($xml_values as $data) {
        unset($attributes,$value);//Remove existing values, or there will be trouble

        //This command will extract these variables into the foreach scope
        // tag(string), type(string), level(int), attributes(array).
        extract($data);//We could use the array by itself, but this cooler.

        $result = array();
        $attributes_data = array();
       
        if(isset($value)) {
            if($priority == 'tag') $result = $value;
            else $result['value'] = $value; //Put the value in a assoc array if we are in the 'Attribute' mode
        }

        //Set the attributes too.
        if(isset($attributes) and $get_attributes) {
            foreach($attributes as $attr => $val) {
                if($priority == 'tag') $attributes_data[$attr] = $val;
                else $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr'
            }
        }

        //See tag status and do the needed.
        if($type == "open") {//The starting of the tag '<tag>'
            $parent[$level-1] = &$current;
            if(!is_array($current) or (!in_array($tag, array_keys($current)))) { //Insert New tag
                $current[$tag] = $result;
                if($attributes_data) $current[$tag. '_attr'] = $attributes_data;
                $repeated_tag_index[$tag.'_'.$level] = 1;

                $current = &$current[$tag];

            } else { //There was another element with the same tag name

                if(isset($current[$tag][0])) {//If there is a 0th element it is already an array
                    $current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;
                    $repeated_tag_index[$tag.'_'.$level]++;
                } else {//This section will make the value an array if multiple tags with the same name appear together
                    $current[$tag] = array($current[$tag],$result);//This will combine the existing item and the new item together to make an array
                    $repeated_tag_index[$tag.'_'.$level] = 2;
                   
                    if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
                        $current[$tag]['0_attr'] = $current[$tag.'_attr'];
                        unset($current[$tag.'_attr']);
                    }

                }
                $last_item_index = $repeated_tag_index[$tag.'_'.$level]-1;
                $current = &$current[$tag][$last_item_index];
            }

        } elseif($type == "complete") { //Tags that ends in 1 line '<tag />'
            //See if the key is already taken.
            if(!isset($current[$tag])) { //New Key
                $current[$tag] = $result;
                $repeated_tag_index[$tag.'_'.$level] = 1;
                if($priority == 'tag' and $attributes_data) $current[$tag. '_attr'] = $attributes_data;

            } else { //If taken, put all things inside a list(array)
                if(isset($current[$tag][0]) and is_array($current[$tag])) {//If it is already an array...

                    // ...push the new element into that array.
                    $current[$tag][$repeated_tag_index[$tag.'_'.$level]] = $result;
                   
                    if($priority == 'tag' and $get_attributes and $attributes_data) {
                        $current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
                    }
                    $repeated_tag_index[$tag.'_'.$level]++;

                } else { //If it is not an array...
                    $current[$tag] = array($current[$tag],$result); //...Make it an array using using the existing value and the new value
                    $repeated_tag_index[$tag.'_'.$level] = 1;
                    if($priority == 'tag' and $get_attributes) {
                        if(isset($current[$tag.'_attr'])) { //The attribute of the last(0th) tag must be moved as well
                           
                            $current[$tag]['0_attr'] = $current[$tag.'_attr'];
                            unset($current[$tag.'_attr']);
                        }
                       
                        if($attributes_data) {
                            $current[$tag][$repeated_tag_index[$tag.'_'.$level] . '_attr'] = $attributes_data;
                        }
                    }
                    $repeated_tag_index[$tag.'_'.$level]++; //0 and 1 index is already taken
                }
            }

        } elseif($type == 'close') { //End of tag '</tag>'
            $current = &$parent[$level-1];
        }
    }
   
    return($xml_array);
}
?>
The strange thing is, this function seems to be used a lot, I even started using it. The issue however, is memory.  When the xml is anymore than a small size, it causes out of memory errors while trying to use this function. Does anyone have a similar alternative that is better on the memory?

Hi:

Is this the correct way to do a memory form for a checkbox?

Code: [Select]
<input name="status[]" id="pending" value="<?=$_POST['pending'] ?>" type="checkbox"  />

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.

Hi all,

When I run the script from browser, it loads fine but when I want it to run from cronjob, it gives memory exhausted error each time cron runs. What do you think about this? What are your solutions?

Here is the error:
"Allowed memory size of 67108864 bytes exhausted (tried to allocate 5307694 bytes) in ...."

Here are the server limits:
max_execution_time = 7200
max_input_time = 600
memory_limit = 1024M

Thanks.

Hi,
I'm getting following error on my website
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 36000000 bytes) in /var/www/vhosts/celebratingart.com/1DEV_CELEBRATINGART/judges/phpimageeditor/classes/phpimageeditor.php on line 652

I tried to increase memory limit to 256M but invain.
Please Help

Hi.  I am working with some rather large files.  Sometimes I am just opening a file and trying to find an entry on a single line.  Sometimes I am opening a file and working on each line.   Whats the most efficient way to work with a large file?   If I open a file, and place all lines into an array, I will use a lot of memory.   If I open a file, and work on it line by line, I should use much less memory, but will the process take longer?   Whats most efficient?   I have underlined my main question above.   Thanks :-)  

I have a PHP script, that should be simple ... it just reads some filenames from a CSV file and copies the associated files to a location,  but due to my lack of skill it is HUNGRY!  This sucker eats like 400M of RAM and then dies.

What am I doing wrong?  This seems like a simple thing ..

Here's the code:

<?php

ignore_user_abort(true);

/**
 * Tell WordPress we are doing the CRON task.
 *
 * @var bool
 */
if (!defined('ABSPATH')) {
    /** Set up WordPress environment */
    require_once('./wp-load.php');
}

if (count($argv) < 2) die();

$filename = $argv[1];

$filenamearr = explode('.', $filename);
$extensionarr = array('csv', 'CSV');

if (in_array($filenamearr[count($filenamearr) - 1], $extensionarr)) {
    $destination_path = ABSPATH . "vielerets/data/";
   
    if (!file_exists($destination_path)) {
        mkdir($destination_path, 0777);
    }
   
    $target_path = $destination_path . $filename;
    $csv_target_path = $target_path;
       
   $fd = fopen ($target_path, "rt");
   
   if (!$fd) die();   
   if (!feof ($fd)) $buffer = fgetcsv($fd, 4096);
   $rowcount = 0;
   $last_postid = 0;
   $pre = -1;
   while (!feof ($fd))   {
            try{
      $buffer = fgetcsv($fd, 4096);            
      if (count($buffer) < 4) continue;
      $rowcount++;
      
      if ($pre != $buffer[0]) {
         $pre = $buffer[0];
         //The Query
         query_posts('meta_key=sysid&meta_value='.$buffer[0]);

         //The Loop
         if ( have_posts() ) {
            the_post();
            $last_postid = get_the_ID();
            echo "update property images: $last_postid\n";
            wp_reset_query();
         }
         else {
            wp_reset_query();
            continue;
         }
      }
      
      $menu_order = 0;
      $image_folder_name = 'property/';
      
      if($buffer[3])
      {
         $image_name = $buffer[3];
         $menu_order = $buffer[1];
         $image_name_arr = explode('/',$image_name);
         $img_name = $image_name_arr[count($image_name_arr)-1];
         $img_name_arr = explode('.',$img_name);
         $post_img = array();
         $post_img['post_title'] = $img_name_arr[0];
         $post_img['post_status'] = 'attachment';
         $post_img['post_parent'] = $last_postid;
         $post_img['post_type'] = 'attachment';
         $post_img['post_mime_type'] = 'image/jpeg';
         $post_img['menu_order'] = $menu_order;
         $last_postimage_id = wp_insert_post( $post_img );
         update_post_meta($last_postimage_id, '_wp_attached_file', $image_folder_name.$image_name);               
         $post_attach_arr = array(
                        "width"   =>   580,
                        "height" =>   480,
                        "hwstring_small"=> "height='150' width='150'",
                        "file"   => $image_folder_name.$image_name,
                        );
         wp_update_attachment_metadata( $last_postimage_id, $post_attach_arr );
                        unset($post_img);
                        unset($post_attach_arr);
         echo " add images: $img_name\n";
      }
                unset($buffer);
            } catch (Exception $ex) {
                echo "$rowcount\n";
            }
   }
   echo "image csv uploaded successfully\n";   
   echo "Total of $rowcount records inserted\n";
   }
?>

// in this case, $teams_count = 16
for($j = $tournament->teams_count; $j != 1; $j/2)
{
echo $j;
}


What I expect:
16 | 8 | 4 | 2 | 1

What I get: memory exhaustion.
Code: [Select]
PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 128716801 bytes)

Is it so late, I'm missing something?

Hi, I am trying to create a login system in PHP, but I am not the greatest at PHP so I am using a source code which I found online as I found it to be more secure as it uses things like salted passwords. Anyway I am trying to add more fields to the register system so it adds them to the mysql, the source has a way to do this with arrays, but it is quite complicated so I am just using variables from the original file. There are 2 files: register.php and class.loginsys.php which contains all the functions. At first the query syntax was incorrect so I decided to use the variables created in register.php in the class.loginsys, but now it's giving me an out of memory error:
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 28672 bytes) in C:\xampp\htdocs\ls\class.loginsys.php on line 34    Which I am unsure of how to fix. I have tried using different variable names, checking the line, checking the whole register.php file for anything rogue. Here is the code:  Top part of register.php 

<?php
include "config.php";
?>

Config.php: 

<?php
require "class.loginsys.php";
$LS=new LoginSystem();
?>

Then actual register part from register.php: 

<?php
	   	if( isset($_POST['submit']) ){
	   			$firstname2 = $_POST['firstname'];
	   			$lastname2 = $_POST['lastname'];
	    		$user2	 = $_POST['username'];
	    		$sex2 = $_POST['sex'];
	    		$country2 = $_POST['strCountryChoice'];
	    		$email2 = $_POST['email'];
	    		$pass2	 = $_POST['pass'];
	    		$pass3 = $_POST['pass2'];
	    		$birthdate2 = $_POST['birthdate'];
	    		$created2 = date("Y-m-d H:i:s");
	    		//need to add a lot more validation functions.. AKA Check if email exists and username. Password > 5 chars
	    		if( $user2=="" || $email2=="" || $pass2=='' || $pass3=='' || $firstname2=='' || $lastname2=='' || $sex2=='' || $country2=='' || $birthdate2=='' ){
	     			echo "Fields Left Blank","Some Fields were left blank. Please fill up all fields.";
	     			exit;
	    		}
	    		if( !$LS->validEmail($email2) ){
	     			echo "E-Mail Is Not Valid", "The E-Mail you gave is not valid";
	     			exit;
	    		}
	    		if( !ctype_alnum($user2) ){
	     			echo "Invalid Username", "The Username is not valid. Only ALPHANUMERIC characters are allowed and shouldn't exceed 10 characters.";
	     			exit;
	    		}
	    		if($pass2 != $pass3){
		     		echo "Passwords Don't Match","The Passwords you entered didn't match";
	     			exit;
	    		}
   	 		$createAccount2 = $LS->register($user2, $pass2,
	    			array(
	    				"email" 	 => $email2,
	    				"name" 	 => $firstname2,
	    				"lastname" => $lastname2,
	    				"gender" => $sex2,
	    				"country" => $country2,
	    				"DOB" => $birthdate2,
	    				"created" => date("Y-m-d H:i:s") // Just for testing

	    			)
	    		);
			//$createAccount = $LS->register($firstname,$lastname,$user,$sex,$country,$email,$pass,$birthdate,$created);
	    		if($createAccount2 === "exists"){
	     			echo "User Exists.";
	    		}elseif($createAccount2 === true){
	     			echo "Success. Created account.";
	    		}
	   	}
	   	?>

And the function from the class: 

	/* A function to register a user with passing the username, password and optionally any other additional fields. */
	public function register( $id, $password, $other = array() ){
		if( $this->userExists($id) && (isset($other['email']) && $this->userExists($other['email'])) ){
			return "exists";
		}else{
			$randomSalt	= $this->rand_string(20);
			$saltedPass	= hash('sha256', "{$password}{$this->passwordSalt}{$randomSalt}");
			
			if( count($other) == 0 ){
				/* If there is no other fields mentioned, make the default query */
				//old query: ("INSERT INTO `{$this->dbtable}` (`username`, `password`, `password_salt`) VALUES(:username, :password, :passwordSalt)");
				//new query: ("INSERT INTO `{$this->dbtable}` (`username`, 'email' , `password`, `password_salt` , 'name' , 'lastname' , 'gender' , 'country' , 'DOB') VALUES(:username, :email, :pass, :passwordSalt, :firstname, :lastname, :gender, :country, :DOB)");
				$sql = $this->dbh->prepare("INSERT INTO `{$this->dbtable}` (`username`, `password`, `password_salt`) VALUES(:username, :password, :passwordSalt)");
			}else{
				/* if there are other fields to add value to, make the query and bind values according to it */
				//old query: ("INSERT INTO `{$this->dbtable}` (`username`, `password`, `password_salt`, $columns) VALUES(:username, :password, :passwordSalt, :$colVals)");
				//new query: ("INSERT INTO `{$this->dbtable}` (`username`, 'email' , `password`, `password_salt` , 'name' , 'lastname' , 'gender' , 'country' , 'DOB') VALUES(:username, :email, :pass, :passwordSalt, :firstname, :lastname, :gender, :country, :DOB)");
				$keys	 = array_keys($other);
				$columns = implode(",", $keys);
				$colVals = implode(",:", $keys);
			//l= $this->dbh->prepare("INSERT INTO `{$this->dbtable}` (`username`, `password`, `password_salt`, $columns) VALUES(:username, :password, :passwordSalt, :$colVals)");
				//INSERT INTO MyGuests (firstname, lastname, email)cLUES ('John', 'Doe', 'john@example.com')
				$sql = $this->dbh->prepare("INSERT INTO `{$this->dbtable}` (username,email,password,password_salt,name,lastname,created,gender,country,DOB) VALUES ('$username2','$email2','$pass2','$saltedPass','$firstname2','$lastname2','$created2','$gender2','$country2','$birthdate2')");
				print($sql);
				foreach($other as $key => $value){
					$value = htmlspecialchars($value);
					$sql->bindValue(":$key", $value);
				}
			}
			/* Bind the default values */
			$sql->bindValue(":username", $id);
			$sql->bindValue(":password", $saltedPass);
			$sql->bindValue(":passwordSalt", $randomSalt);
			$sql->execute();
			return true;
		}
	}
	

Thanks for your help. I am doing this because for a hobby I am trying to create a browser based game in which I use this login system to login the user to a main page then code all of the other pages myself. I have posted on stackoverflow and someone on their suggested that I should use a framework. If this is the case, can someone point me in the right direction?   Thanks again, if you need any info ask.

Hello everyone,
I made this website using CakePHP, and it was working great, but then suddenly it started giving me this error

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 38 bytes) in /cake/libs/model/datasources/dbo/dbo_mysql.php on line 766

Here is the code that contains line number 766

Code: [Select]
/**
 * Fetches the next row from the current result set
 *
 * @return unknown
 */
function fetchResult() {
if ($row = mysql_fetch_row($this->results)) {
$resultRow = array();
$i = 0;
foreach ($row as $index => $field) {
list($table, $column) = $this->map[$index];
$resultRow[$table][$column] = $row[$index];
$i++;
}
return $resultRow;
} else {
return false;
}
}

/**