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PHP - Php Causing High Load On Server
Hi, i'm new here and have a straightforward question.
On a server I use I have this script and we use it to force the download of mp3 files on a single click of a link. (Avoid opening in an internet audio buffering plug in or application) Code: [Select] <?php $filename = $_GET['file']; // required for IE, otherwise Content-disposition is ignored if(ini_get('zlib.output_compression')) ini_set('zlib.output_compression', 'Off'); // addition by Jorg Weske $file_extension = strtolower(substr(strrchr($filename,"."),1)); if( $filename == "" ) { echo "<html><title>Download Script</title><body>ERROR: download file NOT SPECIFIED. USE force-download.php?file=filepath</body></html>"; exit; } elseif ( ! file_exists( $filename ) ) { echo "<html><title>Download Script</title><body>ERROR: File not found. USE force-download.php?file=filepath</body></html>"; exit; }; switch( $file_extension ) { case "pdf": $ctype="application/pdf"; break; case "exe": $ctype="application/octet-stream"; break; case "zip": $ctype="application/zip"; break; case "doc": $ctype="application/msword"; break; case "xls": $ctype="application/vnd.ms-excel"; break; case "ppt": $ctype="application/vnd.ms-powerpoint"; break; case "gif": $ctype="image/gif"; break; case "png": $ctype="image/png"; break; case "mp3": $ctype="audio/mpeg3"; break; case "jpeg": case "jpg": $ctype="image/jpg"; break; default: $ctype="application/force-download"; } header("Pragma: public"); // required header("Expires: 0"); header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); header("Cache-Control: private",false); // required for certain browsers header("Content-Type: $ctype"); // change, added quotes to allow spaces in filenames, by Rajkumar Singh header("Content-Disposition: attachment; filename=\"".basename($filename)."\";" ); header("Content-Transfer-Encoding: binary"); header("Content-Length: ".filesize($filename)); readfile("$filename"); exit(); ?> I recently got an email from my service provider quoting the following Quote Hello, I apologize, but I was forced to suspend the script /home/mezerik/********/forcedownload.php as it was causing a high load on the server, and due to it affecting all of the other accounts on the system, I forced to take immediate action for the health of the server. Unfortunately I do not have any specific recommendations for this script, however, in general, adding some sort of caching mechanism, where the script does not need to generate a new page with every request, helps to lower the over load that a script will cause. Likely the original author or support group of the software that you are using will be able to help you to understand how to add something of this nature. If you reply back to this with your IP address (http://www.******.com/ip.shtml) we will be more than happy to go ahead enable HTTP access for you, so that you can safely work on the script without it causing further issues. Please let us know how you would like to proceed. I am not sure what is wrong with the script and if it is insecure to the server and should be edited or removed. Similar TutorialsI successfully load a page by simple_html_dom.php (developed in simplehtmldom.sourceforge.net) as $html = file_get_html('externalpage'); But sometimes this make a high load on CPU and the page does not load for a long time (probably due to the external site server). How can I skip the process when it is not normal to avoid high CPU usage? I found a script online that I am trying to get working. It was giving a 500 error from the get go and I've pinpointed it to the $data = fread() line. Does anyone know why? <?php $file = "../../media/v_360.m4v"; $filesize = filesize($file); $offset = 0; $length = $filesize; if (isset($_SERVER['HTTP_RANGE'])) { // if the HTTP_RANGE header is set we're dealing with partial content $partialContent = true; // find the requested range // this might be too simplistic, apparently the client can request // multiple ranges, which can become pretty complex, so ignore it for now preg_match('/bytes=(\d+)-(\d+)?/', $_SERVER['HTTP_RANGE'], $matches); $offset = intval($matches[1]); $length = intval($matches[2]) - $offset; } else { $partialContent = false; } $file = fopen($file, 'r'); // seek to the requested offset, this is 0 if it's not a partial content request fseek($file, $offset); $data = fread($file, $length); /* fclose($file); if ($partialContent) { // output the right headers for partial content header('HTTP/1.1 206 Partial Content'); header('Content-Range: bytes ' . $offset . '-' . ($offset + $length) . '/' . $filesize); } // output the regular HTTP headers header('Content-Type: ' . $ctype); header('Content-Length: ' . $filesize); header('Content-Disposition: attachment; filename="' . $fileName . '"'); header('Accept-Ranges: bytes'); // don't forget to send the data too print($data); */ ?> Its trying to read a 60mb file. Do you think it is timing out and that is causing the error? Have a strange problem on a new server that we've migrated to. I use class.phpmailer extensively with no problems but since moving to the new one, i notice that emails sent to ids on the same domain as the sender just dont go thru . i cannot figure out why this could be happening. What could i do to resolve this problem please? Thanks: Swati. OLD SERVER : PHP 2.6.4 , MYSQL - 4.1.12 NEW SERVER PHP 3.2.4 , MYSQL 5.1.50 My code snippet <? if($_POST['submit']){ $dec = $_POST["dec"]; require("class.phpmailer.php"); $mail = new PHPMailer(); $mail->IsMail(); $mail->From = "form@exam.com"; $mail->FromName = "exam"; if ($dec == "on"){ $mail->AddAddress("dec@exam.com"); // doesnt go thru $mail->AddAddress("dec@anyother.com"); // goes thru // add it } } ?> Hi, For about a month, I have been trying to figure out why my code will not return anything after posting a wwwForm (I have also tried the newer equivalent of this function but I had no luck with that either.) The nameField and passwordField are taken from text boxes within the game and the code used in my login script is copied and pasted from a Register script but I have changed the file location to the login.php file. The register script works fine and I can add new users to my database but the login script only outputs "Form Sent." and not the "present" that should return when the form is returned and it never gets any further than that point meaning that it lets the user through with no consequence if they use an invalid name because the script never returns an answer. What should I do to fix this? Thanks, Unity Code:
using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;
public class Login : MonoBehaviour
{
public InputField nameField;
public InputField passwordField;
public Button acceptSubmissionButton;
public void CallLogInCoroutine()
{
StartCoroutine(LogIn());
}
IEnumerator LogIn()
{
WWWForm form = new WWWForm();
form.AddField("username", nameField.text);
form.AddField("password", passwordField.text);
WWW www = new WWW("http://localhost/sqlconnect/login.php", form);
Debug.Log("Form Sent.");
yield return www;
Debug.Log("Present"); if (www.text[0] == '0')
{
Debug.Log("Present2");
DatabaseManager.username = nameField.text;
DatabaseManager.score = int.Parse(www.text.Split('\t')[1]);
Debug.Log("Log In Success.");
}
else
{
Debug.Log("User Login Failed. Error #" + www.text);
}
}
public void Validation()
{
acceptSubmissionButton.interactable = nameField.text.Length >= 7 && passwordField.text.Length >= 8;
}
}
login.php:
<?php
echo "Test String2";
$con = mysqli_connect('localhost', 'root', 'root', 'computer science coursework');
// check for successful connection.
if (mysqli_connect_errno())
{
echo "1: Connection failed"; // Error code #1 - connection failed.
exit();
}
$username = mysqli_escape_string($con, $_POST["username"]);
$usernameClean = filter_var($username, FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH);
$password = $_POST["password"];
if($username != $usernameClean)
{
echo "7: Illegal Username, Potential SQL Injection Query. Access Denied.";
exit();
}
// check for if the name already exists.
$namecheckquery = "SELECT username, salt, hash, score FROM players WHERE username='" . $usernameClean . "';";
$namecheck = mysqli_query($con, $namecheckquery) or die("2: Name check query failed"); // Error code # 2 - name check query failed.
if (mysqli_num_rows($namecheck) != 1)
{
echo "5: No User With Your Log In Details Were Found Or More Than One User With Your Log In Details Were Found"; // Error code #5 - other than 1 user found with login details
exit();
}
// get login info from query
$existinginfo = mysqli_fetch_assoc($namecheck);
$salt = $existinginfo["salt"];
$hash = $existinginfo["hash"];
$loginhash = crypt($password, $salt);
if ($hash != $loginhash)
{
echo "6: Incorrect Password"; // error code #6 - password does not hash to match table
exit;
}
echo "Test String2";
echo"0\t" . $existinginfo["score"];
?>
So I have a big table of about 30-40 columns. Some variables are quite long strings while others are simple tinyint(1) values.
Input into the code is a value or range of values or something that applies to each of the columns.
I need to find which ones are an applicable match to the user request and then load them into php.
Now I know variations can cause something to run more optimally one way or another but this system will get bogged down with lots of requests and lots of data, so any additional performance I give it now will help me down the road. I am just looking for general concepts to help, not specific code tweaking.
I have heard the typical rule is to query mysql as little as possible and do the hard lifting in php but I am not positive this is right.
Since I have to query anyways, should I do a mysql pull using a complex 'WHERE' to do most of the sorting. ie only get rows where a=1, b>5, c="http://google.com", d="3242342323kj4238237489023ejfjf3jrjf8jeifjdjf" ie long string, etc for all 30+columns?
OR I pull the whole DB and do all the sorting in php...
OR I do all the simple sorting in the MySQL query and some of the more complicated sorting in PHP (or vice versa)
Any ideas would help.
I try to get a high score system to work. The problem is to write data to the txt file: The file adder.php contains: <?php if(array_key_exists('name',$_GET)==true and array_key_exists('score',$_GET)==true) { $name=$_GET['name']; $score=$_GET['score']; $file=fopen('highscore.txt','a'); fwrite($file,$name.';'.$score.';'); fclose($file); } header("Location: index.php"); // Replace index.php with the name (and, if not in the same folder, path) // of the page that will display the scores (see below) ?> I use this website: http://members.multimania.nl, so it looks like http://members.multimania.nl/mine/adder.php?name=winner&score=99 What am I doing wrong? I have just did this php code for the high-low game but the $tries variable always goes down to 0 when I refresh..Can someone help me to return the $tries to browser with the url? Thank you
<html>
<?php function High_Low($guess){
Hello, I have what I hope to be a very simple question.. I have built a game in flash and for my high score table I simply want to request the high scores in reverse.. i.e the lowest score first.. here is my php.. please help, thanks in advance !! :- <?php include("sqldialog.php"); $table = $_POST['tab']; $recept = SelectDatas($table, "name, score, dategame", "id > 0", "score desc"); if ($recept) { $i = 0; foreach ($recept as $rec) { $i++; if ($i==1) { $result .= "pseudo$i=".$rec['name']."&score$i=".$rec['score']."&dategame$i=".$rec['dategame']; } else { $result .= "&pseudo$i=".$rec['name']."&score$i=".$rec['score']."&dategame$i=".$rec['dategame']; } } echo $result; } else { echo "BAD, $pseudo, $score, $dategame,$ipclient"; } ?> ok so i want to order by high to low on the field price but i don't know how to do this. i can order low to high by using ORDER BY `Price` ASC but how can i order high to low? I think I've coded myself into a corner. I have numerous items entered with measurement extremes - highest and lowest. Now I want somebody to be able to search for an item that could match a specific length. So I could have several items that are entered into a database like this: Code: [Select] item_id | length | high_low_param -----------+-----------+---------------------- 1234 | 12 cm | high -----------+-----------+--------------------- 1234 | 6 cm | low If somebody searches for an item that is 8 cm long, I want the results to be item 1234 and any other items that span that range. I'm not sure how to do this? array_fill ? I don't know. I don't want to slow down the database too much, and I don't want to have to put an entry for every single length each item could be. Any suggestions? I'm having a problem and need an answer to why its happening and how to prevent it. Scenario: I begin load my home page which starts with a session_start(); .... Before it FULLY completes loading I try to navigate to another page and BOOM, that page will not load and any other page that begins with session_start(); will not load unless I close and restart the entire browser or wait about 10 minutes.... I will note my website makes ajax calls every 5 seconds or so, but I use setTimeout for them. Any help??? Thanks ahead! I have a class that I created, halfway down my page I call a function from the class which prints some code and also changes a variable inside the class. It's a search class basically it prints out the search results and saves the total amount of results into the variable. I want to display the amount of results above the results like so:- echo $Search->results; $Search->GetResults('foo'); The problem is that $Search->results will be equal to NULL until the variable is updated in the function GetResults. Hope that makes sense, am I going about this wrong? Hi all I have some code that displays the high scores for a game. Unfortunately, if a user has more than 1 high score in the table all scores for that user are displayed. I would like to only display the highest score per user. My Current Code Code: [Select] $sql_query = sprintf("SELECT * FROM `highscores` WHERE `gameID` = '106' ORDER BY `score` DESC"); //store the SQL query in the result variable $result = mysql_query($sql_query); if(mysql_num_rows($result)) { //output as long as there are still available fields while($row = mysql_fetch_row($result)) { echo ("$row[3] Scored :$row[5] <br>"); } } //if no fields exist else { echo "no values in the database"; } mysql_close($con); OutPut User1 300 User1 298 User 2 297 User1 296 User3 295 User2 290 I would like the output to be User1 300 User 2 297 User3 295 Any help is much appreciated Hello, I am including file SimpleImage.php in my php file. The script will handle everything perfectly, but if I try and upload a very large resolution image 2560x1440 the script just dies and no resizing is made. The file size of the high resolution image is well below 2 Mb, so there is no file size issue. I am troubled. Any ideas? Thanks. SimpleImage.php Code: [Select] <?php /* * File: SimpleImage.php * Author: Simon Jarvis * Copyright: 2006 Simon Jarvis * Date: 08/11/06 * Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details: * http://www.gnu.org/licenses/gpl.html * */ class SimpleImage { var $image; var $image_type; function load($filename) { $image_info = getimagesize($filename); $this->image_type = $image_info[2]; if( $this->image_type == IMAGETYPE_JPEG ) { $this->image = imagecreatefromjpeg($filename); } elseif( $this->image_type == IMAGETYPE_GIF ) { $this->image = imagecreatefromgif($filename); } elseif( $this->image_type == IMAGETYPE_PNG ) { $this->image = imagecreatefrompng($filename); } } function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) { if( $image_type == IMAGETYPE_JPEG ) { imagejpeg($this->image,$filename,$compression); } elseif( $image_type == IMAGETYPE_GIF ) { imagegif($this->image,$filename); } elseif( $image_type == IMAGETYPE_PNG ) { imagepng($this->image,$filename); } if( $permissions != null) { chmod($filename,$permissions); } } function output($image_type=IMAGETYPE_JPEG) { if( $image_type == IMAGETYPE_JPEG ) { imagejpeg($this->image); } elseif( $image_type == IMAGETYPE_GIF ) { imagegif($this->image); } elseif( $image_type == IMAGETYPE_PNG ) { imagepng($this->image); } } function getWidth() { return imagesx($this->image); } function getHeight() { return imagesy($this->image); } function resizeToHeight($height) { $ratio = $height / $this->getHeight(); $width = $this->getWidth() * $ratio; $this->resize($width,$height); } function resizeToWidth($width) { $ratio = $width / $this->getWidth(); $height = $this->getheight() * $ratio; $this->resize($width,$height); } function scale($scale) { $width = $this->getWidth() * $scale/100; $height = $this->getheight() * $scale/100; $this->resize($width,$height); } function resize($width,$height) { $new_image = imagecreatetruecolor($width, $height); imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight()); $this->image = $new_image; } } ?> My code for the resizing where the script dies. It works well for photos but with higher resolution (2560x1440) it fails??: Code: [Select] include('incl/SimpleImage.php'); $image = new SimpleImage(); $image->load('images/avatars/'.$name); //This makes a 400 wide avatar $image->resizeToWidth(400); $image->save('images/avatars/'.strtolower($username.'_400.'.$ext)); //This makes a 30x30 mini avatar $image->resize(30,30); $image->save('images/avatars/'.strtolower($username.'_small.'.$ext)); I have a PHP web system that store in a windows server. In the system, there is a function for user to upload files to another server (Shared server in Unix). When i try to upload a file, it gives warning: Warning: move_uploaded_file(\\unixserver/sharedfolder/upload/test.txt) [function.move-uploaded-file]: failed to open stream: Permission denied in C:\wamp\www\upload\index.php on line 40 For your information, my username has been assigned in xxx's group that has access to read and write on that folder. Besides, i'm able to open,create and delete files on that folder's server manually (samba). The safe mode setting is off. Does anybody has any idea why this thing happen? I'm trying to make a simple website where people register to my website. When the user doesn't fill anything inside the boxes they get a message "Please fill all required fields" on the register.php page On my local host require_once works good. It shows up.
But when i upload the files to my sever the require_once does not show up on the register.php It just refreshes and i dont get the message "Please fill all required fields"
This is the code that works in local host but not in a live server <?php require_once 'messages.php'; ?>
Here is my full code
Register page: <html> <?php require_once 'messages.php'; ?> <br><br> <form action="register-clicked.php" method="POST"> Username:<br> <input type="text" name="usernamebox" placeholder="Enter Username Here"> <br><br> Email:<br> <input type="text" name="emailbox" placeholder="Enter email here"> <br><br> Password:<br> <input type="password" name="passwordbox" placeholder="Enter password here"> <br><br> Confirm Password:<br> <input type="password" name="passwordconfirmbox" placeholder="Re-enter password here"> <br><br> <input type="submit" name="submitbox" value="Press to submit"> <br><br> </form> </html>
Register clicked <?php
session_start();
$data = $_POST;
if( empty($data['usernamebox']) ||
empty($data['emailbox']) ||
empty($data['passwordbox']) ||
empty($data['passwordconfirmbox'])) {
$_SESSION['messages'][] = 'Please fill all required fields';
header('Location: register.php');
exit;
}
if ($data['passwordbox'] !== $data['passwordconfirmbox']) {
$_SESSION['messages'][] = 'Passwords do not match';
header('Location: register.php');
exit;
}
$dsn = 'mysql:dbname=mydatabase;host=localhost';
$dbUser='myuser';
$dbPassword= 'password';
try{
$connection = new PDO($dsn, $dbUser, $dbPassword);
} catch (PDOException $exception){
$_SESSION['messages'][] = 'Connection failed: ' . $exception->getMessage();
header('Location: register.php');
exit;
}
messages.php <?php
session_start();
if (empty($_SESSION['messages'])){
return;
}
$messages = $_SESSION['messages'];
unset($_SESSION['messages']);
?>
<ul>
<?php foreach ($messages as $message): ?>
<li><?php echo $message; ?></li>
<?php endforeach; ?>
</ul>
Edited Wednesday at 12:49 AM by bee65 Hi, I am not a PHP programmer. I took on a new client with a simple PHP site, without any databases. The site is up and running on the web. I would like to get it running on my local machine for further development. I have latest version of WAMP installed, running Apache version 2.2.11 and PHP version 5.3.0 I created a directory in the WAMP "www" project directory and it shows up there like it's supposed to when I browse to "localhost" Problem: The home page of website displays text but no, images, styles, footer, header, nav links, etc. Here is the code for the home page: <? define("NAV","home"); require_once('local/local.php'); ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>TITLE</title> <meta name="keywords" content=""> <meta name="Description" content=""> <? include("common/dochead.php"); ?> </head> <body onLoad="<? include('common/preloads.php'); ?>"> <!-- ============================ main ============================= --> <div id="main-frame"><div id="main" class="noCollapse"> <? include("common/sign.php"); ?> <div id="right-frame"> <? include("common/navigation.php"); ?> <div id="content-frame"> <div id="content"> <h1>Welcome</h1> <p>This is the content area. This is the content area. This is the content area. </p> </div><!-- end content --> </div><!-- end content-frame --> </div><!-- end right-frame --> <div class="clearFloats"></div> </div><!-- end main --></div><!-- end main-frame --> <? include("common/footer.php"); ?> </body> </html> Any help would be greatly appreciated. I have spent many hours on this. Regards I'm having a mini application developed to create A4 PDF's using PHP A key part of the project needs to be able to insert high quality graphics into the document that when printed out look really sharp Some of the graphics are variable and don't always have to be printed I just wanted to know if there was a general guide on what graphics and quality to use? The graphics I need printed print really well when put into a Word document at 300 resolution - so I can't see why there should be any problems inserting into a PDF - these graphics are PNG ones Unfortunately, if I insert the same PNG format into the PDF via the PHP code, the graphic turns out to be REALLY big Just looking for advice Thanks OM Hi folks, I'm curious if I can for example, save a file from my server and it will save to all other servers - obviously if they accepted the connection first. It's for a software I developed and is almost complete and know there will be frequent updates to it. Instead of users downloading upates, I want the update files from my server to somehow synchronize to their server automatically? Anything called this?? Thanks for info. This isn't exactly an application design question, but rather a system design one.
I am about to install an Inventory Control System inside this store I work in.
The store itself also owns a Linode VPS running Centos 6.4 which hosts our website.
This new Inventory System will come built in with a Microsoft SQL Server, and supposedly it is a SQL Anywhere database, but I'm not too sure what that means.
I need to make this database publicly accessible, but only via the Linode VPS. Surely, setting restrictions is easy enough to address that issue. That isn't my question.
My first idea is to put this server into the DMZ, easy. But it doesn't exactly sound safe. So my next idea was to put a middleman server in the DMZ, this way the Linode can send queries to that middleman server and it will send that data to the SQL Server and back. This is very vaguely described I know, but I don't want to get too much into details, but rather, understand how I can create that middleman server, and what could Install onto it that would allow me to securely process queries?
My first thought was to install a webservice, that accepts an XML/JSON request and returns an XML/JSON response.
Then, I realized directly afterwards that I don't have any experience setting up a webservice like that.
What kind of options are there out there? Ultimately, my question is, should I just put the Server in the DMZ or should I create the middleman, and if so, can someone point me in the right direction as to getting a webservice set up? Edited by Zane, 15 July 2014 - 11:28 PM. |
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