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PHP - Mysql_escape_string And Mysql_real_escape_string Not Working
Hello all, I'm attempting to secure a script to prevent against SQL Injections. But for some reason the code I'm using is not correctly escaping malicious characters.
Here's a section of the code I'm using (the beginning) that first pulls the data from the database: Code: [Select] include 'include/dbconnect.php'; include 'include/funcs.php'; if (isset($_GET['gid'])) { $galleryid = cleanvar($_GET['gid']); $sql = "select * from galleries where id = $galleryid"; $result = mysql_query($sql) or die(mysql_error()); if ($row = mysql_fetch_assoc($result)) { $galleryid = $row['id']; $gallerytitle = $row['title']; the cleanvar function is located in funcs.php, and this is what it looks like: Code: [Select] function cleanvar ($var) { return stripslashes(mysql_real_escape_string($var)); } magic_quotes_gpc is on, so that is why I added stripslashes, but for some reason whenever I go to the script and attempt to inject into it with a single or double quote, I still get a syntax error, enabling me to successfully inject. Any ideas? Thanks in advance! Similar Tutorialsthe mysql_real_escape_string does not add slashes when it enter my db y Code: [Select] if(isset($_POST['submitbtn'])){ //will open up the db connection require_once"../includes/connect.php"; $errors = ""; $welcometitle = mysql_real_escape_string($_POST['welcometitle']); $welcomesection = mysql_real_escape_string($_POST['welcomesection']); $infotitle = mysql_real_escape_string($_POST['infotitle']); $infosection = mysql_real_escape_string($_POST['infosection']); $videotitle = mysql_real_escape_string($_POST['videotitle']); $videosection = mysql_real_escape_string($_POST['videosection']); if(isset($welcometitle, $welcomesection) && !empty($welcometitle) && !empty($welcomesection)){ if(isset($infotitle, $infosection) && !empty($infotitle) && !empty($infosection)){ if(isset($videotitle, $videosection) && !empty($videotitle) && !empty($videosection)){ //adding them to the db //adding them to the db $query = mysql_query("UPDATE `home` SET `welcometitle`= '$welcometitle', `welcomesection`= '$welcomesection', `infotitle`='$infotitle', `infosection`= '$infosection',`videotitle`= '$videotitle',`videosection`= '$videosection'") or die(mysql_error()); header("location: http://www.website.org/control/edithome"); }else{ $errors = "Please fill in the Video Section"; } }else{ $errors = "Please fill in the Info Section"; } }else{ $errors = "Please fill in the Welcome Section"; } mysql_close();//will close the inlcude db connection } ?> I am working on a project at the end of a text book called Beginning PHP MySQL Development which is published by Pawprints Learning Technologies. I am developing the files in NetBeans and using WAMP server. I get this error from the process_insert.php file "Deprecated: MySQL_real_escape_string():..."
I can't copy and paste so I attached my files. Can anyone help?
Attached Files
Add Product_php.htm 1.94KB
1 downloads
index.php 1.24KB
0 downloads
add_product.php 1.33KB
0 downloads
process_insert.php 1.19KB
0 downloads
db.connect.php 185bytes
0 downloads Hi, just wondering do i need to use mysql_real_escape_string() on login information (username and password). I use it as shown below but get an error when connecting. Code: [Select] if(isset($_POST['submit'])){ if( empty($_POST['uname']) && (empty($_POST['upass']))){ header( "Location:Messages.php?msg=1" ); exit(); } $n=mysql_real_escape_string($_POST['uname']); $p=mysql_real_escape_string($_POST['upass']); include('config.php'); $query="select * from country where uname='$n' and pw='$p'"; $result=mysql_query($query); Is it correct to use mysql_real_escape_string() function on every query that i wonna insert or search ? I have fields like TEXT(dectription of article), VARCHAR(name of article) and more like that, and is there correct to use mysql_real_escape_string for all fields when query is INSERT ? Hello and thanks in advance for the input. I a fully functioning form. I am validating the input and successfully inserting the input into the mysql database. Now I am trying to escape the data by adding the basic line of code: $name = mysql_real_escape_string($_POST['name']); The input is successful but the mysql_database for name field is empty. If I remove the above line of code and just input the value for $name (without escape) the update works great. So the question is obvious for the above. Why? I have a form that allows users to submit to a database and for security reasons I am using mysql_real_scape_string on all of their input values. However this means that if the user puts something in speech marks such as "hello" It will then show up in the database as \"hello\" This means that whenever I fetch anything from the database it will have slashes in which doesn't look good. How do other people get round this problem. When I fetch something from my database should I do a string replace and just delete these slashes or is there a better method? Thanks for any help. Code: [Select] $update = "UPDATE model SET name = '$name', age = '$age', height = '" . mysql_real_escape_string($height) . "', hair = '$hair', bust = '$bust', waist = '$waist', hips = '$hips' ......... WHERE id = '$id' "; $rsUpdate = mysql_query($update); After reading the manual at php.net on this function, I should be inserting the mysql_real_escape_string for each variable, correct? Right now I just have it for $height. The reason I'm asking is because I have 28 columns in this table and want to make sure I'm using this function properly as it seems like a tedious process and messy code. Good morning,
I am trying to implement a simple sanitization of data before inserting in my database and am having a little trouble due to the fact that I am using a third party script that is accessing posted variables in a way that is unfamiliar to me... here's the data. The problem area is red. The form simply hangs up when submitted. I have used this method in the past, but not with an object operator.
// insert into database This code gives an error. Please help fix. $mydb = mysql_connect("localhost","my_un","my_pw"); mysql_select_db("my_db"); $query =sprintf("SELECT * FROM idb1 WHERE username = '%s' AND authority = 'Banned'", mysql_real_escape_string($userNm)); if(mysql_num_rows($query)) { $login = "&err=Not allowed."; echo($login); } else { $result=sprintf("SELECT * FROM idb1 WHERE username = '%s' AND password ='%s'", mysql_real_escape_string($userNm), mysql_real_escape_string($passWd)); if(mysql_num_rows ($result) == 0) { $login = "&err=Retry!!"; echo($login); } else { $row = mysql_fetch_array($result); $userNm=$row['username']; $passWd=$row['password']; $login = "$userNm=" . $userNm . "$passWd=" . $passWd . "&err=Successful."; echo($login); } } I just red few tutorials about mysql_real_escape_string. Could someone check if this is correct? <?php $conn = mysql_connect("localhost","myusername","thepassword1"); mysql_select_db("mydataB", $db); $result = mysql_query("SELECT * FROM applicant WHERE username = '$username'"); if (mysql_num_rows ($result) > 0){ $register = "&err=Not Available."; echo($register); } else { $username = mysql_real_escape_string($_POST['username'], $db); $password = mysql_real_escape_string($_POST['password'], $db); $name = mysql_real_escape_string($_POST['name'], $db); $email = mysql_real_escape_string($_POST['email'], $db); $id = mysql_real_escape_string($_POST['id'], $db); mysql_query("INSERT INTO applicant (username, password, name, email, id) VALUES ('$username', '$password', '$name', '$email', '$id')"); $register = "Successful."; echo($register); } ?> Hello All, Wondering if someone can help. I have a piece of code which I use on all data I post to my database which uses mysql_real_escape_string on all my forms for security purposes that I found on t'internet: if(!get_magic_quotes_gpc()){ $_GET = array_map('mysql_real_escape_string', $_GET); $_POST = array_map('mysql_real_escape_string', $_POST); $_REQUEST = array_map('mysql_real_escape_string', $_REQUEST); $_COOKIE = array_map('mysql_real_escape_string', $_COOKIE); } However, ever since i've installed this i'm having problems with other elements, such as deleting records from a MYSQL database like so: <?php $msg = ""; if(isset($_POST['Submit'])){ $total = $_POST['total']; $news_ids = $_POST['nws_id']; foreach($news_ids as $id){ mysql_query("DELETE FROM news WHERE news_id='$id'"); } $msg = count($news_ids) . " News Item(s) deleted!"; } $result = mysql_query("SELECT *, DATE_FORMAT(published, '%d-%m-%Y') as formatted_date from news order by news_id desc;"); $num = mysql_num_rows($result); $n = 0; ?> Yet if I delete the piece of code above code it works fine, but I don't understand why the above code effects this? Anyone plese help me understand? Thanks hey guys, just wondering, is it advisable to use mysql_real_escape_string() with <select> boxes, i know the web designer will always set the values for options within select boxes, therefore there shouldn't be any danger, but then i found such js code as: Code: [Select] javascript:document.body.contentEditable='true'; document.designMode='on'; void 0 (this allows the user of any site to edit content on the users end) so with something like the above, is it at all possible for a user to alter the option values within a select box and successfully submit the altered form? thanks Hi, I have an HTML Area on an admin section of my site. The HTML gets submitted to a MySQL database, but gets parsed using mysql_real_escape_string. The problem i have just noticed, is that upon every edit, it gets parsed again, and again. Here is the code: Code: [Select] $updatequery = "UPDATE zen_blog SET content = '" . mysql_real_escape_string($htmlcontent) . "', active=$activate WHERE id = $updateid"; $doupdate = $db->Execute($updatequery); Here is the result: Quote <h2 class=\\"\\\\\\"\\\\\\\\\\\\\\"page_title\\\\\\\\\\\\\\"\\\\\\"\\"> Is it possible to only use it where its needed? Thanks! Joe Hi, i had today problem with my script. Everything worked well on my localhost(xampp server) and when i uploaded on dedi machine functions with MySQL database stoped working. Problem was with mysql_real_escape_string and i forgot that i must first open connection and then mysql_real_escape_string... But strange thing is that on xampp server i dont need to open connection for mysql_real_escape_string, and everything worked well... is there any solutio to php scripts on xampp worke same as php script on linux apache server? Hi, I am trying to make a blog system in php and mysql and just about got it working except for one thing. I need to sanitise the fields, both to prevent against sql injection and to allow the bloggers to use punctuation such as quotes. this is the query code I have so far: if($_SERVER["REQUEST_METHOD"] == "POST") { $post_title = $_POST['posttitle']; $post_content = $_POST['postcontent']; $post_content = mysql_real_escape_string($post_content); $query=mysql_query("INSERT INTO 'blog'('Title','Content') VALUES ('$post_title','$post_content')",$connect); header("Location:index.php?page=afterpost&post=".mysql_insert_id()); } I can't see why that isn't working, but when I type something in with a quote in it it just doesn't submit to the database. Without a quote works fine. If I try echo $post_content;, it comes up with backslashes before the quotes so the mysql_real_escape_string seems to be working. What am I doing wrong? Thanks in advance. Hi all, I use mysql_real_escape_string on user inputs before using them in a MySQL query. However, some of my queries use arrays or imploded arrays, for example a query of the form: SELECT .. FROM .. WHERE .. IN .. It seems like in these cases I can't use mysql_real_escape_string, am I correct in thinking this? If so, what can I use instead to ensure the best possible security against SQL injections? Thanks! If i use mysql_real_escape_string() whilst inserting data...and that data contained 'common sql injection chars' - im guessing it would escape/backslash them? So say if I now wanted to select/extract that data from the DB, would the data contain the slashes or would the slashes be automatically removed/stripped? I have an AJAX script which queries a DB when a user inputs a search text. That's great, works well. However, when I use mysql_real_escape_string, it seems to completely rid the '$q'. When I don't use it, it works well but of course, there's the security side of things. Here's the code snippet: <?php error_reporting(E_ALL); $q = $_GET["q"];//added mysql_real_escape_string //$q = mysql_real_escape_string('$_GET["q"]'); $con = mysql_connect("localhost","aaaaa","aaaaa"); if (!$con) { die('Could not connect: ' . mysql_error()); } mysql_select_db("aaaaa", $con); $sql="SELECT * FROM articles WHERE keywords LIKE '%$q%'"; ?> It seems so simple, but its just not working. What could it be? I keep getting the following error: Warning: mysql_real_escape_string() [function.mysql-real-escape-string]: A link to the server could not be established With this code: <?php $level = $_POST[level]; $first = $_POST[first]; $second = $_POST[second]; $third = $_POST[third]; $fourth = $_POST[fourth]; $mysqli = new mysqli("*****", "*****", "******", "********"); if ($mysqli === false) { die("ERROR: Could not connect to database. " . mysqli_connect_error()); } $vidlink=mysql_real_escape_string($_POST[vidlink]); $title=mysql_real_escape_string($_POST[title]); $des=mysql_real_escape_string($_POST[des]); $website=mysql_real_escape_string($_POST[website]); $cat= mysql_real_escape_string($first . $second . $third . $fourth); why won't it work? |
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