How do i protect against SQL Injection if i wrote the site in PHP procedural? Can i use prepared statements? Or exists other ways?   example:   $query ="INSERT INTO users (name,username,password,email,gender) VALUES ('$name','$username','$password','$email','$gender')";  $result = mysqli_query($connect,$query) or die ( "Error : ". mysqli_error($connect) );
If user input is inserted without modification into an SQL query, then the application becomes vulnerable to , like in the following example:  $unsafe_variable = $_POST['user_input'];   mysql_query("INSERT INTO `table` (`column`) VALUES ('$unsafe_variable')");   That's because the user can input something like value'); DROP TABLE table;--, and the query becomes:  INSERT INTO `table` (`column`) VALUES('value'); DROP TABLE table;--')   What can be done to prevent this from happening?
How do I get a slanted \sum symbol? I want to use a slanted \sum symbol denoting a different meaning from summation. How do I get a slanted \sum symbol? "a while" vs "awhile" Is there a difference between "awhile" and "a while"? If there is, what is it? I've been wondering this for awhile, but now I actually need the answer. On main and in the old mobile site (iirc) the username of the OP is highlighted in the comments.  This is no longer the case after the new design/theme was rolled out yesterday.  Can we get this back? What is "#!' in a script file? $cat shebang.sed  #! /bin/sed -f s/red/xxx/ s/BLUE/1234/  $./shebang.sed rgb lower (#1): "xxx green blue" UPPER (#2): "RED GREEN 1234"  $sed -f shebang.sed rgb lower (#1): "xxx green blue" UPPER (#2): "RED GREEN 1234"   I may guess what #! is doing. However, I don't say I know it. what is "#!"? Given that the majority of biologists do not currently consider viruses to be alive, a virus can never die.  It can, however, get destroyed by long exposures to soapy water, alcohol, and apparently certain frequencies of UV light.  Why is an individual SARS-CoV2 virion not infectious forever?  Or is it? Quick easy way to migrate SQLite3 to MySQL? Anyone know a quick easy way to migrate a SQLite3 database to MySQL? What is the 'Badlock Bug'? A user on the Ask Ubuntu General Room posted a link to . After some googling around, all I can find is that it is a mysterious security bug, that uses the same website template as Heartbleed.  I manage Linux Servers, a mysterious security bug does not sit well with me. What exactly is it, and how can I protect my servers from it? Low output volume Why constructors will always have same name as of class and how they are invoked implicitly? LEFT OUTER JOIN in LINQ Showing that ${\rm E}[X]=\sum_{k=0}^\infty P(X>k)$ for a discrete random variable Let $X$ be a discrete random variable whose range is $0,1,2,3,\ldots$. Prove that $$ {\rm E}[X]=\sum_{k=0}^\infty P(X&gt;k). $$  How to prove this? I tried a bit but unable to post due to formatting issue. Can anyone help? How to move apps from internal to external storage? How can I prevent installation of a specific package on Linux Mint? Word to describe the fear of unknown future Is it possible to run commands from spotlight? I run commands in terminal a lot and i'm wondering if it is possible to run the commands from spotlight. For example in spotlight  would like to run the command(because i have a lot of network issues):   ping google.com   And then spotlight to load terminal and execute the command instead of having to load terminal because it takes so long to load. So is this possible? event.preventDefault() vs. return false How can I get a shapefile from a postgis query? How do I set the default program? How do I set the default program that I use?  I have tried to open System Info → Default Program → change my program, but it won't work,  Any idea? Or should I use Terminal?   I want to replace the default movie player with VLC media player, because the current movie player is useless to me. Is there any way to actually impose disadvantage (not just cancel advantage) on saving throws against spells for a creature with Magic Resistance? Many creatures in D&amp;D 5e have a feature called Magic Resistance. One such is the :  Magic Resistance. The archmage has advantage on saving throws against spells and other magical effects.  So the Archmage has advantage on saving throws against magical effects. Suppose I wanted to weaken the Archmage's resistance to magic - I use some effect that gives disadvantage on the saving throw for my spell. Normally, this would balance out to a straight roll, as the  say:  If circumstances cause a roll to have both advantage and disadvantage, you are considered to have neither of them, and you roll one d20. This is true even if multiple circumstances impose disadvantage and only one grants advantage or vice versa. In such a situation, you have neither advantage nor disadvantage.  This seems to set a baseline for a straight roll on saves against magical effects, that the Archmage can never roll at disadvantage against magical effects. But is there a way to get around this? Keep in mind, such an ability must respect the  rule:  That said, many racial traits, class features, spells, magic items, monster abilities, and other game elements break the general rules in some way, creating an exception to how the rest of the game works. Remember this: If a specific rule contradicts a general rule, the specific rule wins.  The general rule here is that advantage and disadvantage balance out to a single die roll, so getting around Magic Resistance must either specifically override the rule for advantage and disadvantage, or eliminate Magic Resistance entirely. Is there any way (e.g. magic item, class feature, spell, etc.) to force a creature with Magic Resistance to make a save against a magical effect with disadvantage?  While writing this up I did find  which asks generally how to combat creatures with Magical Resistance, I intend this to be a (hopefully) more focused version of that question. Creating a .desktop file for a new application