The PHP code is given below:
<h3>PHP code</h3>
if(isset($_REQUEST['login_btn'])){
        $email = filter_var(strtolower($_REQUEST['email']),FILTER_SANITIZE_EMAIL); //strtolower changes email to all lower case
        $password = strip_tags($_REQUEST['password']);
The remaining code is in the file attached.
   
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Answer:A
Explanation:
The /var Directory. /var is a standard subdirectory of the root directory in Linux and other Unix-like operating systems that contains files to which the system writes data during the course of its operation
 
        
             
        
        
        
<span>Truth tables are diagrams used in mathematics and logic to help describe the truth of an entire expression based on the truth of its parts.
A truth table shows all the possible combinations (outputs) that can be produced from the given inputs. They are mainly used in Boolean algebra.</span>
        
             
        
        
        
Answer: Source 
Explanation: The malware is the software persisting malicious approach to cause the damage/loss.The primary trait of the malware are infection,concealment,etc.
The concealment refer to the malware such as the Trojan horse, and other viruses that has only purpose to cause the malfunctioning in the system.The virus that get into the other software and then damage the system in known as the infectious malware .
The circulation is the transferring of the virus in the circular manner between the system for the damaging.Thus,the only trait that is not the part of the malware is source. 
 
        
             
        
        
        
Answer:
1.45638
Explanation:
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