The fileatime() function in PHP is used to return the last access time of a file as a UNIX timestamp. On failure, the fileatime() returns false.

PHP echo is a language construct, not a function. Therefore, you don’t need to use parenthesis with it. The correct way to print “Hello World” in PHP is:

echo "Hello World";

The gettype() function is an inbuilt function in PHP, and as its name implies, it returns the type of a variable. The gettype() function in PHP is used to check the type of existing variable.

The PHP Chr() function is used to generate a single byte string from a number. In other words, we can say that it returns a character from a specified ASCII value.

In PHP, a variable is declared using a $ sign followed by the variable name. A PHP variable name cannot contain spaces.

Syntax of declaring a variable in PHP is given below:

$variable_name=value;

We can declare and call user-defined functions easily. The syntax to declare user-defined functions is given below –

function functionname(){  
//code to be executed  
}

The strlen() function is predefined function of PHP. It is used to find the length of string or returns the length of a string including all the whitespaces and special characters.

The scope of a variable is defined as its range in the program under which it can be accessed. PHP has three types of variable scopes:

• Local variable
• Global variable
• Static variable

In PHP, a variable is declared using a $ (Dollar) sign followed by the variable name.

As PHP is a loosely typed language, so we do not need to declare the data types of the variables. It automatically analyzes the values and makes conversions to its correct datatype. Variables in PHP are case-sensitive, as an instance, the variables $name and $NAME both are treated as different variables.

PHP stands for Hypertext Preprocessor. PHP is an open-source, interpreted, and object-oriented scripting language that can be executed on the server-side. It is well suited for web development.

The correct answer is Resources

Resources: are special variables that hold references to resources external to PHP (such as database connections).

The correct answer is the preg_match() function searches string for a pattern, returning true if a pattern exists, and false otherwise

The correct answer is The ereg() function searches a string specified by string for a string specified by the pattern, returning true if the pattern is found, and false otherwise.

To close the connection in MySQL database we use PHP function mysql_close() which disconnect from database.

The correct answer is a distributed query retrieves information from two or more nodes.