Q1 . What is PHP?

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SOLUTION

It stands for Pre hypertext processor and is one of the most widely used server side scripting languages.It is an open source and free to use.

Q2 . How do you initialize the code?

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SOLUTION

In a webpage all the content inside the <?php ?> is php code and is executed as per its semantics.

Q3 . How do you create variables in PHP?

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SOLUTION

We create variables just by $variable

All the variables are also used with $ for accessing the value

For example

$a=2;

Q4 . How do you create a connection in PHP?

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SOLUTION

The mysqli() function is used to create a function to the server.

Example of a connection

$conn = new mysqli($name_of_server, $user_name, $pass_code);

Q5 . How do you import another file in PHP?

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SOLUTION

We can import a file from a location by using include.

Example

<?php include 'dir1/file1.php' ?>

Q6 . How to read a file in PHP?

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SOLUTION

There are two ways to read a file

we can simply use the readfile() function to read the contents of the file

example readfile("testfile.php").

Second we can use the fopen() function and open the file in read mode

fopen("testfile.php","r")

Q7 . How to break a line in PHP?

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SOLUTION

We can use the <br> tag inside an echo

echo '<br>';

We can use".PHP_EOL".

We can also use the nl2br() funtion to break the strings into different lines.

Q8 . what are arrays and how to use them in PHP?

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SOLUTION

Arrays are a collection of data of the same data type.

We can intialise arrays like $subj = array("Maths", "science", "social science");

we can display the values using the $subj[0] to access the first element.

Q9 . What are associative arrays in PHP?

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SOLUTION

These are arrays that store the keys and values corresponding to it.

$subj = array("maths"=>"100", "science"=>"99");

We can get the marks obtained in maths by

subj['maths']

Q10 . What is the use of Filters in PHP?

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SOLUTION

The use of filters is to restrict and clean the data if it has unwaranted characters.

Restrict part is to avoid the data from entering

The cleaning part is if entered then clean it up to avoid damage

One example of a filter and sanitize function is filter_var($input, FILTER_SANITIZE_STRING)

This will remove all the HTML elements from the string.

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