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Q:

What is the use of header() function in php?

Answer

The header() function sends a raw HTTP header to a client. We can use header() function for redirection of pages. It is important to notice that  header()  must be called before any actual output is seen..

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Subject: PHP

Q:

What is difference between MyISAM and InnoDB storage engines in mysql.

Answer

1 : InnoDB provides us row level locking while MyISAM provides us table level locking.

2 : InnoDB offers foreign key constraints wheres in MyISAM does not have foreign key constraints.

3 : InnoDB does not have full text search wheres MyISAM provides us full text search.

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Subject: PHP

Q:

What is a .htacces file

Answer

 .htaccess is a configuration file running on Apache server.These .htaccess file used to change the functionality and features of apache web  server .

 e.g   .htaccess file used for url rewrite .

         .htaccess file used to make the site password protected.

         .htaccess file can restrict  some ip addresses ,so that on restricted ip adresses  site will not open.

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Subject: PHP

Q:

Why we use array_flip

Answer

array_flip exchange the keys with their associated values in array ie. Keys becomes values and values becomes keys.

<?php
$arrayName    = array("course1"=>"php","course2"=>"html");
$new_array    = array_flip($arrayName);
print_r($new_array);
?>

OUTPUT :

Array
(
[php]     => course1
[html]    => course2
)

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Subject: PHP

Q:

How to open a file?

Answer

<?php
$file = fopen("file.txt","r");
?>

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Subject: PHP

Q:

Which function would you use to insert a record into a database?

Answer

The dba_insert() function adds a record to a database.

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Q:

What is Apache configuration file typically called?

Answer

The Apache configuration file is called httpd.conf.

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Subject: PHP

Q:

What is a PHP Filter?

Answer

A PHP filter is used to validate and filter data coming from insecure sources.
To test, validate and filter user input or custom data is an important part of any web application.
The PHP filter extension is designed to make data filtering easier and quicker.

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Subject: PHP