Top 10 PHP interview Questions

PHP Interview Top Questions

Q No. 1: Difference between $var and $$var ??

Ans: $var is php variable but $$var is reference variable. For example if $var= “John” and $$var = “Kate” then $John value is Kate.

QNo 2: Difference between $_GET and $_POST??

Ans: In $_GET method the requested data is shown in the URL but in $_POST the data is hidden in the URL. In $_GET there are limitations on the sending data but in $_POST there are no limit.
Difference between $_GET and $_POSTmethod

QNo 3: Difference between include and require??

Ans: Both are used to include the file but when file is not found then include sends warning whereas require sends fatal error

QNo 4: Why htaccess is used for??

 Ans: htaccess files are Apache server configuration files and these are used to make changes on a per directory basis. These are placed in a particular directory and directive applies to that directory.

QNo 5: Can you compare an integer 12 and string “13” in php??

Ans: Off course, you can compare because these two are numbers. Just their types are different.

QNo 6: Find the numbers of parameters in the fun??

Ans: fun_num_arg () function gives the number of parameters passed in the fun.

QNo 7: Difference between character 24 and x24??

Ans: character 24 is octal and x24 is the hex 24 in PHP

QNo 8: What is MVC??

Ans: MVC is Model , View and Controller and it is used to arrange your code in three parts.
Model: It contains the logic code
View: it contains the interface in .html, .xml form
Controller: Call of both model and view when it’s needed

QNo 9: What is Polymorphism??

Ans: Many forms of an object like motor_bike class can be extended into “Yamaha” and “Suzuki”

QNo 10: Why ob_start() and ob_get_clean() is used??

Ans: ob_start is used to buffer the output and ob_get_clean is used to stop the buffering. Here is an example:
<?php ob_start();
echo “Hello World”;
?>
Thanx
<?php $content=ob_get_clean(); ?>
So the content of the $content will be
Hello World
Thanx

Final Words

If you want to ask any other question then you can simply use comment section. I will try to reply you soon. Stay Blessed.