PHP Interview Questions and Answers

what is the use of mysql_fetch_array() function in php ?

This function returns a row from the table as an associative array or numeric array.

Write down the code for upload a file in php..

0) { echo “Error: ” . $_FILES["file"]["error"] . “
”; } else { echo “Upload: ” . $_FILES["file"]["name"] . “
”; echo “Type: ” . $_FILES["file"]["type"] . “
”; echo “Size: ” . ($_FILES["file"]["size"] / 1024) . ” Kb
”; echo “Stored in: ” . $_FILES["file"]["tmp_name"]; } ?>

what is the use of the function " explode() " in php?

This function is used to split a string by special character or symbol in the string, we must be pass the string and splitting character as parameter into the function.

What is use of in_array() function in php ?

in_array used to checks if a value exists in an array

How to retrieve the data from MySQL result set ?

using the methods given below 1. mysql_fetch_row. 2. mysql_fetch_array 3. mysql_fetch_object 4. mysql_fetch_assoc

differences between GET and POST methods ?

We can send 1024 bytes using GET method but POST method can transfer large amount of data and POST is the secure method than GET method .

What is SSL ?

SSL stands for Secure Sockets Layer. This is a cryptographic protocols which provide secure communications on the Internet

How to calculate the sum of values in an array ?

"array_sum" method used for calculate sum of values in an array

What is the use of "ksort" in php?

it is used for sort an array by key in reverse order.