Query string is a small amount of data and URL address followed by “?” symbol along with form data if you want to transfer some extra information from browser to [ … ]

Variable: Variable is name of memory location used to store some information. PHP is loosely typed language that is why no need to provide data typed at the time of variable [ … ]

By this function we can encode and decode the input string it is divide into two types. 1. One way Encryption 2. Two way Encryption One way Encryption: By using [ … ]

This concept is used to include a PHP script in another PHP script the available functions are., 1. include 2. include_once 3. required 4. required_once If we include the external [ … ]

In php there are 4 different types of errors. 1. Notice 2. Warning 3. Fatal Error 4. Parse Error Notice: Notice is small information to the end user do not [ … ]

addslashes: To add black slashes infront of single and double quotations. stripslashes: This is used to remove the back slashes infront of single and double quotations. <?php $str=”wel’come”; $str1=$str; echo addslashes($str1); [ … ]

strlen(): This function is used to get the length of string.<?php$str=”Welcome”echo strlen($str);?>Output: 7 ucwords:  This function is used to convert the first characters of all words in a string into uppercase .<?php$str=”welcome [ … ]

By these functions we get the current dates time information as time stamp. It returns output in the form of times stamp value. Times Stamp: It returns total number of seconds [ … ]

Array is collection of heterogeneous element PHP is loosely typed language so we can store heterogeneous elements is array. The main difference between the normal variable and the array variable [ … ]

Datatype are used to specify the type of variable according to the assigned value. PHP is loosely typed language so there is no need to provide data types at the [ … ]