In PHP this unbuilt function is used to count the current elements in the array. If it has been set to an empty array, whether the function might return 0…
GET POST In browser history parameters remain because they are the part of the URL In browser history parameters remain because they are the part of…
The unlink () and unset () functions are used to do some undo operations but used in different situations because both acts differently. unlink () function In PHP unlink ()…
PHP session is used to store and pass information from one page to another page temporarily until the user closes website. In shopping website PHP website is widely used where…
PHP constants are identifier or name that can’t be changed during the execution of the script except for magic constants, which are not really constants. Constants can never be undefined…
PHP is not a function; it is a language construct and its output become one or more string. If you want to pass more than one parameter to echo, the…
In PHP null () function is an inbuilt function which is used to find whether a variable is NULL or not. If it returns True the given variable is null,…
In a programmer, error is a mistake that may be caused by writing incorrect code or incorrect syntax. An error message is displayed on your browser containing the filename along…
In PHP an array is a type of data structure that allows us to store multiple elements of similar data type under a single variable thereby saving us the effort…
In PHP we can create and use forms in which we need to use PHP superglobals $_GET and $_POST to get form data. If the form request get or post…
In PHP magic constants are the predefined constants which is used on the basis of their use. Constants are created by various extensions and there are nine magic constants in…
Like any other language, in PHP loop is used to execute a statement or a block of statements, multiple times until and unless a specific condition is met. Loops helps…
In PHP cookie is a small file with a maximum size of 4KB that the web server stores on the client computer. Cookies are typically used to keep track of…
Performance Compare to other languages such as JSP and ASP, PHP script is executed much faster than those scripts which are written. The server workload and loading time is automatically…
PHP File provides various functions to read data. There are different functions that allow you to read all file data, read data character by character and read data line by…
PHP data types are used to hold different types of values or data. There are eight primitive data types which are further categorized into three types, they are: Scalar types…
Database is a collection of inter-related data which helps in insertion, retrieval and deletion of data from database and organizes the data in the form of views, tables, reports,…
ER stands for Entity-Relationship model. It is a high level data model. If any data elements or relationship of any specified system can defined using this model. Conceptual design for…
High Cost Disadvantage of DBMS is its high cost of software and hardware. For users to use a DBMS they require a high speed processor and huge memory size and…
There are 7 keys in DBMS Primary Key Key which is used to identify one and only instance of entity uniquely. An Enity can contains multiple keys, and keys which…