Author: Awais Farooq
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Login Example
A typical PHP web application authenticates the user before logging in, by asking his credentials such as username and password. The credentials are then checked against the user data available with the server. In this example, the user data is available in the form of an associative array. The following PHP Login script is explained below − HTML…
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Loops
At times, certain instructions require repeated execution. Loops are an ideal way to do the same. A loop represents a set of instructions that must be repeated. In a loop’s context, a repetition is termed as an iteration. The following figure illustrates the classification of loops − Let’s start the discussion with Definite Loops. A loop…
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DOM Parser Example
The DOM extension in PHP comes with extensive functionality with which we can perform various operations on XML and HTML documents. We can dynamically construct a DOM object, load a DOM document from a HTML file or a string with HTML tag tree. We can also save the DOM document to a XML file, or…
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SAX Parser Example
PHP has the XML parser extension enabled by default in the php.ini settings file. This parser implements SAX API, which is an event-based parsing algorithm. An event-based parser doesn’t load the entire XML document in the memory. instead, it reads in one node at a time. The parser allows you to interact with in real…
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Operators
An expression is a special kind of statement that evaluates to a value. Every expression is composed of − Consider the following expression – “2 + 3”. In this expression, 2 and 3 are operands and the symbol “+” (plus) is the operator. In this chapter, we will discuss the operators that are available in Dart. Arithmetic Operators…
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Simple XML Parser
The SimpleXML extension of PHP provides a very simple and easy to use toolset to convert XML to an object that can be processed with normal property selectors and array iterators. It is a tree_based parser, and works well with simple XML files, but may face issues when working with larger and complex XML documents.…
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Variables
A variable is “a named space in the memory” that stores values. In other words, it acts a container for values in a program. Variable names are called identifiers. Following are the naming rules for an identifier − Type Syntax A variable must be declared before it is used. Dart uses the var keyword to…
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XML Introduction
With the help of PHP’s built-in functions and libraries, we can handle manipulation of XML data. XML, which stands for eXtensible Markup Language, is a data format for structured document interchange, especially on the Web. XML is a popular file format used for serialization of data storing the data, transmitting it to another location, and…
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Data Types
One of the most fundamental characteristics of a programming language is the set of data types it supports. These are the type of values that can be represented and manipulated in a programming language. The Dart language supports the following types− Numbers Numbers in Dart are used to represent numeric literals. The Number Dart come…
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Syntax
Syntax defines a set of rules for writing programs. Every language specification defines its own syntax. A Dart program is composed of − Your First Dart Code Let us start with the traditional “Hello World” example − Live Demo The main() function is a predefined method in Dart. This method acts as the entry point to the…