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- Dynamic Web Application Development Using PHP and MySQL
- Web Development Using PHP
- PHP and MySQL Web Development 5th Edition
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Dynamic Web Application Development Using PHP and MySQL
A short summary of this paper. But as it expanded in scope, a new and more appropriate name was selected by community vote. PHP is a server-side scripting language, which can be embedded in HTML or used as a standalone binary although the former use is much more common.
Much of its syntax is borrowed from C. This release already had the basic functionality that PHP has today. The syntax was similar to Perl but was more limited and simpler, although less consistent. Since this would cause major changes both to the internals of the language and to user code, it was planned to release this as version 6. However, a shortage of developers who understood the necessary changes, and performance problems arising from conversion to and from UTF, which is rarely used in a web context, led to delays in the project.
As a result, a PHP 5. In March , the project in its current form was officially abandoned, and a PHP 5. Initial hopes were that a new plan would be formed for Unicode integration, but as of none have been adopted.
The numbering of this version involved some debate. While the PHP 6 Unicode experiment had never been released, several articles and book titles referenced the PHP 6 name, which might have caused confusion if a new release were to reuse the name.
After a vote, the name PHP 7 was chosen. Changes from phpng are also expected to make it easier to improve performance in the future, as more compact data structures and other changes are seen as better suited for a successful migration to a just-in-time JIT compiler. Major versions of PHP are allowed to break backwardcompatibility of code and therefore PHP 7 presented an opportunity for other improvements beyond phpng that require backward-compatibility breaks.
Many fatal-or recoverable-level legacy PHP error mechanisms were replaced with modern object-oriented exceptions. Constructors for the few classes built-in to PHP which returned null upon failure were changed to throw an exception instead, for consistency.
Support for hexadecimal number support in some implicit conversions from strings to number types was removed. Conversions between integers and floating point numbers were tightened and implemented more consistently across platforms. We might use the command-line scripts for system administration tasks, such as backup and log parsing.
With PHP, creating web pages with dynamic content from a database is remarkably simple. Each code line in PHP must end with a semicolon. The semicolon is a separator and is used to distinguish one set of instructions from another. To output a string, we use PHP echo. We can place either a string variable or we can use quotes, like we do below, to create a string that the echo function will output. The text we are outputting is being sent to the user in the form of a web page, so it is important that we use proper HTML syntax!
PHP printThe print statement can be used with or without parentheses: print or print. They are both used to output data to the screen. The differences are small: echo has no return value while print has a return value of 1 so it can be used in expressions. PHP VariablesA variable is used to store information.
A variable is a means of storing a value, such as text string "Hello World! A variable can then be reused throughout our code, instead of having to type out the actual value over and over again. Also, variable names are case-sensitive, so use the exact same capitalization when using a variable. In the example above, we see that we do not have to tell PHP which data type the variable is.
PHP automatically converts the variable to the correct data type, depending on its value. In a strongly typed programming language, we have to declare define the type and name of the variable before using it. In PHP, the variable is declared automatically when we use it. However, sometimes we want a local variable not to be deleted.
We need it for a further job. To do this, we use the static keyword when we first declare the variable: Then, each time the function is called, that variable will still have the information it contained from the last time the function was called.
The variable is still local to the function. The concatenation operator. What a nice day! Figure Concatenation OperatorWe used the concatenation operator two times.
This is because we had to insert a third string a space character , to separate the two strings. Predefined String Functions The strlen function:The strlen function is used to return the length of a string. The strpos function:The strpos function is used to search for character within a string. If a match is found, this function will return the position of the first match.
The reason that it is 6 and not 7 , is that the first position in the string is 0, and not 1. The strpos function is case-sensitive. The stripos returns the position of the first occurrence of a string inside another string caseinsensitive. If the start parameter is a negative number and length is less than or equal to start, length becomes 0.
This function is case-sensitive. For a case-insensitive search, we use stristr function. Figure strchr function The strcmp function:The strcmp function compares two strings. The strcmp function is case-sensitive. The value cannot be changed during the script. Unlike variables, constants are automatically global across the entire script. To create a constant, use the define function Arguments are specified after the function name, inside the parentheses.
We can add as many arguments as we want, just separate them with a comma. We can let a function return a value using return statement. An array can hold many values under a single name, and we can access the values by referring to an index number. Some arrays are referenced by numeric indices; others allow alphanumeric identifiers.
Built-in functions let us sort them, add or remove sections, and walk through them to handle each item through a special kind of loop.
And by placing one or more arraysinside another, we can create arrays of two, three, or any number of dimensions. By default array index starts from zero. PHP Associative Arrays:The associative arrays are very similar to numeric arrays in term of functionality but they are different in terms of their index. Associative array will have their index as string so that we can establish a strong association between key and values.
To store the salaries of employees in an array, a numerically indexed array would not be the best choice. Instead, we could use the employees names as the keys in our associative array, and the value would be their respective salary. Loop through an Associative ArrayTo loop through and print all the values of an associative array, we use a foreach loop. In multi-dimensional array each element in the main array can also be an array.
And each element in the sub-array can be an array, and so on. Values in the multi-dimensional array are accessed using multiple index.
Sorting ArraysThe elements in an array can be sorted in alphabetical or numerical order, descending or ascending. In this chapter, we will go through the following PHP array sort functions: PHP Global Variables -SuperglobalsSeveral predefined variables in PHP are "superglobals", which means that they are always accessible, regardless of scope -and can be accessed from any function, class or file without having to do anything special.
The entries in this array are created by the web server. Conditional StatementsVery often when we write code, we want to perform different actions for different decisions.
We can use conditional statements in our code to do this. Switch statement is used to select one of many blocks of code to be executed. After the information is encoded it is sent to the server. The page and the encoded information are separated by the? The GET method is restricted to send upto characters only. GET can't be used to send binary data, like images or word documents, to the server.
However, because the variables are displayed in the URL, it is possible to bookmark the page. GET should never be used for sending passwords or other sensitive information! This can be useful in some cases. GET may be used for sending non-sensitive data.
The POST method does not have any restriction on data size to be sent. This will help developers to make it easy to change the layout of complete website with minimal effort.
Web Development Using PHP
PHP: The Right Way is an easy-to-read, quick reference for PHP popular coding standards, links to authoritative tutorials around the Web and what the contributors consider to be best practices at the present time. There is no canonical way to use PHP. This website will also not tell you which tools to use, but instead offer suggestions for multiple options, when possible explaining the differences in approach and use-case. This is a living document and will continue to be updated with more helpful information and examples as they become available. Go to Leanpub. Help make this website the best resource for new PHP programmers!
Show all documents They focus on the selection, arrangement and presentation of the most appropriate design for the particular software application. They are used for the implementation of a simple, multifunctional interactive multimedia tool, which was developed using the generalized model . Its main purpose is to allow clients create alone their preliminary rough interface design vision of the future software. After that they just have to present the final result to application developers, avoiding misunderstanding what exactly client wants. In that way, both participants in this process save their time.
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PHP and MySQL Web Development 5th Edition
Introductory textbook covering all the main features of the 'web programming' languages PHP and MySQL together with detailed examples that will enable readers whether students on a taught course or independent learners to use them to create their own applications or understand existing ones. Each chapter includes aims, a summary and practical exercises with solutions to support learning. Chapters are designed to stand alone as far as possible, so that they can be studied independently of the rest of the text by those with some previous knowledge of the languages. There is a comprehensive glossary of technical terms, together with extensive appendices for quick reference of language features.
We've taken the best and made it even better. Through a clear, practical approach, you will learn to develop secure, dynamic websites by integrating and implementing the PHP scripting language and the MySQL database system. Real-world examples and working sample projects will give you a strong foundation on which to start building your own websites, complete with features such as SSL, shopping carts and payment systems. Find out for yourself!
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