Preserving State With Query Strings

Saving State with Query Strings in PHP

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Saving State with Query Strings in PHP A query string is used to pass small amounts of data between browser requests. Common uses of query strings are: Remembering a user’s entered keywords when using a …

Building Query Strings in PHP

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Building Query Strings in PHP Query strings are not limited to form data. Query string is simply a string of characters stored in a URL, a user can manually create a URL containing a query …

Accessing Data in Query Strings in PHP

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Accessing Data in Query Strings in PHP To access the field names and values in a query string you simply use the $_GET superglobal array function. Syntax $firstName = $_GET[“firstName”]; Example Here, we will illustrate an example …

Working with Cookies in PHP

PHP 5.6 Tutorial, Preserving State With Query Strings 298

Working with Cookies in PHP Cookies allow users to store a small amount of data, not more than 4KB within the user’s browser itself. Then, whenever the browser requests a page on the Web site, …

Cookie Components in PHP

PHP 5.6 Tutorial, Preserving State With Query Strings 300

Cookie Components in PHP A cookie is sent from the server to the browser as part of the HTTP headers. Here we will illustrate an example of an HTTP header to create a cookie: Set-Cookie: …

Setting a Cookie in PHP

PHP 5.6 Tutorial, Preserving State With Query Strings 327

Setting a Cookie in PHP PHP provides a built – in function, setcookie() , that can send the appropriate HTTP header to create the cookie on the browser. Here, you will learn how to set …

Accessing Cookies Scripts In PHP

PHP 5.6 Tutorial, Preserving State With Query Strings 384

Accessing Cookies Scripts In PHP To Access cookies in PHP is very easy: A user can simply read values from the $_COOKIE superglobal array. To display the pageViews cookie set use : echo $_COOKIE[“pageViews”]; // …

Removing Cookies In PHP

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Removing Cookies In PHP If a user no longer needs a cookie that is stored on the user’s browser, then a user can instruct the browser to delete it. To delete a cookie, a user …

Working with Sessions in PHP

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Although cookies are a useful way to store data but they have some problems like Firstly, they are not very secure. As with form data and query strings, an attacker can easily modify a cookie’s …

Creating a PHP Session

PHP 5.6 Tutorial, Preserving State With Query Strings 383

PHP Session new session, this function generates a unique SID for the session and sends it to the browser as a cookie called PHPSESSID (by default). However, if the browser has sent a PHPSESSID cookie …

Reading and Writing Session Data in PHP

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Working with session data in PHP is also simple. A user can store all the session data as keys and values in the $_SESSION[] superglobal array. So a user might store the user’s first name …

Destroying a Session

PHP 5.6 Tutorial, Preserving State With Query Strings 310

As earlier you have read that by default PHP sessions are automatically deleted when users quit their browser, because the PHPSESSID cookie ’ s expires field is set to zero. However, sometimes a user might …