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Internet Explorer 8 takes the Web experience beyond the page and introduces a new way to seamlessly experience the power of the Web whether you are a Web developer writing to standards, or an end user discovering a new online service.

This beta release is available to everyone, but is primarily for Web developers and designers to test the new tools, layout engine, and programming enhancements.

Download : Internet Explorer 8 Beta 1 for Windows Vista | 64-Bit

Download : Internet Explorer 8 Beta 1 for Window XP SP2

Download : Internet Explorer 8 Beta 1 for Windows Server 2003 | 64-Bit
News source : Internet Explorer 8

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. Much of its syntax is borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in. The goal of the language is to allow web developers to write dynamically generated pages quickly. It is a project of the Apache Software Foundation.

Download : PHP 5.2.3 | Linux

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. Much of its syntax is borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in. The goal of the language is to allow web developers to write dynamically generated pages quickly. It is a project of the Apache Software Foundation.

Download: PHP 5.2.2 For Windows | For Linux (Tar.bz2)

The Internet Explorer 7 Readiness Toolkit provides an easy way for any audience that is involved in the development, test, deployment or support of Web sites, extensions, and/or applications to prepare for Internet Explorer 7.
The Toolkit provides the following:
• Updated! Testing guidance and tips for isolating and identifying a particular compatibility problem.
• Updated! Improvded the navigation to help find informaitn.
• Pointer to the latest publicly available build of Internet Explorer 7.
• Developer Checklist including new features and changes of interest to application and Web developers should be aware of.
• Tools for development and testing.
• Links to resources, technical articles, and helpful blog posts.
• Various methods for providing feedback to Microsoft.

Download | MoreInfo

Internet Explorer 7 Beta 2 Preview includes advancements in security and browsing experience for end users, functionality and compatibility for developers, and manageability for corporate network administrators. Beta 2 Preview is intended to enable developers, Web developers and IT pros to begin to test the new browser for compatibility with their applications and Web sites. Read the Technology Overview to learn more.
Uninstallation
When installing it, you’ll want to uninstall your previous IE7 builds. To uninstall an IE7 build:

• Click "Start," and then click "Control Panel."
• Click "Add or Remove Programs."
• Check "Show Updates" at the top of the dialog box.
• Scroll down the list to "Windows XP - Software Updates," select "Internet Explorer 7 Beta 2 Preview," and then click "Change/Remove."

If "Internet Explorer 7 Beta 2 Preview" does not exist, run %windir%$NtUninstallie7bet2p$spuninstspuninst.exe (where %windir% is your home Windows directory). You will need to have "view hidden folders" enabled.
In the rare circumstances where you cannot find that directory and IE7 is not listed in the Control Panel, IE7 setup automatically creates a system restore point before making any changes. Use System Restore to restore your computer back to your original install point. This is not 100% effective so please back up important documents prior to using System Restore.

download:
http://download.microsoft.com/download/6/5/6/6566e112-40cf-4890-aa5a-57da51daefec/IE7B2P-WindowsXP-x86-enu.exe

Internet Explorer 7 Beta 3 includes advancements in security and browsing experience for end users, functionality and compatibility for developers, and manageability for corporate network administrators. Beta 3 is intended to enable developers, web developers, and IT professionals to begin to test the new browser for compatibility with their applications and websites. Read the Technology Overview to learn more.
Download: XP SP2 | Server 2003 SP1 | x64 | ia64

Internet Explorer 7 Beta 2 Preview includes advancements in security and browsing experience for end users, functionality and compatibility for developers, and manageability for corporate network administrators. Beta 2 Preview is intended to enable developers, web developers and IT pros to begin to test the new browser for compatibility with their applications and websites. Read the Technology Overview to learn more.

Download:
Internet Explorer 7.0 Beta 2 Preview | MoreInfo…

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. Much of its syntax is borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in. The goal of the language is to allow web developers to write dynamically generated pages quickly. It is a project of the Apache Software Foundation.
PHP 4.4.2 ChangeLog | PHP 5.1.2 ChangeLog

Download here.

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. Much of its syntax is borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in. The goal of the language is to allow web developers to write dynamically generated pages quickly. It is a project of the Apache Software Foundation.Download | ChangeLogs

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. Much of its syntax is borrowed from C, Java and Perl with a couple of unique PHP-specific features thrown in. The goal of the language is to allow web developers to write dynamically generated pages quickly. It is a project of the Apache Software Foundation.
Download:
PHP 5.1.0聽| ChangeLogs