File extension Details of PEM, PSP, P12, PHP, PHTM, PHTML, PHP4, PHP3, PHP5

Name:	PEM
File Type:	Privacy Enhanced Mail Certificate
Popularity:	3
Category:	web
File Description:	Base64-encoded certificate file, such as a PEM-encoded X509 certificate; used to authenticate a secure website; typically imported from a Unix-based Apache Web server and compatible with OpenSSL applications. PEM certificate files are generated automatically and are not meant to be opened or edited manually; some secure websites may ask users to upload a PEM file (possibly sent in an e-mail) in order to authenticate their identity.
Open Programs:	Mac OS Web server with OpenSSL installed Windows Microsoft Internet Information Server (IIS) Linux Web server with OpenSSL installed

Name:	PSP
File Type:	PL/SQL Server Page
Popularity:	3
Category:	web
File Description:	Web page that contains code written in the Procedural Language/Structured Query Language (PL/SQL); includes SQL database commands that use Oracle's proprietary PL/SQL syntax; used for dynamically accessing database information when generating Web page content. PSP pages can be viewed in a Web browser; however the user will only see the content generated by the server, not the actual PL/SQL code.
Open Programs:	Mac OS View in a Web browser Edit with a text editor Windows Create with Oracle Database software View in a Web browser Edit with a text editor

Name:	P12
File Type:	Personal Information Exchange
Popularity:	3
Category:	web
File Description:	SSL certificate used to authenticate a secure website on a Microsoft IIS Web server
Open Programs:	Windows Microsoft Internet Information Server (IIS)

Name:	PHP
File Type:	Hypertext Preprocessor File
Popularity:	5
Category:	web
File Description:	Web page that may contain PHP code; may include PHP functions that can process online forms, get the date and time, or access information from a database, such as MySQL database. The PHP code within the Web page is processed (parsed) by a PHP engine on the Web server, which dynamically generates HTML; the HTML, which contains the Web page content, is then sent to the user's Web browser; therefore, the user never sees the actual PHP code contained in the Web page, even when viewing the page source.
Open Programs:	Mac OS Run from Apache Web server with PHP View in a Web browser Edit with a text editor Windows Run from Windows Server with PHP View in a Web browser Edit with a text editor Linux Run from Apache Web server software with PHP

Name:	PHTM
File Type:	PHP-Based Web Page
Popularity:	1
Category:	web
File Description:	Web page that contains PHP code; parsed by a PHP engine on the Web server, which dynamically generates HTML that is sent to the client's browser; often used for accessing database information. PHP pages may also use the .PHTML extension, though the standard .PHP extension is the most common.
Open Programs:	Mac OS View in a Web browser Edit with a text editor Windows View in a Web browser Edit with a text editor

Name:	PHTML
File Type:	PHP Web Page
Popularity:	1
Category:	web
File Description:	Web page that contains PHP code; parsed by a PHP engine on the Web server, which dynamically generates HTML; often used for database access, such as retrieving data from a MySQL database; can be run using Apache or Windows Server with the PHP engine installed. PHP pages typically use the .PHP file extension.
Open Programs:	Mac OS Run using a Web server with PHP installed View in a Web browser Edit with a text editor Windows Run using a Web server with PHP installed View in a Web browser Edit with a text editor

Name:	PHP4
File Type:	PHP 4 Web Page
Popularity:	1
Category:	web
File Description:	Web page that may include PHP 4 code; the PHP script is parsed by a PHP engine on the Web server before being sent to the user's Web browser; the script then generates HTML code, which is sent to the user's browser; PHP pages are often used to access database information, such as data from a MySQL database. PHP4 pages can be processed and run on a Web server with the PHP engine installed; examples include Apache, Windows Server, and Mac OS X Server; they can also be edited with a text editor. Most PHP pages use the standard .PHP file extension.
Open Programs:	Mac OS Run using Mac OS X Server with PHP support Open with a text editor View in a Web browser Windows Run with Apache Run using Windows Server with the PHP engine Open with a text editor View in a Web browser

Name:	PHP3
File Type:	PHP 3 Web Page
Popularity:	2
Category:	web
File Description:	Web page that may contain PHP 3 code; the PHP code within the page is parsed by a PHP engine on the Web server, which dynamically generates HTML that is sent to the user's Web browser; often used in combination with a database, such as MySQL. PHP3 pages can be processed by Apache, Windows Server, or Mac OS X Server with the PHP engine installed; they can be edited with a text editor or Web development program. PHP pages generally use the .PHP file extension.
Open Programs:	Mac OS Run using Mac OS X Server with PHP support Open with a text editor View in a Web browser Windows Run with Apache Run using Windows Server with the PHP engine Open with a text editor View in a Web browser

Name:	PHP5
File Type:	PHP 5 Web Page
Popularity:	1
Category:	web
File Description:	Web page that may contain PHP code; PHP functions are parsed by a PHP engine on the Web server, which dynamically generates HTML; often used for accessing data from a database management system, such as MySQL. Most PHP pages use the standard .PHP extension.
Open Programs:	Mac OS Run on a Web server with PHP support View in a Web browser Edit with a text editor Windows Run on a Web server with PHP support View in a Web browser Edit with a text editor

Name:	STL
File Type:	Certificate Trust List   (Most common)
Popularity:	3
Category:	web
File Description:	List of predefined items that have been signed by a trusted entity; may consist of a list of filenames or a list of certificates; each item in the list has been approved by the signing entity. Certificate trust lists (CTLs) are used by Microsoft IIS to store trusted websites and other addresses that require a secure connection.
Open Programs:	Windows Microsoft Internet Information Services (IIS)