curl,cURL support,PHP Curl Support,Provides the ability for this server to connect to other remote servers and send or receive data.
PHP Core,allow_call_time_pass_reference,Allow Call Time Pass Reference,[DEPRECATED] - Coding method for passing the actual variables rather than copying it.
PHP Core,allow_url_fopen,Allow URL fopen,Similar to Curl.  Provides the ability to open a URL on an external server via the fopen function.
PHP Core,file_uploads,File Uploads,Allows uploading of files from the client to the server.
PHP Core,ignore_user_abort,Ignore User Abort,Allows PHP scripts to continue running into finish even if the client aborts the connection or stops loading the page.
PHP Core,magic_quotes_gpc,Magic Quotes (GPC),Automatically escape all form data sent by the client to the server.
PHP Core,magic_quotes_runtime,Magic Quotes (runtime),Automatically escape all form data sent by the client to the server.
PHP Core,max_execution_time,Maximum Execution Time (secs),Maximum amount of time that a script may run before it is killed.
PHP Core,max_input_time,Maximum Input Time (secs),Maximum amount of time to accept input.
PHP Core,memory_limit,Memory Limit (Kb),Maximum amount of memory that an individual PHP process can use.
PHP Core,register_globals,Register Globals,[DEPRECATED] - Automatically registers user form input as variables. Highly discouraged. REMOVED as of PHP 6.0.0.
PHP Core,safe_mode,Safe Mode,[DEPRECATED] - PHP safe mode is an attempt to solve the shared-server security problem. It is architecturally incorrect to try to solve this problem at the PHP level but since the alternatives at the web server and OS levels aren't very realistic many ncorrectly use safe mode for now. REMOVED in PHP 6.0.0.
ftp,FTP support,FTP Support,This enables PHP to connect and access remote FTP servers for viewing, uploading, or downloading remote files.
gd,GD Support,PHP GD Support,GD is an image library that allows PHP to manipulate images.  This is useful for resizing, cropping, generating new images, or modifying images in other various ways.  Many scripts use GD for generating image thumbnails or resizing images.
json,json support,PHP JSON Support,JSON is a simple standardized format for use with communicating with Javascript.  This is often used in conjuction with AJAX applications.
mcrypt,,MCRYPT Support,MCRYPT allows for encryption/decryption.  This is very useful for securing data for storage or transmission.
mysql,,mySQL Support,mySQL is used for database access to a mySQL database.  Databases are used extensively in web services such as WordPress forums and much much more.  mySQL is one of the most popular database systems.
mysqli,,mySQLi Support,mySQLi (mySQL Improved) is the new updated sys
session,Session Support,Session Support,Sessions allow user information or logins to be held without storing the information in cookies.
sockets,Sockets Support,Sockets Support,Sockets allow scripts to communicate directly with other remote servers directly.
zip,Zip,ZIP,Provides some ZIP functionality for this server to use ZIP files for reading or writing.
Environment,NUMBER_OF_PROCESSORS,Number of Processors,Number of CPU (processor) cores on the server machine.  More cores generally means better performance especially with multitasking.
Environment,OS,Server Operating System,The operating system running on the server machine, such as Linux or Windows.
System,,Server Operating System,Full title of the operating system of the server.
PHP Configuration,System,Server Operating System,The operating system running on the server machine, such as Linux or Windows.
Environment,PROCESSOR_ARCHITECTURE,Processor Architecture,The type of architecture of the CPU (processor) on the server machine.
Environment,PROCESSOR_IDENTIFIER,Processor Identifier,Detailed information about the CPU (processor) on the server machine.
Environment,COMPUTERNAME,Computer Name,The assigned name of the server machine.
Environment,SystemDrive,System Drive,The hard drive assigned as the system drive on the server machine.
PHP Variables,_SERVER["SERVER_PROTOCOL"],Server Protocol,Web server protocol version on the server machine.
PHP Variables,_SERVER["SERVER_SOFTWARE"],Server Software,Web server software on the server machine.
PHP Variables,_SERVER["DOCUMENT_ROOT"],Web Document Root,Root folder on the web server where HTML or PHP documents are served from.
PHP Variables,_SERVER["HTTP_CONNECTION"],HTTP Connection Settings,Additional HTTP protocol settings being used for this session.
PHP Variables,_SERVER["HTTP_KEEP_ALIVE"],Keep-Alive Time,Keep-Alive time for the HTTP protocol.
PHP Variables,_SERVER["HTTP_HOST"],HTTP Host,Host / domain currently being used to accesss this page.
PHP Release Date,,PHP Release Date,This is the official release date according to PHP.net's records for your version.
PHP Configuration,Build Date,PHP Compile Date,This is the date when your copy of PHP was compiled.  For binary versions (ie Windows) this is near the official release date.
Exec() Function,,Exec() Function Support,The exec function allows PHP scripts to execute programs or commands.
PHP ZipArchive Support,,ZipArchive Class Support,This is the date when your copy of PHP was compiled.  For binary versions (ie Windows) this is near the official release date.
disabled_function,exec,exec() function not disabled,Some hosts disable this functino for additional security.  Disabling it can cause loss of access to useful functions and features though.
php_release_date,,PHP Release Date,Official release date of your current PHP version. We recommend keeping your PHP up to date to maximize security and performance.
php_compile_date,,PHP Compile Date,Date when this installation of PHP was compiled.  For binary versions this will usually be the same or similar to the PHP Release Date.
php_version,,PHP Version,Version of PHP currently running this script.
mysql_version,,mySQL Version,This is the version of mySQL (database server) as reported by WordPress.
wp_version,,WordPress Version,Version of WordPress that this plugin is currently running from within. Keeping WordPress up to date is very important for compatibility and security.
memory_get_usage,,Current PHP Memory Usage (MB),This is the current amount of memory being used by this PHP process in MB.
memory_get_peak_usage,,Peak PHP Memory Usage (MB),This is the peak amount of memory used by this PHP process in MB since it started.
fileperms,,File Permissions for '%s',File permissions numeric for the given file or directory.
browser,,Your current Web Browser,This is a general check to see what web browser you are currently running.  In particular to insure that you are NOT running Microsoft Internet Explorer as it is both insecure and breaks web standards and best practices.  http://getfirefox.com