'C:\Program' is not recognized as an internal or external command

This seems to happen from time to time with programs that are very sensitive to command lines, but one option is to just use the DOS path instead of the Windows path. This means that C:\Program Files\ would resolve to C:\PROGRA~1\ and generally avoid any issues with spacing.

So your command would like below:

C:\PROGRA~1\.......

Using php execute command/run another php file wihtout waiting for result

<?php
session_start();
$_SESSION["student_name"] = "Pritom Kumar Mondal";
$_SESSION["roll"] = "College: 2150, Varsity: 060238";
echo "Start time: " . date('h:i:s');
$phpCommandLocation = "C:\\xampp\\php\\php.exe";
$phpFileLocation    = "C:\\xampp\\htdocs\\test1\\call.php";
$logLocation        = "C:\\tmp\\result.log";
$argvList = " session_id=".session_id(); /*You can send session id*/ 
$argvList.= " name=".rawurlencode("Pritom Kumar Mondal");
$command            = $phpCommandLocation . " -f " .           .
    $phpFileLocation . $argvList . " 1>>" . $logLocation . " 2>&1 &"; 
pclose(popen("start /B " . $command, "r"));
echo "<BR>End time: " . date('h:i:s'); 
?>

And output is:
Start time: 11:07:26
End time: 11:07:26

And call.php looks like:
<?php
foreach($argv as $argvString) {
    $argvStringList = explode("=", $argvString);
    if($argvStringList[0] == "session_id") {
        session_id($argvStringList[1]);
        session_start();
        /* Start session with received session id, BINGO... */
    }
}
$string = "\r\n-------------------------------\r\nStart time: " . date('h:i:s'); 
$string .= "\r\nStart sleeping for 5 seconds."; 
sleep(5); 
$string .= "\r\nEnd time: " . date('h:i:s');
 file_put_contents("data.txt",  
    "SOMETHING WENT GOOD...................\r\n" 
    . $string);
echo $string; 
echo "\r\nReceived argv list: ";
print_r($argv); /* Printing argv as array */
echo "\r\nPrevious index.php session variables in currently executed php: ";
print_r($_SESSION); /* Printing argv as array */
?>
Yellow background showing that this script wait for 5 seconds.

The C:\\tmp\\result.log is:
-------------------------------
Start time: 11:07:28
Start sleeping for 5 seconds.
End time: 11:07:33
Received argv list: 
Array
(
    [0] => C:\xampp\htdocs\test1\call.php
    [1] => session_id=gjbf54ql8dhuvg0njsgt4hh8n7
    [2] => name=Pritom%20Kumar%20Mondal%2C%20Roll%3D2525
) 
Previous index.php session variables in currently executed php:
Array
(
    [student_name] => Pritom Kumar Mondal
    [roll] => College: 2150, Varsity: 060238
)

There are a few thing that are important here.

First of all: put the full path to the php binary, because this command will run under the apache user, and you will probably not have command alias like php set in that user.

Seccond: Note 2 things at the end of the command string: the '2>&1' and the '&'. The '2>&1' is for redirecting errors to the standard IO. And the most important thing is the '&' at the end of the command string, which tells the terminal not to wait for a response.

Third: Make sure you have 777 permissions on the 'result.log' file

If you use linux operating system just write:

<?php
exec($command . " > /dev/null &"); 
?>

Get event click list item in J2ME

In midp a list is actually more like a menu with a selection of choices. You have to set a command on it, so that in your command action you can dispatch on this command, get the selection form the menu and set the next screen accordingly.

package com.pkm;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.*;

/**
 * @author User
 */
public class HelloMIDlet extends MIDlet implements javax.microedition.lcdui.CommandListener {
    private Display display;
    
    private Form form = new Form("Sign In Please");
    
    private Command submit = new Command("Submit", Command.SCREEN, 1);
    private Command exit = new Command("Exit", Command.EXIT, 1);
    private Command contactList = new Command("contactList", Command.OK, 1);
    private Command selection=new Command("Select", Command.ITEM, 1);
    
    List services;
    
    private TextField userName = new TextField("First Name:", "", 50, TextField.ANY);
    private TextField password = new TextField("Password", "", 30, TextField.PASSWORD);

    public HelloMIDlet() {
        display = Display.getDisplay(this);
        form.addCommand(submit);
        form.addCommand(exit);
        form.append(userName);
        form.append(password);
        form.setCommandListener(this);
    }

    public void startApp() {
        display.setCurrent(form);
    }

    public void pauseApp() {
    }

    public void destroyApp(boolean unconditional) {
    }

    public void commandAction(Command command, Displayable displayable) {
        if (command == submit) {
            validateUser(userName.getString(), password.getString());
        } else if (command == exit) {
            destroyApp(false);
            notifyDestroyed();
        } else if (command == contactList) {
            ContactList contactList = new ContactList("Contact List", this);
            display.setCurrent(contactList);
        } else if (command == selection) {
            int index = services.getSelectedIndex();
            Alert alert = new Alert("Your selection",
            "You chose " + services.getString(index) + ".",
            null, AlertType.INFO);
            Display.getDisplay(this).setCurrent(alert, services);
        }
    }
    
    public void validateUser(String name, String password) {
        if (name.equals("a") && password.equals("a")) {
            menu();
        } else {
            tryAgain();
        }
    }
    
    public void menu() {
        services = new List("Choose one", List.IMPLICIT);
        services.append("Check Mail", null);
        services.append("Compose", null);
        services.append("Addresses", null);
        services.append("Options", null);
        services.append("Sign Out", null);
        services.setSelectCommand(selection);
        services.addCommand(contactList);
        services.setCommandListener(this);
        
        display.setCurrent(services);
    }

    public void tryAgain() {
        Alert error = new Alert("Login Incorrect", "Please try again", null, AlertType.ERROR);
        error.setTimeout(Alert.FOREVER);
        userName.setString("");
        password.setString("");
        display.setCurrent(error, form);
    }

    void displayMainMIDlet() {
        menu();
    }
}

A-Z Index of the Windows CMD command line

   ADDUSERS Add or list users to/from a CSV file
   ADmodcmd Active Directory Bulk Modify
   ARP      Address Resolution Protocol
   ASSOC    Change file extension associations•
   ASSOCIAT One step file association
   ATTRIB   Change file attributes
b
   BCDBOOT  Create or repair a system partition
   BOOTCFG  Edit Windows boot settings
   BROWSTAT Get domain, browser and PDC info
c
   CACLS    Change file permissions
   CALL     Call one batch program from another•
   CD       Change Directory - move to a specific Folder•
   CHANGE   Change Terminal Server Session properties
   CHKDSK   Check Disk - check and repair disk problems
   CHKNTFS  Check the NTFS file system
   CHOICE   Accept keyboard input to a batch file
   CIPHER   Encrypt or Decrypt files/folders
   CleanMgr Automated cleanup of Temp files, recycle bin
   CLEARMEM Clear memory leaks
   CLIP     Copy STDIN to the Windows clipboard.
   CLS      Clear the screen•
   CLUSTER  Windows Clustering
   CMD      Start a new CMD shell
   CMDKEY   Manage stored usernames/passwords
   COLOR    Change colors of the CMD window•
   COMP     Compare the contents of two files or sets of files
   COMPACT  Compress files or folders on an NTFS partition
   COMPRESS Compress individual files on an NTFS partition
   CON2PRT  Connect or disconnect a Printer
   CONVERT  Convert a FAT drive to NTFS.
   COPY     Copy one or more files to another location•
   CSCcmd   Client-side caching (Offline Files)
   CSVDE    Import or Export Active Directory data 
d
   DATE     Display or set the date•
   DEFRAG   Defragment hard drive
   DEL      Delete one or more files•
   DELPROF  Delete user profiles
   DELTREE  Delete a folder and all subfolders
   DevCon   Device Manager Command Line Utility 
   DIR      Display a list of files and folders•
   DIRUSE   Display disk usage
   DISKPART Disk Administration
   DNSSTAT  DNS Statistics
   DOSKEY   Edit command line, recall commands, and create macros
   DSACLs   Active Directory ACLs
   DSAdd    Add items to active directory (user group computer) 
   DSGet    View items in active directory (user group computer)
   DSQuery  Search for items in active directory (user group computer)
   DSMod    Modify items in active directory (user group computer)
   DSMove   Move an Active directory Object
   DSRM     Remove items from Active Directory
e
   ECHO     Display message on screen•
   ENDLOCAL End localisation of environment changes in a batch file•
   ERASE    Delete one or more files•
   EVENTCREATE Add a message to the Windows event log
   EXIT     Quit the current script/routine and set an errorlevel•
   EXPAND   Uncompress files
   EXTRACT  Uncompress CAB files
f
   FC       Compare two files
   FIND     Search for a text string in a file
   FINDSTR  Search for strings in files
   FOR /F   Loop command: against a set of files•
   FOR /F   Loop command: against the results of another command•
   FOR      Loop command: all options Files, Directory, List•
   FORFILES Batch process multiple files
   FORMAT   Format a disk
   FREEDISK Check free disk space (in bytes)
   FSUTIL   File and Volume utilities
   FTP      File Transfer Protocol
   FTYPE    Display or modify file types used in file extension associations•
g
   GLOBAL   Display membership of global groups
   GOTO     Direct a batch program to jump to a labelled line•
   GPUPDATE Update Group Policy settings
h
   HELP     Online Help
i
   iCACLS   Change file and folder permissions
   IF       Conditionally perform a command•
   IFMEMBER Is the current user a member of a Workgroup
   IPCONFIG Configure IP
k
   KILL     Remove a program from memory
l
   LABEL    Edit a disk label
   LOCAL    Display membership of local groups
   LOGEVENT Write text to the event viewer
   LOGMAN   Manage Performance Monitor
   LOGOFF   Log a user off
   LOGTIME  Log the date and time in a file
m
   MAPISEND Send email from the command line
   MBSAcli  Baseline Security Analyzer. 
   MEM      Display memory usage
   MD       Create new folders•
   MKLINK   Create a symbolic link (linkd)
   MODE     Configure a system device
   MORE     Display output, one screen at a time
   MOUNTVOL Manage a volume mount point
   MOVE     Move files from one folder to another•
   MOVEUSER Move a user from one domain to another
   MSG      Send a message
   MSIEXEC  Microsoft Windows Installer
   MSINFO32 System Information
   MSTSC    Terminal Server Connection (Remote Desktop Protocol)
   MV       Copy in-use files
n
   NET      Manage network resources
   NETDOM   Domain Manager
   NETSH    Configure Network Interfaces, Windows Firewall & Remote access
   NETSVC   Command-line Service Controller
   NBTSTAT  Display networking statistics (NetBIOS over TCP/IP)
   NETSTAT  Display networking statistics (TCP/IP)
   NOW      Display the current Date and Time 
   NSLOOKUP Name server lookup
   NTBACKUP Backup folders to tape
   NTRIGHTS Edit user account rights
o
   OPENFILES Query or display open files
p
   PATH     Display or set a search path for executable files•
   PATHPING Trace route plus network latency and packet loss
   PAUSE    Suspend processing of a batch file and display a message•
   PERMS    Show permissions for a user
   PERFMON  Performance Monitor
   PING     Test a network connection
   POPD     Restore the previous value of the current directory saved by PUSHD•
   PORTQRY  Display the status of ports and services
   POWERCFG Configure power settings
   PRINT    Print a text file
   PRINTBRM Print queue Backup/Recovery
   PRNCNFG  Display, configure or rename a printer
   PRNMNGR  Add, delete, list printers set the default printer
   PROMPT   Change the command prompt•
   PsExec     Execute process remotely
   PsFile     Show files opened remotely
   PsGetSid   Display the SID of a computer or a user
   PsInfo     List information about a system
   PsKill     Kill processes by name or process ID
   PsList     List detailed information about processes
   PsLoggedOn Who's logged on (locally or via resource sharing)
   PsLogList  Event log records
   PsPasswd   Change account password
   PsService  View and control services
   PsShutdown Shutdown or reboot a computer
   PsSuspend  Suspend processes
   PUSHD    Save and then change the current directory•
q
   QGREP    Search file(s) for lines that match a given pattern.
r
   RASDIAL  Manage RAS connections
   RASPHONE Manage RAS connections
   RECOVER  Recover a damaged file from a defective disk.
   REG      Registry: Read, Set, Export, Delete keys and values
   REGEDIT  Import or export registry settings
   REGSVR32 Register or unregister a DLL
   REGINI   Change Registry Permissions
   REM      Record comments (remarks) in a batch file•
   REN      Rename a file or files•
   REPLACE  Replace or update one file with another
   RD       Delete folder(s)•
   RMTSHARE Share a folder or a printer
   ROBOCOPY Robust File and Folder Copy
   ROUTE    Manipulate network routing tables
   RUN      Start | RUN commands
   RUNAS    Execute a program under a different user account
   RUNDLL32 Run a DLL command (add/remove print connections)
s
   SC       Service Control
   SCHTASKS Schedule a command to run at a specific time
   SCLIST   Display Services
   SET      Display, set, or remove environment variables•
   SETLOCAL Control the visibility of environment variables•
   SETX     Set environment variables permanently
   SFC      System File Checker 
   SHARE    List or edit a file share or print share
   SHIFT    Shift the position of replaceable parameters in a batch file•
   SHORTCUT Create a windows shortcut (.LNK file)
   SHOWGRPS List the Workgroups a user has joined
   SHOWMBRS List the Users who are members of a Workgroup
   SHUTDOWN Shutdown the computer
   SLEEP    Wait for x seconds
   SLMGR    Software Licensing Management (Vista/2008)
   SOON     Schedule a command to run in the near future
   SORT     Sort input
   START    Start a program or command in a separate window•
   SU       Switch User
   SUBINACL Edit file and folder Permissions, Ownership and Domain
   SUBST    Associate a path with a drive letter
   SYSTEMINFO List system configuration
t
   TASKLIST List running applications and services
   TASKKILL Remove a running process from memory
   TIME     Display or set the system time•
   TIMEOUT  Delay processing of a batch file
   TITLE    Set the window title for a CMD.EXE session•
   TLIST    Task list with full path
   TOUCH    Change file timestamps    
   TRACERT  Trace route to a remote host
   TREE     Graphical display of folder structure
   TSSHUTDN Remotely shut down or reboot a terminal server
   TYPE     Display the contents of a text file•
   TypePerf Write performance data to a log file
u
   USRSTAT  List domain usernames and last login
v
   VER      Display version information•
   VERIFY   Verify that files have been saved•
   VOL      Display a disk label•
w
   WAITFOR  Wait for or send a signal
   WHERE    Locate and display files in a directory tree
   WHOAMI   Output the current UserName and domain
   WINDIFF  Compare the contents of two files or sets of files
   WINMSDP  Windows system report
   WINRM    Windows Remote Management
   WINRS    Windows Remote Shell
   WMIC     WMI Commands
   WUAUCLT  Windows Update
x
   XCACLS   Change file and folder permissions
   XCOPY    Copy files and folders
   ::       Comment / Remark•

Check if a program exists from a bash script

$ command -v foo >/dev/null 2>&1 || { 

  echo >&2 "I require foo but it's not installed.  Aborting."; exit 1;  

}

OR 
$ type foo >/dev/null 2>&1 || { 

  echo >&2 "I require foo but it's not installed.  Aborting."; exit 1;  

}

OR 
$ hash foo 2>/dev/null || { 

  echo >&2 "I require foo but it's not installed.  Aborting."; exit 1;  

}