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# System::which

System::which -- show full path of a command

## Synopsis

    require_once "System.php";

``mixed System::which` (string $program [, boolean $fallback = `FALSE`])`

## Description

The command shows the full path of a command.

## Parameter

- `string $program` - the command to search for

- `boolean $fallback` - value to return in case of program not found

## Return value

`mixed` - A string with the full path or `FALSE` if not found

## Note

This function can be called statically.

## See

which man page

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