The constructor for the Zend_Console_Getopt class takes
from one to three arguments. The first argument
declares which options are supported by your application.
This class supports alternative syntax forms for declaring the options.
See the sections below for the format and usage of these syntax forms.
The constructor takes two more arguments, both of which are optional.
The second argument may contain the command-line arguments.
This defaults to $_SERVER['argv'].
The third argument of the constructor may contain an
configuration options to customize the behavior of
Zend_Console_Getopt.
See Adding Configuration
for reference on the options available.
Zend_Console_Getopt supports a compact syntax similar
to that used by GNU Getopt (see
http://www.gnu.org/software/libc/manual/html_node/Getopt.html.
This syntax supports only single-character flags. In a single
string, you type each of the letters that correspond to flags
supported by your application. A letter followed by a colon
character (":") indicates a flag that requires a
parameter.
例 6.1. Using the Short Syntax
<?php
require_once 'Zend/Console/Getopt.php';
$opts = new Zend_Console_Getopt('abp:');
?>
The example above shows using Zend_Console_Getopt
to declare that options may be given as "-a",
"-b", or "-p". The latter flag
requires a parameter.
The short syntax is limited to flags of a single character. Aliases, parameter types, and help strings are not supported in the short syntax.
A different syntax with more features is also available. This syntax allows you to specify aliases for flags, types of option parameters, and also help strings to describe usage to the user. Instead of the single string used in the short syntax to declare the options, the long syntax uses an associative array as the first argument to the constructor.
The key of each element of the associative array is a string with
a format that names the flag, with any aliases, separated by the
pipe symbol ("|"). Following this series of flag
aliases, if the option requires a parameter, is an equals symbol
("=") with a letter that stands for the
type of the parameter:
"=s" for a string parameter
"=w" for a word parameter
(a string containing no whitespace)
"=i" for an integer parameter
If the parameter is optional, use a dash ("-")
instead of the equals symbol.
The value of each element in the associative array is a help string to describe to a user how to use your program.
例 6.2. Using the Long Syntax
<?php
require_once 'Zend/Console/Getopt.php';
$opts = new Zend_Console_Getopt(
array(
'apple|a' => 'This option chooses apple, with no parameter',
'banana|b=i' => 'This option chooses banana, with required integer parameter',
'pear|p-s' => 'This option chooses pear, with optional string parameter'
)
);
?>
In the example declaration above, there are three options.
"--apple" and "-a" are aliases for each
other, and the option takes no parameter.
"--banana" and "-b" are aliases for each
other, and the option takes a mandatory integer parameter.
Finally, "--pear" and "-p" are aliases
for each other, and the option may take an optional string parameter.