getopt

(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)

getopt — 从命令行参数列表中获取选项

说明

getopt ( string $short_options , array $long_options = [] , int &$rest_index = null ) : array|false

解析传入脚本的选项。

参数

short_options
该字符串中的每个字符会被当做选项字符，匹配传入脚本的选项以单个连字符 (-) 开头。 比如，一个选项字符串 "x" 识别了一个选项 -x。 只允许 a-z、A-Z 和 0-9。
long_options
选项数组。此数组中的每个元素会被作为选项字符串，匹配了以两个连字符 (--) 传入到脚本的选项。 例如，长选项元素 "opt" 识别了一个选项 --opt。
rest_index
如果传递了 rest_index 参数，那么参数解析停止时的索引，将被赋值给此变量。

short_options 可能包含了以下元素：

  • 单独的字符（不接受值）
  • 后面跟随冒号的字符（此选项需要值）
  • 后面跟随两个冒号的字符（此选项的值可选）
选项的值是字符串后的第一个参数。如果需要一个值，它不介意值之前是否有前置的空格，参见以下内容。

Note: 选项的值不接受空格（" "）作为分隔符。

long_options 数组可能包含了以下元素：

  • 字符串（参数不接受任何值）
  • 后面跟随冒号的字符串（此选项需要值）
  • 后面跟随两个冒号的字符串（此选项的值可选）

Note:

options 和 longopts 的格式几乎是一样的，唯一的不同之处是 longopts 需要是选项的数组（每个元素为一个选项），而 options 需要一个字符串（每个字符是个选项）。

返回值

此函数会返回选项/参数对， 或者在失败时返回 false。

Note:

选项的解析会终止于找到的第一个非选项，之后的任何东西都会被丢弃。

更新日志

版本 说明
7.1.0 添加 rest_index 参数。

范例

Example #1 getopt() 例子：基本用法

<?php
// Script example.php
$rest_index = null;
$opts = getopt('a:b:', [], $rest_index);
$pos_args = array_slice($argv, $rest_index);
var_dump($pos_args); 
shell> php example.php -fvalue -h

以上例程会输出：

array(2) {
  ["f"]=>
  string(5) "value"
  ["h"]=>
  bool(false)
}

Example #2 getopt() 例子：引入长选项

<?php
// Script example.php
$shortopts  = "";
$shortopts .= "f:";  // Required value
$shortopts .= "v::"; // Optional value
$shortopts .= "abc"; // These options do not accept values

$longopts  = array(
    "required:",     // Required value
    "optional::",    // Optional value
    "option",        // No value
    "opt",           // No value
);
$options = getopt($shortopts, $longopts);
var_dump($options);
?> 
shell> php example.php -f "value for f" -v -a --required value --optional="optional value" --option

以上例程会输出：

array(6) {
  ["f"]=>
  string(11) "value for f"
  ["v"]=>
  bool(false)
  ["a"]=>
  bool(false)
  ["required"]=>
  string(5) "value"
  ["optional"]=>
  string(14) "optional value"
  ["option"]=>
  bool(false)
}

Example #3 getopt() 例子：传递同一多个选项

<?php
// Script example.php
$options = getopt("abc");
var_dump($options);
?> 
shell> php example.php -aaac

以上例程会输出：

array(2) {
  ["a"]=>
  array(3) {
    [0]=>
    bool(false)
    [1]=>
    bool(false)
    [2]=>
    bool(false)
  }
  ["c"]=>
  bool(false)
}

Example #4 getopt() 例子：使用 rest_index

<?php
// Script example.php
$optind = null;
$opts = getopt('a:b:', [], $optind);
$pos_args = array_slice($argv, $optind);
var_dump($pos_args); 
shell> php example.php -a 1 -b 2 -- test

以上例程会输出：

array(1) {
  [0]=>
  string(4) "test"
}

参见

User Contributed Notes

gingko at gingko dot ovh 20-May-2021 12:38
Unfortunately, even using Example #4 do not allow to easily detect a bad -x or --xx argument as the last -x or --xx is always "eaten" even if it is bad:

If I use this (Example #4) :
<?php
// Script example.php
$rest_index = null;
$opts = getopt('a:b:', [], $rest_index);
$pos_args = array_slice($argv, $rest_index);
var_dump($pos_args);
?>

shell> php example.php -a 1 -b 2
shell> php example.php -a 1 -b 2 --test
shell> php example.php -a 1 -tb 2

All return the same result (-t and --test not defined) :

array(0) {
}

(last one use combining single letters, making user testing much much more complicated)
taka8aru at gmail dot com 20-Jun-2020 08:40
getopt() simply ignores unnecessary options specified in argv.
Many times, it does not work well to handle errors in command line.

A package PEAR::Console_Getopt can handle this problem, but it requires additonal installation.
GNU getopt(1) does well at shell level.

Following is my extended getopt() can detect unnecessary options:

<?php
function getoptex($sopt, $lopt, &$ind)
{
    global $argv, $argc;

    $sopts = getopt($sopt, $lopt);
    $sopts_cnt = count($sopts); // single-option count based on original sopt

    $asopt = $sopt . implode("", range("a", "z")) . implode("", range("A", "Z")) . implode("", range("0", "9"));
    $asopts = getopt($asopt, $lopt);
    $asopts_cnt = count($asopts); // actual single-option count including all single options even if is not listed as sopt

    $lopt_trim = array();
    foreach ($lopt as $o) {
        $lopt_trim[] = trim($o, ":");
    }
    $alopts_cnt = 0;
    $alopts_flag = true;
    for ($i = 1; $i < $argc; $i++) {
        if ($argv[$i] === "--") { // end of option
            break;
        }
        if (strpos($argv[$i], "--") === 0) { // actual long-option
            $alopts_cnt++;
            $o = substr($argv[$i], 2);
            if (! in_array($o, $lopt_trim)) { // but it is not listed as lopt
                $alopts_flag = false;
            } else {
                if (in_array(($o . ":"), $lopt)) { // if the option requires value
                    $i++; // assume next is the value
                    if ($i >= $argc) { // and the value is missing
                        $alopts_flag = false;
                        break;
                    }
                }
            }
        }
    }

    //var_dump($sopts, $asopts, $lopts, $alopts_cnt, $alopts_flag);
    if ($sopts_cnt != $asopts_cnt || (! $alopts_flag)) {
        return false;
    } else {
        return getopt($sopt, $lopt, $ind);
    }
}
?>
rastyazhenko dot anton at gmail dot com 29-Dec-2019 03:14
$opts = getopt('', $params = ['ogrn:','inn:','kpp::','host:','port:','user:','pass:','path:','pattern:']) + ['kpp' => 0,'port' => 21,'path' => '/','pattern' => '.+\.dbf'];

array_map(function ($param) use ($opts) {
    $matches = [];
    if ((bool)preg_match('/(?<param>[^:\s]+)\b:$/sU', $param, $matches)
        && (!array_key_exists($matches['param'], $opts) || empty($opts[$matches['param']])))
        die(sprintf('<prtg><error>1</error><text>%s not set</text></text></error></prtg>', $matches['param']));
}, $params);
Sane Guy 17-Sep-2018 12:40
Be sure to wrap your head around this PHP jewel that took me a while to comprehend:

The returned array will contain a boolean FALSE for options that HAVE been specified.

Because why use TRUE to indicate "yes, it's there" when you can also use FALSE for that purpose, right? This is completely counter-intuitive and is most certainly only ever possible in PHP-land.
Matt 24-May-2018 03:35
Beware, this function can be dangerous for options following arguments when, for example, you make use of a --dry-run option, due to this behaviour:

"Note: The parsing of options will end at the first non-option found, anything that follows is discarded."

My script was doing a live run even though I specified --dry-run as the last part of the command like this `php foo.php arg1 --dry-run`: getopt() did NOT include dry-run in its list of options resulting in my script executing a live run.
salimzadehsajad at gmail dot com 02-Sep-2017 05:16
if you use command like below
    php [filename] [argument without (-) ] [options]
getopt don't return value. you can use this function

function getoptions() {
    global $argv,$argc;
    $options = array();
    for($i = 0;$i < $argc;$i++) {
        $arg = $argv[$i];
        if(strlen($arg) > 1 && $arg[0] == '-') {
            if($arg[1] == '-' && $i + 1 < $argc) { $i++; $options[substr($arg,2,strlen($arg))] = $argv[$i]; }
            else $options[$arg[1]] = substr($arg,2,strlen($arg));
        }
    }
    return $options;
}
wouter dot berben at phpro dot be 10-Jan-2017 10:37
Your description on getopt is either wrong or the documentation of the function is wrong.

-- snippet --
array getopt ( string $options [, array $longopts [, int &$optind ]] )
--

As I read this only the first parameter string $options is required.

-- snippet --
longopts
An array of options. Each ...

optind
If the optind parameter is present, ...
--

This means that "longopts" is optional, but the third parameter "optind" is required (although the description leaves room for interpretation). This is against the possibilities of PHP because when a parameter is declared optional all following parameters must be declared optional as well.

See http://php.net/manual/en/functions.arguments.php Example #4 and #5.

The immutable embedded stub (PHPStorm) [ https://github.com/JetBrains/phpstorm-stubs/blob/master/standard/standard_3.php ] specifies this:
-- snippet --
function getopt ($options, array $longopts = null, &$optind) {}
--

Which is also wrong, but probably based upon this documentation.
micropresident at gmail dot com 12-Apr-2016 01:21
when using -f option to indicate script name, php does not allow to use double dash -- to define options after the script name;

For example, the following command  cannot be execute:
php -f myscript.php --config "myconfig.ini"
housni dot yakoob at NOSPAM dot gmail dot com 17-Jun-2015 11:14
To elaborate on what 'ch1902' said, there certainly are instances where you may need to execute a script via CLI and the HTTP protocol. In such an instance, you can normalize how your script parses via CLI (using getopt()) as well as via HTTP (using $_GET) with the following simplified code:

<?php
// PHP 5.4+ only due to the new array brace style.
function request(array $options = []) {
    // Set the default values.
    $defaults = [
        'params' => '',
        'os' => '',
        'username' => posix_getpwuid(posix_geteuid())['name'],
        'env' => ''
    ];
    $options += $defaults;

    // Sufficient enough check for CLI.
    if ('cli' === PHP_SAPI) {
        return getopt('', ['params:', 'os::', 'username::', 'env::']) + $options;
    }
    return $_GET + $options;
}

print_r(request());
?>

The above code would yield the results below when access via CLI and HTTP.

/**
 * params = foo/bar
 * username = housni.yakoob
 */
// CLI
$ php script.php --params=foo/bar --username=housni.yakoob
Array
(
    [params] => foo/bar
    [username] => housni.yakoob
    [os] =>
    [env] =>
)

// HTTP
script.php?params=foo/bar&username=housni.yakoob
Array
(
    [params] => foo/bar
    [username] => housni.yakoob
    [os] =>
    [env] =>
)

/**
 * params = foo/bar
 * username = Not provided, therefore, the default value will be used.
 */
// CLI
$ whoami && php script.php --params=foo/bar
housni // <-- Current users usersname (output of `whoami`).
Array
(
    [params] => foo/bar
    [os] =>
    [username] => housni
    [env] =>
)

// HTTP
script.php?params=foo/bar
Array
(
    [params] => foo/bar
    [os] =>
    // The username of my Apache user, the result of posix_getpwuid(posix_geteuid())['name']
    [username] => www-data
    [env] =>
)

As you can see, the output is consistent when the script is executed via the CLI or the web.
takingsides at gmail dot com 09-Mar-2014 03:16
As already mentioned getopt() will stop parsing options upon the '--'.  Sometimes you will have options and arguments but the user may not always provide the explicit -- option.

Below is a quick way to collect options and arguments regardless of the -- consistently.

#!/usr/bin/php
<?php

$options = getopt('hl::m:v:a', [
    'help',
    'list::',
    'module:',
    'version:',
    'all',
]);

var_dump( $options );

$args = array_search('--', $argv);
$args = array_splice($argv, $args ? ++$args : (count($argv) - count($opt)));

var_dump( $args );
?>
ch1902 18-Aug-2013 03:37
Sometimes you will want to run a script from both the command line and as a web page, for example to debug with better output or a command line version that writes an image to the system but a web version that prints the image in the browser. You can use this function to get the same options whether passed as command line arguments or as $_REQUEST values.

<?php
/**
 * Get options from the command line or web request
 *
 * @param string $options
 * @param array $longopts
 * @return array
 */
function getoptreq ($options, $longopts)
{
   if (PHP_SAPI === 'cli' || empty($_SERVER['REMOTE_ADDR']))  // command line
   {
      return getopt($options, $longopts);
   }
   else if (isset($_REQUEST))  // web script
   {
      $found = array();

      $shortopts = preg_split('@([a-z0-9][:]{0,2})@i', $options, 0, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
      $opts = array_merge($shortopts, $longopts);

      foreach ($opts as $opt)
      {
         if (substr($opt, -2) === '::')  // optional
         {
            $key = substr($opt, 0, -2);

            if (isset($_REQUEST[$key]) && !empty($_REQUEST[$key]))
               $found[$key] = $_REQUEST[$key];
            else if (isset($_REQUEST[$key]))
               $found[$key] = false;
         }
         else if (substr($opt, -1) === ':')  // required value
         {
            $key = substr($opt, 0, -1);

            if (isset($_REQUEST[$key]) && !empty($_REQUEST[$key]))
               $found[$key] = $_REQUEST[$key];
         }
         else if (ctype_alnum($opt))  // no value
         {
            if (isset($_REQUEST[$opt]))
               $found[$opt] = false;
         }
      }

      return $found;
   }

   return false;
}
?>

Example

<?php
// php script.php -a -c=XXX -e=YYY -f --two --four=ZZZ --five=5
// script.php?a&c=XXX&e=YYY&f&two&four=ZZZ&five=5

$opts = getoptreq('abc:d:e::f::', array('one', 'two', 'three:', 'four:', 'five::'));

var_dump($opts);

/**
array(7) {
  'a' => bool(false)
  'c' => string(3) "XXX"
  'e' => string(3) "YYY"
  'f' => bool(false)
  'two' => bool(false)
  'four' => string(3) "ZZZ"
  'five' => string(1) "5"
}
*/
?>
Anonymous 02-Feb-2011 04:33
getopt() only returns the options specified if they were listed in the options.

So you cant make a switch() use default: to complain of an unknown option. :(
mpartap at gmx dot net 24-Oct-2010 01:39
Here's another way of removing options found by getopt() from the argv[] array. It handles the different kind of parameters without eating chunks that do not belong to an --option. (-nr foo param1 param2 foo)
<?php
$parameters = array(
  'n' => 'noparam',
  'r:' => 'required:',
  'o::' => 'optional::',
);

$options = getopt(implode('', array_keys($parameters)), $parameters);
$pruneargv = array();
foreach ($options as $option => $value) {
  foreach ($argv as $key => $chunk) {
    $regex = '/^'. (isset($option[1]) ? '--' : '-') . $option . '/';
    if ($chunk == $value && $argv[$key-1][0] == '-' || preg_match($regex, $chunk)) {
      array_push($pruneargv, $key);
    }
  }
}
while ($key = array_pop($pruneargv)) unset($argv[$key]);
?>
geoff at gosquared dot com 08-May-2010 05:05
It seems under PHP 5.3.2, getopt() makes a script fail to load if called via HTTP without any conditions. You'll need something like if(isset($_SERVER['argc'])) $args = getopt(); to prevent that.
mbirth at webwriters dot de 24-May-2008 01:41
After getopt() of PHP5.3.0 (on Windows) ignored some parameters if there was a syntactical problem, I decided to code my own generic parameter parser.

<?php
    /**
     * Parses $GLOBALS['argv'] for parameters and assigns them to an array.
     *
     * Supports:
     * -e
     * -e <value>
     * --long-param
     * --long-param=<value>
     * --long-param <value>
     * <value>
     *
     * @param array $noopt List of parameters without values
     */
    function parseParameters($noopt = array()) {
        $result = array();
        $params = $GLOBALS['argv'];
        // could use getopt() here (since PHP 5.3.0), but it doesn't work relyingly
        reset($params);
        while (list($tmp, $p) = each($params)) {
            if ($p{0} == '-') {
                $pname = substr($p, 1);
                $value = true;
                if ($pname{0} == '-') {
                    // long-opt (--<param>)
                    $pname = substr($pname, 1);
                    if (strpos($p, '=') !== false) {
                        // value specified inline (--<param>=<value>)
                        list($pname, $value) = explode('=', substr($p, 2), 2);
                    }
                }
                // check if next parameter is a descriptor or a value
                $nextparm = current($params);
                if (!in_array($pname, $noopt) && $value === true && $nextparm !== false && $nextparm{0} != '-') list($tmp, $value) = each($params);
                $result[$pname] = $value;
            } else {
                // param doesn't belong to any option
                $result[] = $p;
            }
        }
        return $result;
    }
?>

A call like: php.exe -f test.php -- alfons -a 1 -b2 -c --d 2 --e=3=4 --f "alber t" hans wurst

and an in-program call parseParameters(array('f')); would yield in a resulting array:

Array
(
    [0] => alfons
    [a] => 1
    [b2] => 1
    [c] => 1
    [d] => 2
    [e] => 3=4
    [f] => 1
    [1] => alber t
    [2] => hans
    [3] => wurst
)

As you can see, values without an identifier are stored with numeric indexes. Existing identifiers without values get "true".
uberlinuxguy at tulg dot org 25-Apr-2008 01:26
One thing of important note would be that getopt() actually respects the '--' option to end an option list.  Thus given the code:

test.php:
<?php
    $options = getopt("m:g:h:");
    if (!is_array($options) ) {
        print "There was a problem reading in the options.\n\n";
        exit(1);
    }
    $errors = array();
    print_r($options);
?>

And running:

# ./test.php ./run_vfs  -h test1 -g test2 -m test3 -- this is a test -m green

Will return:

Array
(
    [h] => test1
    [g] => test2
    [m] => test3
)

Whereas running:
# /test.php ./run_vfs  -h test1 -g test2 -m test3 this is a test -m green

Will return:

Array
(
    [h] => test1
    [g] => test2
    [m] => Array
        (
            [0] => test3
            [1] => green
        )

)
Francois Hill 19-Nov-2007 12:44
Although very interesting, koenbollen at gnospamail dot com's update of the argv array fails when option values follow the option with no space :
Indeed
    php MyScript.php5 -t5
and
    php MyScript.php5 -t 5
with $options="t:" are treated as the same by getopt.

This upgraded function should take care of it :

File : shift_test.php5
<?php
    function shift($options_array)
    {
        foreach( $options_array as $o => $a )
        {
            // Look for all occurrences of option in argv and remove if found :
            // ----------------------------------------------------------------
            // Look for occurrences of -o (simple option with no value) or -o<val> (no space in between):
            while($k=array_search("-".$o.$a,$GLOBALS['argv']))
            {    // If found remove from argv:
                if($k)
                    unset($GLOBALS['argv'][$k]);
            }
            // Look for remaining occurrences of -o <val> (space in between):
            while($k=array_search("-".$o,$GLOBALS['argv']))
            {    // If found remove both option and value from argv:
                if($k)
                {    unset($GLOBALS['argv'][$k]);
                    unset($GLOBALS['argv'][$k+1]);
                }
            }
        }
        // Reindex :
        $GLOBALS['argv']=array_merge($GLOBALS['argv']);
    }

    print_r($argv);
    $options_array=getopt('t:h');
    shift($options_array);
    print_r($argv);
?>

>php shift_test.php5 -h -t4 param1 param2
will ouptut :
Array
(
    [0] => test.php5
    [1] => -h
    [2] => -t4
    [3] => param1
    [4] => param2
)
Array
(
    [0] => test.php5
    [1] => param1
    [2] => param2
)

>php shift_test.php5 -h -t 4 param1 param2
will ouptut :
Array
(
    [0] => test.php5
    [1] => -h
    [2] => -t
    [3] => 4
    [4] => param1
    [5] => param2
)
Array
(
    [0] => test.php5
    [1] => param1
    [2] => param2
)
Damien B. 07-Nov-2007 10:47
This is how I handle arguments with getopt: I use switch within a foreach at the beginning of a program.

<?php

$opts = getopt('hs:');

// Handle command line arguments
foreach (array_keys($opts) as $opt) switch ($opt) {
  case 's':
    // Do something with s parameter
    $something = $opts['s'];
    break;

  case 'h':
    print_help_message();
    exit(1);
}

print "$something\n";

?>
koenbollen at gnospamail dot com 29-Mar-2007 12:51
After you use the getopt function you can use the following script to update the $argv array:
<?php
  $options = "c:ho:s:t:uvV";
  $opts = getopt( $options );
  foreach( $opts as $o => $a )
  {
    while( $k = array_search( "-" . $o, $argv ) )
    {
      if( $k )
        unset( $argv[$k] );
      if( preg_match( "/^.*".$o.":.*$/i", $options ) )
        unset( $argv[$k+1] );
    }
  }
  $argv = array_merge( $argv );
?>
Note: I used the array_merge function to reindex the array's keys.

Cheers, Koen Bollen
17-Jan-2007 11:59
About getopt(String):
 Parses the command-line arguments into an associative array, using the function's String parameter to specify arguments and options, thus:
* arguments are specified as any letter followed by a colon, e.g. "h:".
* arguments are returned as "h" => "value".
* options are specified as any letter not followed by a colon, e.g. "r".
* options are returned as "r" => (boolean) false.

Also note that:
1) Options or arguments not passed in the command-line parameters are not set in the returned associative array.
2) Options or arguments present in the command-line arguments multiple times are returned as an enumerated array within the returned associative array.
joey at alegria dot co dot jp 30-Apr-2006 09:57
There are 2 simpler (and much faster) methods for getting good getopt() operation without creating your own handler.

1. Use the Console_Getopt PEAR class (should be standard in most PHP installations) which lets you specify both short and long form options as well as whether or not arguments supplied to an option are themselves 'optional'. Very simple to use and requires very little code to operate compaired to writing own handler.

2. If you cannot load external PEAR objects, use your shell's getopt() functions (which in BASHs case work very well) to process options and have your shell script then call your PHP script with a rigid argument structure that is very easy for PHP to digest such as:
% myfile.php -a TRUE -b FALSE -c ARGUMENT ...
If the initial arguments are invalid you can have the shell script return an error without calling the PHP script. Sounds convoluted but is a very simple solution and in fact PHP's own % pear command uses this method. /usr/bin/pear is a shell script that does some simle checking before calling pearcmd.php and repassing the arguments on to it.

The second method is by far the best for portability because it allows a single shell script to check a few things like your PHP version and respond acordingly e.g. does it call your PHP4 or PHP5 compatible script? Also, because getopt() is not available on Windows, The second solution allows you to do Windows specific testing as a BAT file (as oposed to BASH, ZSH or Korn on UNIX).
chris at tiny dot net 23-Apr-2004 07:17
"phpnotes at kipu dot co dot uk" and "tim at digicol dot de" are both wrong or misleading.  Sean was correct.  Quoted space-containing strings on the command line are one argument.  It has to do with how the shell handles the command line, more than PHP.  PHP's getopt() is modeled on and probably built upon the Unix/POSIX/C library getopt(3) which treats strings as strings, and does not break them apart on white space.

Here's proof:

$ cat opt.php
#! /usr/local/bin/php
<?php
$options = getopt("f:");
print_r($options);
?>
$ opt.php -f a b c
Array
(
    [f] => a
)
$ opt.php -f 'a b c'
Array
(
    [f] => a b c
)
$ opt.php -f "a b c"
Array
(
    [f] => a b c
)
$ opt.php -f a\ b\ c
Array
(
    [f] => a b c
)
$