PHP uses getopt () to parse CLI parameters

The PHP manual getopt () is described below:

/**

* Gets options from the command line argument list

* @link http://php.net/manual/en/function.getopt.php

* @param string $options Each character in this string would be used as option characters and

* Matched against options passed to the script starting with a single

* HYPHEN (-).

* For example, a option string "X" recognizes an

* Option-x.

* Only A-Z, A-Z and 0-9 are allowed.

* @param array $longopts [optional] An array of options. Each element in this array would be used as option

* Strings and matched against options passed to the script starting with

* Hyphens (-).

* For example, a longopts element "opt" recognizes an

* Option--opt.

* Prior to PHP5.3.0 This parameter is only available on few systems

* @param int $optind If The Optind parameter is present and then the index where argument parsing stopped would be written to This variable.

* @return Array This function would return an array of option/argument pairs or false on

* failure.

* @since 4.3.0

* @since 5.0

*/

function getopt ($options, array $longopts = NULL, & $optind = null) {}

$options : String type, where each character is treated as an option character, and the option to match the incoming script begins with a single hyphen (-). For example, an option string "X" recognizes an option-X. Only A-Z, A-Z, and 0-9 are allowed.

Character arguments can be followed by:

1. There is no colon (for example:h): No value is required and is provided and not read to determine if this parameter is set.
2. There is a colon (for example:P:): You need to supply value and do not read this parameter without providing value. There are several ways to set values:-P 123,–p123,-p=123.
3. There are two colons (for example:F::): value is optional, there is no setting value to read (value is false when not set), value needs to be appended to the parameter and cannot be separated by a space. There are several ways to set the value:-f=123,-f123.

$longopts : array type, each element in this array is used as an option string, matching the option to pass in a script with two hyphens (--). For example, the long option element "opt" identifies an option--opt.

The format of $options and $longopts is almost the same, except that $longopts need to be an array of options (each element is an option), and $options A string is required (each character is an option).

PHP uses getopt () to parse CLI parameters