Composer dependency constraint

Question

Is there a possibility to let composer install a package only when the PHP version is below a given version.

https://github.com/ircmaxell/password_compat

"ircmaxell/password-compat": "dev-master"

I have found this package to be useful because I have a webserver which runs on PHP 5.4 and I need the password_* functions which are only available >= PHP 5.5.

Elias Van Ootegem · Accepted Answer · 2014-07-11 10:27:21Z

1

Yes, there is. You can find the details on the packagist website, but basically, the package/dependency should be defined with this requirement:

{
    "name": "ircmaxell/password-compat",
    "description": "A compatibility library for the proposed simplified password hashing algorithm: https://wiki.php.net/rfc/password_hash",
    "require": {
        "php": "<5.5.*",
        "phpunit/phpunit": "4.*"
    }
}

As you can see, I've added "php": "<5.5.*" to the requirements for the package. You can add this requirement to your own composer.json file, by adding the dependency to your repositories array in the composer.json file, and add the requirements there:

{
    "repositories": [
    {
        "type": "vcs",
        "url": "https://github.com/ircmaxell/password_compat",
        "require": {
            "php": "<5.5.*",
        }
    }]
}

Something like that, I only have php5.5 installed, so I was unable to test this, though... but read through the documentation, I'm pretty sure it's possible.

answered Jul 11, 2014 at 10:27

Elias Van Ootegem

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2 Comments

stixx Over a year ago

@Ellias Van Ootegem Shouldn't the requirement for this package be: php: <=5.5?

Elias Van Ootegem Over a year ago

@stixx: You're right, except then that it should be "php": "<5.5.*", as 5.5 is fine

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