Composer can not install on PHP 5.5.x (tested 5.5.13)

[joshua-graham-adelphi]

Drupal 8 supports PHP version 5.5.9+ so not sure why failing. error seems cryptic.

Output:
`joshua.graham@JoshG-PC MSYS /c/temp
$ php -v
PHP 5.5.38 (cli) (built: Jul 20 2016 11:16:06)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies
with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies

joshua.graham@JoshG-PC MSYS /c/temp
$ composer create-project drupal-composer/drupal-project:8.x-dev build --stability dev --no-interaction
1/3: http://packagist.org/p/provider-latest$43a2f7fafbde6ad0f0dbae48d700fbd8e8335fcad7743483f204bd035b3c1141.json
2/3: http://packagist.org/p/provider-2018-01$d946b6b2a4543c7090e787add01e13141e21835faa302c4ddeaf7b31d2075286.json
3/3: http://packagist.org/p/provider-2018-04$d90f1bb6b051f4a025a0fa4c72b091331255cb98884c3c69a58434a218852a82.json
Finished: success: 3, skipped: 0, failure: 0, total: 3
Installing drupal-composer/drupal-project (8.x-dev 04138e3)

• Installing drupal-composer/drupal-project (8.x-dev 04138e3): Cloning 04138e3 from cache
  Created project in build
  1/1: http://packagist.org/p/provider-latest$52a779c1040bbb4c55042040582cf72c79bfe8b62b7cc4a04cee176a87e9906f.json
  Finished: success: 1, skipped: 0, failure: 0, total: 1

DrupalProject\composer\ScriptHandler::checkComposerVersion
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Conclusion: don't install drupal/core 8.5.4
- Conclusion: don't install drupal/core 8.5.3
- Conclusion: don't install symfony/dependency-injection v3.4.11
- Conclusion: don't install symfony/config v2.8.41
- Conclusion: don't install symfony/dependency-injection v3.4.7|install symfony/config v2.8.41
- Conclusion: don't install symfony/dependency-injection v3.4.8|install symfony/config v2.8.41
- Conclusion: don't install symfony/dependency-injection v3.4.9|install symfony/config v2.8.41
- Conclusion: don't install symfony/dependency-injection v3.4.10|install symfony/config v2.8.41
- Conclusion: don't install symfony/dependency-injection v3.4.6
- Conclusion: don't install symfony/dependency-injection 3.4.x-dev
- Conclusion: don't install symfony/dependency-injection v3.4.4
- Conclusion: don't install symfony/dependency-injection v3.4.3
- Conclusion: don't install symfony/config v2.8.40
- Conclusion: don't install symfony/dependency-injection v3.4.5|install symfony/config v2.8.40|install symfony/config v2.8.41
- Conclusion: don't install symfony/dependency-injection v3.4.2
- Conclusion: don't install symfony/dependency-injection v3.4.1
- Conclusion: don't install symfony/config v2.8.39
- Conclusion: don't install symfony/dependency-injection v3.4.0
- Conclusion: don't install symfony/config v2.8.37|install symfony/dependency-injection v3.4.0|install symfony/dependency-injection v3.4.1|install symfony/dependency-injection v3.4.2|install symfony/dependency-injection v3.4.3|install symfony/dependency-injection v3.4.4|install symfony/dependency-injection v3.4.5
- Conclusion: don't install symfony/config v2.8.38
- Conclusion: don't install symfony/dependency-injection v3.4.0-BETA3|install symfony/config v2.8.38
- Conclusion: don't install symfony/dependency-injection v3.4.0-RC2|install symfony/config v2.8.37|install symfony/config v2.8.38|install symfony/config v2.8.39|install symfony/config v2.8.40|install symfony/config v2.8.41
- Conclusion: don't install symfony/dependency-injection v3.4.0-RC1|install symfony/config v2.8.37|install symfony/config v2.8.38|install symfony/config v2.8.39|install symfony/config v2.8.40|install symfony/config v2.8.41
- Conclusion: don't install symfony/dependency-injection v3.4.0-BETA4
- Conclusion: don't install symfony/config v2.8.36|install symfony/dependency-injection v3.4.0-BETA3|install symfony/dependency-injection v3.4.0-BETA4|install symfony/dependency-injection v3.4.0-RC1|install symfony/dependency-injection v3.4.0-RC2
- Installation request for drupal/core ~8.5.3 -> satisfiable by drupal/core[8.5.3, 8.5.4, 8.5.x-dev].
- Installation request for drush/drush ^9.0.0 -> satisfiable by drush/drush[9.0.0, 9.0.0-alpha1, 9.0.0-beta1, 9.0.0-beta2, 9.0.0-beta3, 9.0.0-beta4, 9.0.0-beta5, 9.0.0-beta6, 9.0.0-beta7, 9.0.0-beta8, 9.0.0-beta9, 9.0.0-rc1, 9.0.0-rc2, 9.1.0, 9.2.0, 9.2.1, 9.2.2, 9.2.3, 9.3.0, 9.x-dev].
- drupal/core 8.5.x-dev requires symfony/dependency-injection ~3.4.0 -> satisfiable by symfony/dependency-injection[3.4.x-dev, v3.4.0, v3.4.0-BETA1, v3.4.0-BETA2, v3.4.0-BETA3, v3.4.0-BETA4, v3.4.0-RC1, v3.4.0-RC2, v3.4.1, v3.4.10, v3.4.11, v3.4.2, v3.4.3, v3.4.4, v3.4.5, v3.4.6, v3.4.7, v3.4.8, v3.4.9].
- Conclusion: don't install symfony/dependency-injection v3.4.0-BETA1
- symfony/dependency-injection v3.4.0-BETA2 conflicts with symfony/config[v2.8.35].
- Conclusion: don't install symfony/dependency-injection v3.4.0-BETA2|install symfony/config v2.8.35|install symfony/config v2.8.36|install symfony/config v2.8.37|install symfony/config v2.8.38|install symfony/config v2.8.39|install symfony/config v2.8.40|install symfony/config v2.8.41

joshua.graham@JoshG-PC MSYS /c/temp
$
`

[webflo]

Please check your php-extensions with "composer check-platform-reqs". Clone the git repo and run "composer check-platform-reqs" in the cloned directory.

[webflo]

Related to #338

[joshua-graham-adelphi]

Coming back to this issue...

"composer check-platform-reqs" appears to not give any output. Doesn't appear to be same issue linked.

Commandline

joshua.graham@JoshG-PC MSYS /c/Projects $ cd /c/temp

joshua.graham@JoshG-PC MSYS /c/temp
$ mkdir drupal-composerphp5

joshua.graham@JoshG-PC MSYS /c/temp
$ git clone git@github.com:drupal-composer/drupal-project.git drupal-composerphp5
Cloning into 'drupal-composerphp5'...
remote: Counting objects: 975, done.
remote: Compressing objects: 100% (11/11), done.
remote: Total 975 (delta 4), reused 14 (delta 4), pack-reused 959
Receiving objects: 100% (975/975), 253.95 KiB | 252.00 KiB/s, done.
Resolving deltas: 100% (435/435), done.

joshua.graham@JoshG-PC MSYS /c/temp
$ cd drupal-composerphp5/

joshua.graham@JoshG-PC MSYS /c/temp/drupal-composerphp5 (8.x)
$ php -v
PHP 5.5.38 (cli) (built: Jul 20 2016 11:16:06)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies
with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2015, by Zend Technologies

joshua.graham@JoshG-PC MSYS /c/temp/drupal-composerphp5 (8.x)
$ composer check-platform-reqs

joshua.graham@JoshG-PC MSYS /c/temp/drupal-composerphp5 (8.x)
$ composer install
1/9: https://packages.drupal.org/8/drupal/provider-2017-2$601dfcfc2e6b5e0bd3d8ec264c5f05f12805f7e53feb2ba495603f8db9ea8761.json
2/9: https://packages.drupal.org/8/drupal/provider-2018-2$917354a7c97ae1785592da1bb86561bb5f4c674ba45312912577e73de248d928.json
3/9: https://packages.drupal.org/8/drupal/provider-2017-4$d2397a6675ba2bff38ce5f04f84cb22c62227ac6bf398476d68ba6e1a7232ae5.json
4/9: https://packages.drupal.org/8/drupal/provider-2015-3$84d8c556a8f01336dc4264cc4557466a11c808d237ef9e8d427befa16f1af84d.json
5/9: https://packages.drupal.org/8/drupal/provider-2016-2$af04b1ed153ab3c869a90878768e59ae62532349f2ec751cabdc5379f17b32d3.json
6/9: https://packages.drupal.org/8/drupal/provider-2017-1$d3a86a9d564e7fa5facc74973819fbcf362748555775563b3c504ce9fbb9d53f.json
7/9: https://packages.drupal.org/8/drupal/provider-2016-3$6adb2f66db28383a504de4ce9ee491cadaad6a7fe2d672807c51ca6d2c0080e7.json
8/9: https://packages.drupal.org/8/drupal/provider-2017-3$1af840ea1c99c54339b8d14a72613d2af8a55c1148e1b65cd21a12d58a17ace6.json
9/9: https://packages.drupal.org/8/drupal/provider-2018-1$a59db387a7a796357f89f944d8c5150718b84c15c2eb767f646e88bfba9e383e.json
Finished: success: 9, skipped: 0, failure: 0, total: 9
1/11: http://packagist.org/p/provider-2018-07$cf8e95b7e87569d5ed1b197fa22a96df422ee5e0b527dbc89d6bd6508d890ce7.json
2/11: http://packagist.org/p/provider-archived$216205c00b7bfcb4d972a5a24f4aa8124a2f92a8135a4a00b794dbc35e4a56e6.json
3/11: http://packagist.org/p/provider-latest$e5103f260b5a312816724681f943d19477e119883e4f251ac930d9eddee29f62.json
4/11: http://packagist.org/p/provider-2013$498f1c8be86f3118f4725d6546c25e95c0e7d5441115f29ba97e728c4a36edee.json
5/11: http://packagist.org/p/provider-2018-01$2607e01f8cfab4cd6993048497b4a71f5c86ea411ede1c96079f72a8a5f48576.json
6/11: http://packagist.org/p/provider-2018-04$8b3fae9d469756c8d28fadc635aff98e741f42cc03b1010d95a5dcb1680fb8ff.json
7/11: http://packagist.org/p/provider-2014$f03d4875dae9bae9715a6dbf2696aafd6ff3deb10807f1ad66927d1a4a5b839f.json
8/11: http://packagist.org/p/provider-2017-10$b951e93200f036174349ec2fa8b2f2378e8b78c70f20486ef375ce34ac249903.json
9/11: http://packagist.org/p/provider-2015$f00435bafef1e2643ebd1c6a3208b8af3d17048df0857b527754a5073a726d84.json
10/11: http://packagist.org/p/provider-2016$da7ccee228205bda8f26d8943283178802bd6e685ae646c9f4a1e5c1078b3d60.json
11/11: http://packagist.org/p/provider-2017$739e2102e4c3d91675a11a825d133f91ee2a76b7e367bd977d290bc422ac0f0c.json
Finished: success: 11, skipped: 0, failure: 0, total: 11

DrupalProject\composer\ScriptHandler::checkComposerVersion
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Conclusion: don't install symfony/dependency-injection v3.4.12
- Conclusion: don't install drupal/core 8.5.5
- Conclusion: don't install drupal/core 8.5.4
- Conclusion: don't install drupal/core 8.5.3
- Conclusion: don't install symfony/config v2.8.42|don't install drupal/core 8.5.x-dev
- Conclusion: don't install symfony/dependency-injection v3.4.5|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.7|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.9|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.10|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.11|install symfony/config v2.8.42
- Conclusion: don't install symfony/config v2.8.41|don't install drupal/core 8.5.x-dev|install symfony/dependency-injection v3.4.10|install symfony/dependency-injection v3.4.11|install symfony/dependency-injection v3.4.5|install symfony/dependency-injection v3.4.7|install symfony/dependency-injection v3.4.9
- Conclusion: don't install symfony/dependency-injection v3.4.4|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.3|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.6|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.8|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/config v2.8.40|don't install drupal/core 8.5.x-dev|install symfony/dependency-injection v3.4.10|install symfony/dependency-injection v3.4.11|install symfony/dependency-injection v3.4.3|install symfony/dependency-injection v3.4.4|install symfony/dependency-injection v3.4.5|install symfony/dependency-injection v3.4.6|install symfony/dependency-injection v3.4.7|install symfony/dependency-injection v3.4.8|install symfony/dependency-injection v3.4.9
- Conclusion: don't install symfony/dependency-injection v3.4.2|install symfony/config v2.8.40|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.0-RC2|install symfony/config v2.8.40|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.1|install symfony/config v2.8.40|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/config v2.8.39|don't install drupal/core 8.5.x-dev|install symfony/dependency-injection v3.4.0-RC2|install symfony/dependency-injection v3.4.1|install symfony/dependency-injection v3.4.10|install symfony/dependency-injection v3.4.11|install symfony/dependency-injection v3.4.2|install symfony/dependency-injection v3.4.3|install symfony/dependency-injection v3.4.4|install symfony/dependency-injection v3.4.5|install symfony/dependency-injection v3.4.6|install symfony/dependency-injection v3.4.7|install symfony/dependency-injection v3.4.8|install symfony/dependency-injection v3.4.9
- Conclusion: don't install symfony/dependency-injection 3.4.x-dev|install symfony/config v2.8.39|install symfony/config v2.8.40|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.0|install symfony/config v2.8.39|install symfony/config v2.8.40|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/config v2.8.38
- Conclusion: don't install symfony/dependency-injection v3.4.0-RC1|install symfony/config v2.8.38|install symfony/config v2.8.39|install symfony/config v2.8.40|install symfony/config v2.8.41|install symfony/config v2.8.42
- Installation request for drupal/core ~8.5.3 -> satisfiable by drupal/core[8.5.3, 8.5.4, 8.5.5, 8.5.x-dev].
- Conclusion: don't install symfony/dependency-injection v3.4.0-BETA4
- Conclusion: don't install symfony/config v2.8.36|don't install drupal/core 8.5.x-dev|install symfony/dependency-injection 3.4.x-dev|install symfony/dependency-injection v3.4.0|install symfony/dependency-injection v3.4.0-BETA4|install symfony/dependency-injection v3.4.0-RC1|install symfony/dependency-injection v3.4.0-RC2|install symfony/dependency-injection v3.4.1|install symfony/dependency-injection v3.4.10|install symfony/dependency-injection v3.4.11|install symfony/dependency-injection v3.4.2|install symfony/dependency-injection v3.4.3|install symfony/dependency-injection v3.4.4|install symfony/dependency-injection v3.4.5|install symfony/dependency-injection v3.4.6|install symfony/dependency-injection v3.4.7|install symfony/dependency-injection v3.4.8|install symfony/dependency-injection v3.4.9
- Conclusion: don't install symfony/config v2.8.37|don't install drupal/core 8.5.x-dev|install symfony/dependency-injection 3.4.x-dev|install symfony/dependency-injection v3.4.0|install symfony/dependency-injection v3.4.0-BETA4|install symfony/dependency-injection v3.4.0-RC1|install symfony/dependency-injection v3.4.0-RC2|install symfony/dependency-injection v3.4.1|install symfony/dependency-injection v3.4.10|install symfony/dependency-injection v3.4.11|install symfony/dependency-injection v3.4.2|install symfony/dependency-injection v3.4.3|install symfony/dependency-injection v3.4.4|install symfony/dependency-injection v3.4.5|install symfony/dependency-injection v3.4.6|install symfony/dependency-injection v3.4.7|install symfony/dependency-injection v3.4.8|install symfony/dependency-injection v3.4.9
- Conclusion: don't install symfony/dependency-injection v3.4.0-BETA3|install symfony/config v2.8.36|install symfony/config v2.8.37|install symfony/config v2.8.38|install symfony/config v2.8.39|install symfony/config v2.8.40|install symfony/config v2.8.41|install symfony/config v2.8.42
- Installation request for drush/drush ^9.0.0 -> satisfiable by drush/drush[9.0.0, 9.0.0-alpha1, 9.0.0-beta1, 9.0.0-beta2, 9.0.0-beta3, 9.0.0-beta4, 9.0.0-beta5, 9.0.0-beta6, 9.0.0-beta7, 9.0.0-beta8, 9.0.0-beta9, 9.0.0-rc1, 9.0.0-rc2, 9.1.0, 9.2.0, 9.2.1, 9.2.2, 9.2.3, 9.3.0, 9.x-dev].
- symfony/dependency-injection v3.4.0-BETA1 conflicts with symfony/config[v2.8.30].
- symfony/dependency-injection v3.4.0-BETA1 conflicts with symfony/config[v2.8.31].
- symfony/dependency-injection v3.4.0-BETA1 conflicts with symfony/config[v2.8.32].
- symfony/dependency-injection v3.4.0-BETA1 conflicts with symfony/config[v2.8.33].
- symfony/dependency-injection v3.4.0-BETA1 conflicts with symfony/config[v2.8.34].
- symfony/dependency-injection v3.4.0-BETA1 conflicts with symfony/config[v2.8.35].
- drupal/core 8.5.x-dev requires symfony/dependency-injection ~3.4.0 -> satisfiable by symfony/dependency-injection[3.4.x-dev, v3.4.0, v3.4.0-BETA1, v3.4.0-BETA2, v3.4.0-BETA3, v3.4.0-BETA4, v3.4.0-RC1, v3.4.0-RC2, v3.4.1, v3.4.10, v3.4.11, v3.4.12, v3.4.2, v3.4.3, v3.4.4, v3.4.5, v3.4.6, v3.4.7, v3.4.8, v3.4.9].
- Conclusion: don't install symfony/dependency-injection v3.4.0-BETA2|install symfony/config v2.8.36|install symfony/config v2.8.37|install symfony/config v2.8.38|install symfony/config v2.8.39|install symfony/config v2.8.40|install symfony/config v2.8.41|install symfony/config v2.8.42
- Conclusion: don't install symfony/dependency-injection v3.4.0-BETA1|install symfony/config v2.8.30|install symfony/config v2.8.31|install symfony/config v2.8.32|install symfony/config v2.8.33|install symfony/config v2.8.34|install symfony/config v2.8.35|install symfony/config v2.8.36|install symfony/config v2.8.37|install symfony/config v2.8.38|install symfony/config v2.8.39|install symfony/config v2.8.40|install symfony/config v2.8.41|install symfony/config v2.8.42

joshua.graham@JoshG-PC MSYS /c/temp/drupal-composerphp5 (8.x)
$ composer

---

/ / ____ ___ ____ ____ ________ _____
/ / / __ / __ `_ / __ / __ / / _ / /
/ // // / / / / / / // / // (__ ) / /
_/_// // // ./_/_/___//
//
Composer version 1.6.5 2018-05-04 11:44:59
[...]

joshua.graham@JoshG-PC MSYS /c/temp/drupal-composerphp5 (8.x)
$ php -m
[PHP Modules]
apc
apcu
bcmath
bz2
calendar
Core
ctype
curl
date
dom
ereg
fileinfo
filter
ftp
gd
gettext
hash
iconv
imagick
json
libxml
mbstring
mcrypt
memcache
mhash
mongo
mysql
mysqli
mysqlnd
OAuth
odbc
openssl
pcre
PDO
pdo_mysql
Phar
Reflection
session
SimpleXML
soap
sockets
SPL
sqlite3
standard
tidy
tokenizer
wddx
xml
xmlreader
xmlwriter
xsl
Zend OPcache
zip
zlib

[Zend Modules]
Zend OPcache