PHP Composer - Unable to install composer on macOS Sierra

Question

I'm trying to install composer running the command provided on the getcomposer.org/download documentation site:

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('SHA384', 'composer-setup.php') === 'e115a8dc7871f15d853148a7fbac7da27d6c0030b848d9b3dc09e2a0388afed865e6a3d6b3c0fad45c48e2b5fc1196ae') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

But I get an error message saying:

Warning: copy(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed in Command line code on line 1

Warning: copy(): Failed to enable crypto in Command line code on line 1

Warning: copy(https://getcomposer.org/installer): failed to open stream: operation failed in Command line code on line 1
Yoshihiros-MacBook-Pro:~ yoshihiro$ php -r "if (hash_file('SHA384', 'composer-setup.php') === 'e115a8dc7871f15d853148a7fbac7da27d6c0030b848d9b3dc09e2a0388afed865e6a3d6b3c0fad45c48e2b5fc1196ae') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"

Warning: hash_file(composer-setup.php): failed to open stream: No such file or directory in Command line code on line 1
Installer corrupt
Warning: unlink(composer-setup.php): No such file or directory in Command line code on line 1

Yoshihiros-MacBook-Pro:~ yoshihiro$ php composer-setup.php
Could not open input file: composer-setup.php

I'm also trying to install it globally but I can't get out of this message. Please help D:

Answer 1

I had same issues but this what I did:

• I copy paste this into the terminal php -r "copy('http://getcomposer.org/installer', 'composer-setup.php');" on the terminal which download the composer to the directory where you are currently In.

(the problem was causing because of the https protocol)

• And then php composer-setup.php --install-dir=/usr/local/bin --filename=composer run this command, which installs the Composer to my bin folder so that i could run it globally.

• Then you have to unlink the composer php -r "unlink('composer-setup.php');"

• Finally check the see the Composer installed composer -V.

Good Luck !