ERROR message while trying to setup Composer:

192:~ biancalouisedairo$  php -r "copy('', 'poser-setup.php');"
192:~ biancalouisedairo$ php -r "if (hash_file('sha384', 'poser-setup.php') === '93b54496392c062774670ac18b134c3b3a95e5a5e5c8f1a9f115f203b75bf9a129d5daa8ba6a13e2cc8a1da0806388a8') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('poser-setup.php'); } echo PHP_EOL;"
Installer verified
192:~ biancalouisedairo$ php poser-setup.php --install-dir=/usr/local/bin
All settings correct for using Composer
The installation directory "/usr/local/bin" is not writable
192:~ biancalouisedairo$ 

ERROR message while trying to setup Composer:

192:~ biancalouisedairo$  php -r "copy('https://getposer/installer', 'poser-setup.php');"
192:~ biancalouisedairo$ php -r "if (hash_file('sha384', 'poser-setup.php') === '93b54496392c062774670ac18b134c3b3a95e5a5e5c8f1a9f115f203b75bf9a129d5daa8ba6a13e2cc8a1da0806388a8') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('poser-setup.php'); } echo PHP_EOL;"
Installer verified
192:~ biancalouisedairo$ php poser-setup.php --install-dir=/usr/local/bin
All settings correct for using Composer
The installation directory "/usr/local/bin" is not writable
192:~ biancalouisedairo$ 

• javascript
• php
• poser-php
• laravel-5.1

• 1 Use sudo then. – mario Commented Nov 11, 2018 at 12:08
• Ive tried but it says File exists. – Bianca Piper Commented Nov 11, 2018 at 12:11

5 Answers 5

Use sudo before your mand

like this sudo php poser-setup.php --install-dir=/usr/local/bin

This will remove any already-installed Composer and install it correctly for you:

sudo rm -f /usr/local/bin/poser
EXPECTED_SIGNATURE=$(curl -s https://poser.github.io/installer.sig)
php -r "copy('https://getposer/installer', 'poser-setup.php');"
ACTUAL_SIGNATURE=$(php -r "echo hash_file('SHA384', 'poser-setup.php');")

if [ "$EXPECTED_SIGNATURE" == "$ACTUAL_SIGNATURE" ]
then
    php poser-setup.php --quiet
    rm poser-setup.php
    sudo mv poser.phar /usr/local/bin/poser
    sudo chmod 777 /usr/local/bin/poser
fi

Just incase, don't forget to cd (cd and space) to your home/root before running the installation mands from any of the upvoted or approved answers

cd 

First make a folder. Than open mand prompt or git bash on that folder than run all the mand one by one.

mkdir phpproject

cd phpproject

than run all mands one by one

php -r "copy('https://getposer/installer', 'poser-setup.php');"

php -r "if (hash_file('sha384', 'poser-setup.php') === '55ce33d7678c5a611085589f1f3ddf8b3c52d662cd01d4ba75c0ee0459970c2200a51f492d557530c71c15d8dba01eae') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('poser-setup.php'); } echo PHP_EOL;" Installer verified

php poser-setup.php

output

All settings correct for using Composer Downloading...

Composer (version 2.3.10) successfully installed to: C:\Users\Rabbil khan\Deskto p\phpproject\poser.phar Use it: php poser.phar

... than just simply run -- php poser.phar

Because you are not root user use sudo -i to give p