如何在ubuntu中安装composer以使用omnipay？

Question

I am working to implement online payment system in codeigniter. So, I am using omnipay with codeigniter. For this reason, I have to install composer.

I am trying several times to install composer in ubuntu 12.04. But I have failed. My terminal display an error as,

 Could not create file /var/www/tcm/composer.phar: fopen(/var/www/tcm/composer.phar):
 failed to open stream: Permission denied
 Download failed: fopen(/var/www/tcm/composer.phar): failed to open stream: Permission 
 denied fwrite() expects parameter 1 to be resource, boolean given

Could you suggest me, How can I solve this problem ?

Answer 1

I have found the solution. I have to change the directory file permission to 777. Now it is ok.