$ php composer.phar install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Warning: The lock file is not up to date with the latest changes in composer.jso
n. You may be getting outdated dependencies. Run update to update them.
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested PHP extension ext-pdo_sqlite * is missing from your system.
Install or enable PHP's pdo_sqlite extension.

.....

;extension=php_oci8_11g.dll  ; Use with Oracle 11gR2 Instant Client
extension=php_openssl.dll
;extension=php_pdo_firebird.dll
extension=php_pdo_mysql.dll
;extension=php_pdo_oci.dll
;extension=php_pdo_odbc.dll
extension=ext\php_pdo_pgsql.dll  (2:我顺便把这里的";"分号去掉了)
extension=php_pdo_sqlite.dll     (1:我把这里的";"分号去掉了)
;extension=php_pgsql.dll
;extension=php_pspell.dll
;extension=php_shmop.dll

......