composer install 遇到问题 Problem 1 - phpunit/phpunit 5.7.5 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3 0) does not satisfy that requirement.

 

 

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$ composer install 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     - phpunit/phpunit 5.7.5 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3 0) does not satisfy that requirement.     - phpunit/phpunit 5.7.4 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3 0) does not satisfy that requirement.     - phpunit/phpunit 5.7.3 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3 0) does not satisfy that requirement.     - phpunit/phpunit 5.7.2 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3 0) does not satisfy that requirement.     - phpunit/phpunit 5.7.1 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3 0) does not satisfy that requirement.     - phpunit/phpunit 5.7.0 requires php ^5.6 || ^7.0 -> your PHP version (5.5.3 0) does not satisfy that requirement.     - Installation request for phpunit/phpunit ^5.7 -> satisfiable by phpunit/ph punit[5.7.0, 5.7.1, 5.7.2, 5.7.3, 5.7.4, 5.7.5].