Composer Your requirements could not be resolved to an installable set of packages
Composer install 時候報錯：
Composer update 時候報錯：
Your requirements could not be resolved to an installable set of packages
Problem 1
Root composer json requires topthink/framework 5 1.*, found topthink/framework [v5. 1. 41] in the lock file but not in remote repositories, make sure you av d updating this package to keep the one from the lock file
解決方案一：
composer update --ignore-platform-regs
使用強制安裝更新
解決方案二：
更換composer映象地址；
使用：
"repositories": {
"packagist": {
"type": "composer",
"url": "https://packagist.phpcomposer.com"
}
}
或者：
"repositories": {
"packagist": {
"type": "composer",
"url":
}
}
切換 映象地址後一般可以解決這個問題；
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