the computer has reinstalled the system (windows10), installed xampp (xampp for php7), and then follow the tutorial on composer"s official website to install composer step by step. After the installation is successful (composer-version can show the version number)
, if you try to perform other instructions such as composer install or composer init, the exception of PHP will be thrown as follows:
[ErrorException]
proc_open(NUL): failed to open stream: No such file or directory
No solution has been found at present. Ask God to solve the problem