添加执行脚本 内容如下，保存并赋予执行权限
#!/bin/shEXPECTED_CHECKSUM="$(php -r 'copy("https://composer.github.io/installer.sig", "php://stdout");')"php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"ACTUAL_CHECKSUM="$(php -r "echo hash_file('sha384', 'composer-setup.php');")"if [ "$EXPECTED_CHECKSUM" != "$ACTUAL_CHECKSUM" ]then
>&2 echo 'ERROR: Invalid installer checksum'
rm composer-setup.php exit 1fiphp composer-setup.php --quiet
RESULT=$?rm composer-setup.phpexit $RESULT执行脚本，会在当前目录下安装composer文件
参考官方文档：https://getcomposer.org/doc/faqs/how-to-install-composer-programmatically.md
