1.重新安装pecl
apk update
apk add php81-dev php81-pear gcc g++ linux-headers libc-dev make libtool
pecl install xdebug
2.修改xdebug配置
cd /etc/php81
vim php.ini
#添加：
zend_extension=xdebug
xdebug.mode=trace,profile
xdebug.start_with_request=yes
xdebug.trigger_value=StartProfileForMe
xdebug.trace_output_name = xdebug.trace.%t.%s
xdebug.output_dir = /tmp
xdebug.trace_format=1