wschlich:

root@LEDE:# opkg list-installed 'php7*'
php7 - 7.1.1-1
php7-cgi - 7.1.1-1
php7-cli - 7.1.1-1
php7-fastcgi - 7.1.1-1
php7-fpm - 7.1.1-1
php7-mod-calendar - 7.1.1-1
php7-mod-ctype - 7.1.1-1
php7-mod-curl - 7.1.1-1
php7-mod-dom - 7.1.1-1
php7-mod-exif - 7.1.1-1
php7-mod-fileinfo - 7.1.1-1
php7-mod-ftp - 7.1.1-1
php7-mod-gd - 7.1.1-1
php7-mod-gettext - 7.1.1-1
php7-mod-hash - 7.1.1-1
php7-mod-iconv - 7.1.1-1
php7-mod-intl - 7.1.1-1
php7-mod-json - 7.1.1-1
php7-mod-mbstring - 7.1.1-1
php7-mod-mcrypt - 7.1.1-1
php7-mod-opcache - 7.1.1-1
php7-mod-openssl - 7.1.1-1
php7-mod-pcntl - 7.1.1-1
php7-mod-pdo - 7.1.1-1
php7-mod-pdo-sqlite - 7.1.1-1
php7-mod-phar - 7.1.1-1
php7-mod-session - 7.1.1-1
php7-mod-shmop - 7.1.1-1
php7-mod-simplexml - 7.1.1-1
php7-mod-soap - 7.1.1-1
php7-mod-sockets - 7.1.1-1
php7-mod-sqlite3 - 7.1.1-1
php7-mod-sysvmsg - 7.1.1-1
php7-mod-sysvsem - 7.1.1-1
php7-mod-sysvshm - 7.1.1-1
php7-mod-tokenizer - 7.1.1-1
php7-mod-xml - 7.1.1-1
php7-mod-xmlreader - 7.1.1-1
php7-mod-xmlwriter - 7.1.1-1
php7-mod-zip - 7.1.1-1
php7-pecl-dio - 0.0.9-1
php7-pecl-libevent - 2016-08-30-9e72744ce6224beafc7b54ce2a3a990f1c552a5a-1
php7-pecl-propro - 2.0.1-2
php7-pecl-raphf - 2.0.0-2
root@LEDE:# php-cli -r 'print("kthxbye\n");'
kthxbye
root@LEDE:# opkg install php7-pecl-http
Installing php7-pecl-http (3.1.0-2) to root...
Downloading http://downloads.lede-project.org/releases/17.01.2/packages/arm_cortex-a53_neon-vfpv4/packages/php7-pecl-http_3.1.0-2_arm_cortex-a53_neon-vfpv4.ipk
Configuring php7-pecl-http.
root@LEDE:# php-cli -r 'print("kthxbye\n");'
Segmentation fault
root@LEDE:# opkg remove php7-pecl-http
Removing package php7-pecl-http from root...
root@LEDE:# php-cli -r 'print("kthxbye\n");'
kthxbye
root@LEDE:~#