How to install PHP7 nightly on Linux
Full documentation to build and install PHP7 on a Debian based linux distribution.

Deprecation
Without creating an article to install PHP7, I prefer to share with you this great post: How to Install PHP 7.0, Apache 2.4.17, & MySQL 5.6 on Ubuntu 15.10 & 14.
So, the following information in my article bellow are now deprecated and was only effective to the nightly version of PHP7.
Preamble
1sudo nano /etc/apt/sources.list 2deb http://archive.ubuntu.com/ubuntu jessie main 3aptitude update
Using early access repo
Add Zends PHP7 early access repo:
1echo "deb http://repos.zend.com/zend-server/early-access/php7/repos ubuntu/" >> /etc/apt/sources.list
To install PHP7 nighly build:
1apt-get update && apt-get install php7-nightly
Installing Apache 2.4
1aptitude install apache2 apache2-mpm-worker libapache2-mod-fastcgi
Then create the file /etc/apache2/conf-available/php7-fpm.conf with the contents:
1<IfModule mod_fastcgi.c> 2 AddHandler php7-fcgi .php 3 Action php7-fcgi /php7-fcgi 4 Alias /php7-fcgi /usr/lib/cgi-bin/php7-fcgi 5 FastCgiExternalServer /usr/lib/cgi-bin/php7-fcgi -socket /var/run/php7-fpm.sock -pass-header Authorization 6</IfModule>
Then enable the new mods and config:
1a2enmod actions fastcgi alias 2a2enconf php7-fpm 3a2dismod mpm_event 4a2enmod mpm_prefork 5service apache2 reload
Install of MySQL
1aptitude install mysql-server mysql-client
Build and configure PHP7
To get, build and install PHP7 from sources, you will need some tools to be installed in your linux. Use the next command to install the needed tools:
1aptitude install git make autoconf build-essential libt1-dev libgmp-dev bison re2c libxml2-dev libcurl4-openssl-dev libssl-dev libsslcommon2-dev libbz2-dev libjpeg-dev libfreetype6-dev libmcrypt-dev libmysqlclient-dev libaspell-dev
Create a temporary directory:
1mkdir ~/tmp 2cd ~/tmp
Clone sources from git repository:
1git clone https://git.php.net/repository/php-src.git
You can now build and configure your env
1cd php-src 2./buildconf 3./configure \ 4 --prefix=/usr/local/php7 \ 5 --with-config-file-path=/usr/local/etc/php7 \ 6 --localstatedir=/usr/local/var \ 7 --sysconfdir=/usr/local/etc/php7 \ 8 --enable-mbstring \ 9 --enable-zip \ 10 --enable-bcmath \ 11 --enable-pcntl \ 12 --enable-ftp \ 13 --enable-exif \ 14 --enable-calendar \ 15 --enable-sysvmsg \ 16 --enable-sysvsem \ 17 --enable-sysvshm \ 18 --enable-wddx \ 19 --with-curl \ 20 --with-mcrypt \ 21 --with-iconv \ 22 --with-gmp \ 23 --with-pspell \ 24 --with-gd \ 25 --with-jpeg-dir=/usr \ 26 --with-png-dir=/usr \ 27 --with-zlib-dir=/usr \ 28 --with-xpm-dir=/usr \ 29 --with-freetype-dir=/usr \ 30 --with-t1lib=/usr \ 31 --enable-gd-native-ttf \ 32 --enable-gd-jis-conv \ 33 --with-openssl \ 34 --with-mysql=/usr \ 35 --with-pdo-mysql=/usr \ 36 --with-pgsql=/usr \ 37 --with-pdo-pgsql=/usr \ 38 --with-firebird=/usr \ 39 --with-pdo-firebird=/usr \ 40 --with-pdo-odbc=unixODBC,/usr/ \ 41 --with-oci8=instantclient,/usr/lib/oracle/12.1/client64/lib \ 42 --with-pdo-oci=instantclient,/usr,12.1 \ 43 --with-interbase=/usr \ 44 --with-gettext=/usr \ 45 --with-zlib=/usr \ 46 --with-bz2=/usr \ 47 --with-recode=/usr \ 48 --with-mysqli=/usr/bin/mysql_config
You can now make and install sources
1make 2make test 3sudo make install
We now need to create a symlink:
1sudo ln -sf /usr/local/php7/bin/php /usr/bin/php
add to /etc/apache2/sites-enabled/000-default.conf or other vhost conf file:
1AddType application/x-httpd-php .php .phtml
php.ini
1cd /usr/local/etc/php7 2sudo nano php.ini
paste the code:
1max_execution_time=600 2memory_limit=128M 3error_reporting=1 4display_errors=1 5log_errors=1 6user_ini.filename= 7realpath_cache_size=2M 8cgi.check_shebang_line=0 9 10zend_extension=opcache.so 11opcache.enable_cli=1 12opcache.save_comments=1 13opcache.fast_shutdown=1 14opcache.validate_timestamps=1 15opcache.revalidate_freq=60 16opcache.use_cwd=1 17opcache.max_accelerated_files=100000 18opcache.max_wasted_percentage=5 19opcache.memory_consumption=128 20opcache.consistency_checks=0
Common errors
Unable to locate gmp.h
1ln -s /usr/include/x86_64-linux-gnu/gmp.h /usr/include/gmp.h
libfbclient, libgds or libib_util not found!
1aptitude install firebird2.5-dev
Cannot find header file(s) for pdo_odbc
1aptitude install unixodbc-dev unixodbc-bin unixodbc
Cannot find libpq-fe.h. Please specify correct PostgreSQL installation path
1aptitude install libpq-dev