Tag Archives: PHP

configure: error: BDB/HDB: BerkeleyDB not available

Looks like BerkeleyDB is not installed which is required to configured openLDAP.

Follow the below steps to install BerkeleyDB.

Downloading Berkeley DB

wget http://download.oracle.com/berkeley-db/db-5.2.28.tar.gz

Extracting files from the downloaded package:

tar zxvf db-5.2.28.tar.gz

cd db-5.2.28/build_unix

Create installation path

mkdir /etc/berkeleydb

Configuring Berkeley DB

../dist/configure --prefix=/etc/berkeleydb

Compile and install the code


make install


This article assume that Nginx is installed in your server and its up and running.Lest install NginX

Update the repository

yum update -y

Install the EPEL repository

yum install epel-release -y

Install Dependencies

yum install -y git gcc gcc-c++ libxml2-devel pkgconfig openssl-devel bzip2-devel curl-devel libpng-devel libjpeg-devel libXpm-devel freetype-devel gmp-devel libmcrypt-devel mariadb-devel aspell-devel recode-devel autoconf bison re2c libicu-devel libxslt-devel libxslt

Get The PHP Source

curl -O -L https://github.com/php/php-src/archive/php-7.1.18.tar.gz
tar -xvf php-7.1.18.tar.gz
cd php-src-php-7.1.18/
Compile Source Code 

./buildconf --force

./configure --prefix=/etc/php --with-config-file-path=/etc/php/etc --with-config-file-scan-dir=/etc/php/etc/conf.d --enable-bcmath --with-bz2 --with-curl --enable-filter --enable-fpm --with-gd --enable-gd-native-ttf --with-freetype-dir --with-jpeg-dir --with-png-dir --enable-intl --enable-mbstring --with-mcrypt --enable-mysqlnd --with-mysql-sock=/var/lib/mysql/mysql.sock --with-mysqli=mysqlnd --with-pdo-mysql=mysqlnd --with-pdo-sqlite --disable-phpdbg --disable-phpdbg-webhelper --enable-opcache --with-openssl --enable-simplexml --with-sqlite3 --enable-xmlreader --enable-xmlwriter --enable-zip --with-zlib --enable-soap --with-xsl

make install

Add PHP to $PATH

echo 'pathmunge /etc/php/bin' > /etc/profile.d/php.sh

Copy php.ini

cp php.ini-development /etc/php/lib/php.ini

Add module opcache

vi /etc/php/etc/conf.d/modules.ini

and add 'zend_extension=opcache.so'


mkdir /etc/php/etc/conf.d

cp sapi/fpm/www.conf /etc/php/etc/php-fpm.d/www.conf

cp sapi/fpm/php-fpm.conf /etc/php/etc/php-fpm.conf

Update PHP FPM configuration

vi /etc/php/etc/php-fpm.d/www.conf

user = nobody
group = nobody

listen.owner = nginx
listen.group = nginx

listen = /var/run/php-fpm/php-fpm.sock

Create a symlink for php-fpm to the standard path

ln -s /etc/php/sbin/php-fpm /usr/sbin/php-fpm

Create a systemctl file add the following:

vi /usr/lib/systemd/system/php-fpm.service

Description=The PHP FastCGI Process Manager
After=syslog.target network.target

ExecStart=/usr/sbin/php-fpm --nodaemonize --fpm-config /etc/php/etc/php-fpm.conf
ExecReload=/bin/kill -USR2 $MAINPID


Create a run directory for php-fpm:

mkdir /run/php-fpm

Start php-fpm and Restart NginX

systemctl start php-fpm

service nginx restart

Create index.php

mv /etc/nginx/html/index.html /etc/nginx/html/index.php

Update nginx.con file with the followinf content

root /etc/nginx/html;
index index.php index.html index.htm;

location ~ \.php$ {
try_files $uri =404;
fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock;
fastcgi_index index.php;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
include fastcgi_params;

Load URL



Install NginX CentOS From Source

Update the repository

yum update -y

Install the EPEL repository

yum install epel-release -y

Install dependencies from yum

yum install -y zlib zlib-devel pcre prce-devel openssl openssl-devel

Get the Nginx packages to install

cd /usr/src
wget https://nginx.org/download/nginx-1.14.0.tar.gz
tar xvf nginx-1.14.0.tar.gz
cd nginx-1.14.0

Create user nginx

useradd -d /etc/nginx/ -s /sbin/nologin nginx


./configure --user=nginx --group=nginx --prefix=/etc/nginx --sbin-path=/usr/sbin/nginx --conf-path=/etc/nginx/nginx.conf --pid-path=/var/run/nginx.pid --lock-path=/var/run/nginx.lock --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --with-http_gzip_static_module --with-http_stub_status_module --with-http_ssl_module --with-pcre --with-file-aio --with-http_realip_module --without-http_scgi_module --without-http_uwsgi_module --with-http_realip_module

Compile and Install

make install

Verify NginX is installed

nginx -v

Add systemd service file

vi /etc/systemd/system/nginx.service

Description=The NGINX HTTP and reverse proxy server
After=syslog.target network.target remote-fs.target nss-lookup.target

ExecStartPre=/usr/sbin/nginx -t
ExecReload=/usr/sbin/nginx -s reload
ExecStop=/bin/kill -s QUIT $MAINPID


Enable and start service

systemctl enable nginx
systemctl start nginx

Check nginx is processing your request

On commandline

curl localhost


Make sure port 80 is enabled.

firewall-cmd --zone=public --add-port=80/tcp --permanent && firewall-cmd --reload

Findout the ip

ip addr

Load the site using the URL and it should display ‘Welcome to nginx!’ message.



Magento 2 External PHP Script

use Magento\Framework\App\Bootstrap;
require __DIR__ . '/app/bootstrap.php';
$params = $_SERVER;
$bootstrap = Bootstrap::create(BP, $params);
$objectManager = $bootstrap->getObjectManager();
$state = $objectManager->get('Magento\Framework\App\State');

$resource = $objectManager->get('Magento\Framework\App\ResourceConnection');
$connection = $resource->getConnection();

$sql = "Select * FROM customer_entity" ;
$result = $connection->fetchAll($sql); 

Install PHP CentOS From Source CentOS Linux

Install required tools for compilation

In order to compile PHP from source you need to install few tools and libraries. First you need EPEL repository to be enabled. This repository contains more recent version of packages.

sudo yum install epel-release -y

Once you have it installed execute following command to install required packages

yum install autoconf libtool re2c bison libxml2-devel bzip2-devel libcurl-devel libpng-devel libicu-devel gcc-c++ libmcrypt-devel libwebp-devel libjpeg-devel openssl-devel libxslt-devel -y

Download and unpack PHP Source code

Next step is downloading PHP source code. Easiest option is to download it from GitHub PHP releases. Choose the version you would like to install. In my case it’s 7.2.3. Copy link to tar.gz archive and execute following commands:

curl -O -L https://github.com/php/php-src/archive/php-7.1.18.tar.gz

tar -xvf php-7.1.18.tar.gz

cd php-src-php-7.1.18/

It will download the archive from GitHub, unpack the sources and change working directory to unpacked sources.

Compile PHP

Now it’s time to compile PHP. First we need to build configure command. In order to do that execute following command:

./buildconf --force

Once configure command is created we can use it to configure PHP installation. This process will enable certain PHP extensions such as PDO, FPM, OPCache, GD library etc. If you need any libraries that are not provided here, you can execute ./configure –help option and check if there is something you need. Following command will install PHP with most common extensions:

./configure --prefix=/usr/local/php --with-apxs2=/usr/local/apache2/bin/apxs --with-freetype-dir=/usr/include/freetype2 --disable-short-tags --enable-xml --enable-cli --with-openssl --with-pcre-regex --with-pcre-jit --with-zlib --enable-bcmath --with-bz2 --with-curl --enable-exif --with-gd --enable-intl --with-mysqli --enable-pcntl --with-pdo-mysql --enable-soap --enable-sockets --with-xmlrpc --enable-zip --with-webp-dir --with-jpeg-dir --with-png-dir --enable-json --enable-hash --enable-mbstring --with-mcrypt --enable-libxml --with-libxml-dir --enable-ctype --enable-calendar --enable-dom --enable-fileinfo --with-mhash --with-incov --enable-opcache --enable-phar --enable-simplexml --with-xsl --with-pear

Apart from enabling extensions command above will also set where PHP will be installed. In my case it’s /usr/local/php location. If you will want to remove compiled PHP you will simply have to remove entire directory given under –prefix option.

Next it’s time to compile PHP. Please be aware that it takes few minutes:

make clean
make test

Install compiled PHP

Once PHP is compiled it is time to install it. Simply execute following command:

sudo make install

php.ini and OPCache configuration

Second thing is php.ini file. After installation php.ini file should located in /usr/local/php/lib. This is only the location. After compiling from source You won’t anything there so we need to copy it from uncompressed sources.

cd /usr/local/php/lib
cp /tmp/php-src-php-7.1.18/php.ini-development ./php.ini
vi php.ini

Add PHP to $PATH

We can do one more thing to make our life easier:) Add PHP executable to PATH, so we’ll be able to call php command from every directory.

echo 'pathmunge /usr/local/php/bin' > /etc/profile.d/php.sh

Execute such command, log out, log in and You’ll be able to execute:

php -v

Setup GZIP compression CentOS Linux

GZIP compression has serious impact on performance and your website loading time. In order to use it make sure that mod_deflate and mod_filter are enabled.

First create new file that will contain GZIP settings for Apache:

sudo vi /usr/local/apache2/conf/extra/httpd-deflate.conf

Paste there following content and save the file:

<IfModule mod_deflate.c>
<IfModule mod_filter.c>
AddOutputFilterByType DEFLATE application/ecmascript
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/xml

It will add GZIP compression to most popular file types such as HTML, CSS, JS etc. If you need anything else that requires compressing, simply add more MIME types.

Now you need to include it to main Apache configuration. so open httpd.conf and Include httpd-deflate.conf.

vi /usr/local/apache2/conf/httpd.conf and make sure the following line is added.

Include conf/extra/httpd-deflate.conf


Apache Shows PHP Code Instead Of Executing CentOS Linux

Make sure that PHP is installed and running correctly. An easy way to check is to run php -v from a command line and see if returns version information or any errors.

Make sure that the PHP module is listed and uncommented inside of your Apache’s httpd.conf

LoadModule php7_module modules/libphp7.so

Make sure that Apache’s httpd.conf file has the PHP MIME type in it. This should be something like AddType application/x-httpd-php .php. This tells Apache to run .php files as PHP. Search for AddType, and then make sure there is an entry for PHP, and that it is uncommented.


Magento 2 Allow NULL Value Multiselect System Configuration

It can be achieved bu adding the <can_be_empty>1</can_be_empty> tag in system.xml file


<field id="hideprice" translate="label" type="multiselect" sortOrder="1" showInDefault="1" showInWebsite="1" showInStore="1">
<label>Hide Price For</label>

Magento 2 Unable To Unselect All Multiselect Values

Add the tag <can_be_empty>1</can_be_empty> with the field in system.xml file and now you should be enable to Unselect the multi select values.


<field id="hideprice" translate="label" type="multiselect" sortOrder="1" showInDefault="1" showInWebsite="1" showInStore="1">
<label>Hide Price For</label>