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PHP: Solve undefined key / offset / property warnings. Multi-level nested keys

This is the ad hoc tutorial on how to solve php undefined key, undefined property warnings. Five different solutions are considered. Custom function is developed.

Category: PHP Tags: php, undefined key, warnings

Run Multiple Databases (MySQL, Oracle, MSSQL, PostgreSQL, MongoDB) in Single Machine Using Docker (and Vagrant)

Multiple Databases via Docker Vagrant

This is the ad hoc tutorial on how to setup and run multiple databases simultaneously (MySQL, Oracle, MSSQL, PostgreSQL and MongoDB) in single machine using Docker approach .

Category: CentOS Databases Docker Linux / Unix MongoDB MSSQL MySQL Oracle PostgreSQL Vagrant Virtualization Tags: centos7, docker, dockerization, linux, mongodb, mssql, mysql, oracle, postgresql, vagrant

MySQL Selective/Exceptional Permissions and Backup/Restore

MySQL_Selective

This is the ad hoc tutorial on how to provide exceptional or selective privileges to users, also how to backup/restore selectively in MySQL.

Category: Bash CentOS Databases Linux / Unix MySQL Tags: backup/restore, bash, batch, exceptional permissions, mysql, selective permissions

Setup Remote GIT Repository Server on CentOS 7

Git_Server

This is the ad hoc tutorial on how to setup remote GIT repository server on CentOS 7. We will create the local GIT server to serve as remote repository for team projects.

Category: CentOS Git Linux / Unix OS Versioning Tags: centos, git, git server, remote repository

Export Powerpoint .ppt/.pptx 2000/2003/2007 Presentation to Video .mp4/.avi

ppt_mp4

This is the ad hoc tutorial on how to export the Microsoft Powerpoint 2000/2003/2007 presentations .ppt/.pptx to video format .mp4/.avi including animations.

Category: Microsoft Office Microsoft Powerpoint Software Tags: converter, export, mp4, powerpoint 2007, ppt to video

How to Export Excel Sheet to CSV with Unicode/UTF-8

Excel_CSV_Unicode

This is the ad hoc tutorial on how to export the excel sheet to CSV format with unicode characters. We will provide two options using Excel+Notepad and LibreOffice.

Category: MySQL Tags: csv, excel, import/export, mysql, unicode

Find Stationary Distribution of Markov Chain using Stochastic Simulation (Gillespie’s) in Python

This is the ad hoc tutorial on how to simulate continuous Markov Chain using Gillespie’s Direct Stochastic Simulation algorithm and find its stationary distribution and estimate the accuracy.

Category: Math Python Simulation Tags: gillespie, markov chain, monte carlo, mse, python, simulation, stochastic simulation

Fix Oracle “IO ERROR: The network adapter could not establish the connection” error

Fix Oracle “IO ERROR: The network adapter could not establish the connection” error

This is the ad hoc tutorial on how to fix “IO ERROR: The network adapter could not establish the connection” error while trying to connect Oracle Database.

Category: Databases Oracle Tags: error fix, IO ERROR, IO ERROR: The network adapter could not establish the connection, oracle, The network adapter could not establish the connection

Create SFTP User / Group with CHROOT option in Linux / Unix

SFTP+CHROOT+LINUX

This is the ad hoc tutorial on how to create sftp user with chroot option in CentOS. We will create a single sftp user with chroot folder and separate sftp group with the users having dynamic chrooted home folder.

Category: CentOS Linux / Unix OS Security Tags: centos, chroot, linux, security, sftp

Setup ORACLE 12C / 11G PDO for PHP 7.2 / 7.x

Oracle+PDO+PHP

This is the ad hoc tutorial on how to enable PHP PDO for ORACLE 12C / 11G. We’ll install the Oracle pdo package, create the php configuration file and test the connectivity with PDO to ORACLE server.

Category: Apache+PHP Databases Oracle PHP Software Development Web Development Web Servers Tags: apache, apache24, oracle, oracle11g, oracle12c, pdo, php, php72
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Recent Tutorials

  • PHP: Solve undefined key / offset / property warnings. Multi-level nested keys
  • Run Multiple Databases (MySQL, Oracle, MSSQL, PostgreSQL, MongoDB) in Single Machine Using Docker (and Vagrant)
  • MySQL Selective/Exceptional Permissions and Backup/Restore
  • Setup Remote GIT Repository Server on CentOS 7
  • Export Powerpoint .ppt/.pptx 2000/2003/2007 Presentation to Video .mp4/.avi

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