PHP

The First Steps

Setup PHP on Windows Setup PHP on MacOS Set Up PHP in Ubuntu Upgrade PHP Windows Upgrade PHP in MacOS Why Use PHP? Fix PHP OCI8 Error Fix PHP in Windows Fix PHP in MacOS PHP Basics Upgrade PHP versions Check PHP Version PHP Data Types PHP Commenting PHP Variable Basics PHP Constants Locating php.ini File Optimal php.ini Setup PHP Error Log File Error Reporting in PHP PHP Error Handling PHP & .env files PHP Naming Guide PHP Keywords Guide Variable Scope PHP PHP Var References PHP var_dump() Guide echo vs print PHP Variable Types PHP Boolean Basics Using Enum in PHP Mastering if-else PHP switch-case PHP Try-Catch PHP 'for' Loops PHP 'foreach' loops While Loops in PHP Ternary Operator PHP PHP & NULL PHP Functions Guide PHP Callbacks PHP Var Args PHP Default Args PHP Multiple Return PHP Anon Functions PHP 'declare' PHP exit & die PHP 'goto' Guide PHP Code Include PHP Type Hinting PHP High Order Funcs PHP printf & sprintf Pass Array to Func Check PHP Function Fixing PHP Syntax Errors Check PHP Null PHP T_STRING Error Truthy & Falsy in PHP PHP End of File Error PHP Loop Control PHP ?? Operator Optional Type PHP PHP Closures PHP Arrow Functions PHP Comparisons PHP Casting Guide IP to Location in PHP PHP 'instanceof' PHP Import Functions PHP Date & Time PHP: Ping Server & Response Time Format Date & Time PHP Timestamp UTC to Local Time PHP UTC Conversion PHP Timestamp Conv PHP Time Conversion PHP Date Arrays Subtract Days in PHP Compare Dates PHP Check Valid Date String to DateTime Compare PHP Dates Date Range Overlap PHP & Daylight Saving Sort Dates in PHP Calculate Age PHP Date from DateTime PHP Future Date PHP Variable Vars Fix PHP Notices Composer Setup Windows Fixing PHP Header Warnings Credit Card Validation in PHP Composer Setup - Mac Setup Composer - Ubuntu Post to Twitter with PHP Fix PHP Memory Error Composer PHP Error Install Specific Package Fix Composer Error PHP Composer Resolution Error Fix Composer Error Composer zip error Upgrade Composer Pkgs Extract HTML Headings in PHP Composer.phar Error Composer Memory Error Setting PHP in Composer Fix PHP mbstring Fixing ext-intl Error Fix ext_curl Error Clear Composer Cache Composer Permission Fix Pandas DataFrame.value_counts() PHP Constructor Property Promotion PHP DocBlock Variable Annotations Union Types in PHP Guide PHP Mixed Types Explained Static Return Type in PHP Nullable Types in PHP Guide PHP Class Property Types PHP 8+ Attributes Guide Intro to WeakMap in PHP PHP 8+ Type Checking Guide 'never' Return Type in PHP 8.1+

Numbers & Strings

Numbers in PHP PHP Rounding Guide PHP Math Ops PHP Exponentials Format Numbers in PHP PHP Float Formatting Calculate Fibonacci Int & Binary in PHP String to Number PHP Hex Conversion Random Numbers in PHP PHP Random Numbers PHP Leap Years Num <> Bytes in PHP PHP: Format Numbers Extract Numbers PHP Check Prime in PHP Int or Float Check PHP Float Formatting PHP Numeric Functions PHP: Num to Words PHP Byte Conversion Number Suffixes Odd or Even in PHP PHP: K, M Formatting PHP Number Ranges PHP Number Check PHP Float Extraction PHP Scientific Notation Fix Division Error PHP String Cheat Sheet PHP Quotes PHP n to
Multiline Strings PHP String Case String Length in PHP Check Empty Strings Count Words in PHP PHP String Slicing Find & Replace in PHP PHP: Substring Check Base64 in PHP PHP String & Array String to Array PHP String to Hex in PHP String <-> Binary String to Bytes PHP Random Strings Trim Whitespace PHP Trim Whitespaces Greedy regex quantifiers Trim PHP Empty Lines Validate Email PHP Validate URLs in PHP Extract Domain/Name IP Validation PHP Filename & Extension PHP Phone Validation Credit Card Validation Extract URLs in PHP Escape Double Quotes PHP String Compare String Concat PHP PHP Str & Vars PHP RegEx Cheat Sheet PHP Iterations PHP Title to Slug Count Substrings Escape Sequences in PHP Reverse String PHP String to Char PHP Strip HTML in PHP Split String in PHP Price Formatting String Size in PHP PHP Search & Replace PHP String Check Random Hex Colors Unescape HTML in PHP PHP: Get nth Char Random String PHP PHP String Format PHP: Clean Strings PHP Query Strings PHP String & Object String Has Number? PHP Whitespace Chars Check String2Number Check String to Date Strip Accents PHP PHP Regex Basics PHP Regex Tips Advanced Regex PHP URL Parsing

Data Structures

PHP Array Creation PHP Arrays Guide PHP Array Access Append in PHP Insert in PHP Array Prepend Array PHP Array Length in PHP Checking Empty Array Iterating in PHP PHP Array Cheatsheet Reverse Array PHP Remove Array Element Updating Arrays in PHP PHP Array Slicing PHP Array Sum Array Product in PHP PHP Array Average PHP Min/Max Array Clean PHP Arrays Sorting Arrays in PHP Nested Arrays in PHP Filter Array in PHP Merge Arrays in PHP Common Elements PHP PHP Array Elements PHP Array & Object Sort Objects in PHP PHP Array Sorting Check Array in PHP PHP Array Chunks PHP Array Reduction Shuffle Array PHP PHP Random Element Array Differences Count Array Values Remove Array Dups Array Mapping PHP PHP: Clean Arrays Clean Array in PHP Array to JSON in PHP Empty Array in PHP Deep Clone in PHP PHP Object Creation PHP Object Access Add Props to Object Update PHP Object PHP Obj to JSON JSON to PHP Object PHP Class Tutorial PHP Static Guide PHP Constructors Understanding 'this' PHP Class Constants PHP Inheritance PHP Interfaces PHP Destructors PHP OOP Cheat Sheet PHP Traits Guide PHP Interface Guide PHP Abstract Classes PHP Anonymous Classes PHP Polymorphism PHP Overloading PHP Visibility Magic Methods in PHP PHP Singletons PHP Dependency Inject PHP Namespaces Method Chaining PHP PHP Exception Guide Final in PHP Immutable PHP Objs PHP Autoloading Fix PHP Class Error Fixing PHP Parse Error PHP Redeclare Fix PHP Strict Standards PHP Fatal Error Fix PHP Warning Fix PHP Abstract Error PHP Fix Undefined PHP Fatal Error Fix PHP Illegal Offset Fix PHP Static Error PHP Interface Error Fix PHP Class Error Fix PHP: Non-static Method Fixing PHP Fatal Error Fix PHP Parse Error Merge PHP Objects List PHP Properties Compare PHP Objects Array Comparison Iterating Objects Traversable in PHP stdClass in PHP PHP Resource Type PHP Callable Guide PHP Iterable Guide PHP Generators Weighted Random Selections in PHP Finding Array Modes in PHP PHP SplFixedArray PHP External Namespaces PHP & 3rd-Party Libs Get N Random Array Elements in PHP PHP: Std Deviation & Variance Fixing PHP Notice Fixing PHP Warning Fix PHP Undefined Fix PHP Non-object

System & File I/O

Convert CSV to HTML Tables Current Dir in PHP List Files with PHP PHP File Copying PHP File Deletion Guide PHP Delete Directory Relative to Absolute PHP Dir Operations PHP File Access File/Dir Exists PHP PHP File I/O PHP File Size PHP: R/W HTML File PHP Folder Size PHP & JSON Files PHP chmod() Guide PHP & XML Files PHP File Iteration PHP File Download CSV in PHP File Creation Time PHP File Handling Validate File Path Zip/Unzip in PHP Read File Line by Line Append Line in PHP Check File in Use Check File Write PHP Rename Guide PHP File Error Fix PHP Line Replacement PHP Open/Create File PHP AWS S3 Upload PHP to Dropbox Bulk Rename in PHP Check Remote File PHP File Regex PHP File Exceptions I/O with Bin Files PHP File Encoding Temp Files in PHP Sort Files in PHP Sort Files PHP PHP File Ops Limits PHP System Info PHP File Crypto Resize Images in PHP PHP Watermarking PHP Text on Image Grayscale in PHP Image Conversion Change Img Metadata Parse PDF in PHP Write to PDF in PHP PHP shell_exec() List Images in PHP PHP Date Directories Parse/Decode QR Codes in PHP PHP & Unsplash API Tutorial

PHP & Web

PHP and HTML Mix Handling GET in PHP POST in PHP Form Validation PHP Image Upload in PHP Send Emails in PHP PHP Email Attachments Get User IP in PHP Fetch HTML in PHP PHP Cookies Guide PHP Sessions PHP Login/Logout PHP Page Redirect PHP Response Headers Extract User-Agent Connect to MySQL Prevent SQL Injection CRUD in PHP & MySQL PHP MySQL Pagination Keyword Search in PHP SQLite in PHP MongoDB with PHP PostgreSQL in PHP PHP HTML Templates Multi-DB Connections PHP Blank Page Fix Deploy PHP to Ubuntu Free PHP Hosting PHP & MySQL Tables Auto DB Backup Auto Send Email PHP Count Rows in PHP Filter by Date Range Latest Record Fetch SQL Char Escaping PHP: JSON to HTML Table Output HTML in PHP Insert Content After N-th Para

Symfony & Doctrine

Why Symfony Matters Symfony 'Hello World' Symfony Best Practices Symfony Setup Symfony Flex Libs Symfony CLI Guide Symfony & Ports Symfony & Docker Dockerize Symfony Deploy Symfony App Symfony Config Files Guide Symfony Debugging Symfony & Twig Tutorial Symfony vs Laravel Comparison Symfony Routing Symfony Route Limits Symfony Route Guide Retrieve Route Names in Symfony Extract Query String Symfony Validate Symfony Params Optional Route Params Symfony Routes Guide Symfony Route Enum Guide Deprecate Symfony Routes Route Groups in Symfony i18n Routes in Symfony Symfony URLs Guide Get IP in Symfony Getting User Agent in Symfony Parsing Request Body Parse Request Headers Symfony Redirection Guide Symfony Controllers Handling 404 Errors Symfony Validation File Upload In Symfony Symfony Sessions JSON in Symfony Symfony File Streaming Guide Symfony Custom Response Headers Custom Status Codes in Symfony Using ENV Variables in Symfony Symfony User Authentication Handling CORS in Symfony Serve Static in Symfony Symfony XML Response CSV in Symfony Symfony Zip Return Symfony & Twig Assets Global Variables in Twig Symfony Cookies Management Twig Templates & Reusable Blocks Escape Output in Twig Templates Render Twig in Symfony Upgrade Symfony to Latest Version Emails in Symfony Request to Response Symfony Event Listeners Guide Symfony Sub-Requests Embedding Symfony Controllers Create & Display QR Code Symfony File Validation Symfony Scheduling Log Requests in SF Doctrine & MySQL PHP Doctrine & PGSQL PHP & SQLite Doctrine Multidb Doctrine Tables Doctrine Table Alter Drop a Table with Doctrine PHP Doctrine: Auto-Increment PK Service Tags in Symfony Lazy Services in Symfony Symfony DI Tutorial Symfony Service Alias CSRF in Symfony Guide Symfony Caching Rate Limiting in Symfony Unit Testing in Symfony Guide Symfony Testing Guide Define Doctrine Entity Symfony & Doctrine Pagination Filter Data in PHP Counting Rows in PHP Raw SQL in Doctrine Doctrine QueryBuilder Sub-Queries in Doctrine Guide Sorting in Doctrine Symfony & Doctrine CRUD Basics View Doctrine's SQL Queries Doctrine Data Types Using Enum with PHP Doctrine Doctrine Timestamps Doctrine & PHP Arrays Store JSON in Doctrine Storing PHP Objects in DB Doctrine Sorting Random Row in PHP Doctrine N Random Rows Doctrine AND & OR Stripe in Symfony LIKE Operator in Doctrine Guide Symfony Authorization Guide Symfony & Doctrine Cursor Pagination Paypal with Symfony Doctrine One-to-One Guide Doctrine 1-to-Many Guide Doctrine Many-to-Many Guide Self-Referencing in Doctrine Symfony Validators with Doctrine Index & Unique in Doctrine Unsigned Integer in Doctrine PHP Doctrine Upsert Tutorial Bulk Insert Tutorial Select Rows by IDs Weighted Random Queries Number Comparison Symfony & Doctrine Data Migration Safe Data Schema Updates Update Records with Doctrine Delete via Doctrine Decode JSON in Twig Dynamic Twig Vars Cascade Delete in Doctrine Symfony Current Route Error Handling Doctrine GROUP BY PHP Doctrine Records Timeout for Doctrine Queries Exclude Passwords Default Symfony TZ Doctrine Default Values Doctrine NULL/NOT NULL Selection Handling JSON in Symfony Access Session in Twig Doctrine RMInvalidArgumentException PDOException Fix Symfony Current URL Log Out Users in Symfony Call PHP in Twig Symfony Compile Error Symfony Form Component Guide Returning PDFs in Symfony Symfony Route Guards

Laravel & Eloquent

How to Upgrade PHP Versions on Ubuntu

Updated: January 19, 2024 By: Khue Post a comment

PHP is a general-purpose scripting language that is especially suited for web development. It can be embedded into HTML and run on a web server. PHP has many features and extensions that make it powerful and flexible for creating dynamic web pages.

You may want to upgrade PHP on Ubuntu for various reasons, such as:

To get the latest features and improvements of PHP, such as new syntax, functions, classes, and constants.

To fix bugs and security issues that may exist in older versions of PHP.
To improve the performance and compatibility of your PHP applications with other software and libraries.

Table Of Contents

1 Prerequisites

2 The Steps

2.1 Step 1: Check the current version of PHP

2.2 Step 2: Add the Ondřej Surý’s PHP PPA

2.3 Step 3: Update the package lists

2.4 Step 4: Remove the old version of PHP (optional)

2.5 Step 5: Install the new version of PHP

2.6 Step 6: Install additional PHP modules

2.7 Step 7: Restart the web server

3 Conclusion

Prerequisites

To upgrade PHP on Ubuntu, you will need:

An Ubuntu server with root access or a user with sudo privileges.
A terminal or an SSH client to access your server.
A backup of your data and configuration files in case something goes wrong during the upgrade process.

The Steps

Step 1: Check the current version of PHP

Before upgrading PHP, you should check the current version of PHP that is installed on your server. You can do this by running the following command in your terminal:

php -v

Output (may vary):

PHP 7.4.3 (cli) (built: Feb 23 2020 07:24:02) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.3, Copyright (c), by Zend Technologies

Step 2: Add the Ondřej Surý’s PHP PPA

We will need to add a third-party repository that provides the latest versions of PHP for Ubuntu. One of the most popular and reliable repositories is Ondřej Surý’s PHP PPA. This repository contains packages for PHP 8.1, PHP 8.0, and PHP 7.4.

To add this repository to your system, perform the command below:

sudo add-apt-repository ppa:ondrej/php

You will be asked to confirm the addition by pressing ENTER.

Step 3: Update the package lists

After adding the repository, you need to update the package lists on your system to get the latest information about the available packages from the repository. You can get the job done by executing the following command:

sudo apt update

This will fetch the package lists from all the repositories that are enabled on your system, including Ondřej Surý’s PHP PPA.

Step 4: Remove the old version of PHP (optional)

If you want to remove the old version of PHP from your system before installing the new one, you can do this by running the following command in your terminal:

sudo apt remove php7.4

Don’t forget to replace php7.4 with the version of PHP that you want to remove.

This will uninstall the old version of PHP and its dependencies from your system.

Note: This step is optional and not required for upgrading PHP on Ubuntu. However, it may help you save some disk space and avoid potential conflicts between different versions of PHP.

Step 5: Install the new version of PHP

Now that you have added the repository and updated the package lists, you can install the new version of PHP on your system. You can choose from PHP 8.1, PHP 8.0, or PHP 7.4, depending on your preference and compatibility with your applications. In this tutorial, I’ll go with PHP 8.1.

To install the new version of PHP on your server, perform the command below:

sudo apt install php8.1

This will install the new version of PHP and its dependencies on your system.

Step 6: Install additional PHP modules

Depending on your needs and applications, you may want to install some additional PHP modules that provide extra functionality and features for PHP. For example, you may want to install the mysqli module that allows you to interact with MySQL databases or the curl module that allows you to make HTTP requests.

To install additional PHP modules, run the command below:

sudo apt install php8.1-mysqli php8.1-curl php8.1-xml php8.1-mbstring

Replace php8.1 with the version of PHP that you have installed in step 5, and add or remove the modules that you want to install or uninstall.

Step 7: Restart the web server

After installing the new version of PHP and the additional modules, you need to restart the web server that is running on your system to apply the changes and load the new version of PHP. The most common web servers for Ubuntu are Apache and Nginx.

To restart the Apache web server, execute the following command:

sudo systemctl restart apache2

To restart the Nginx web server, run this one:

sudo systemctl restart nginx

Conclusion

In this tutorial, we have learned how to upgrade PHP on Ubuntu with a step-by-step guide. We have also learned what PHP is, why we may want to upgrade it, and what are the prerequisites for this task.

By upgrading PHP on Ubuntu, we can enjoy the latest features and improvements of PHP, fix bugs and security issues, and improve the performance and compatibility of our PHP applications.

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