Does any tool that helps to upgrade legacy 5.4 codebase to modern 8.x exist?

This page summarizes the projects mentioned and recommended in the original post on /r/PHP
Composer Repositories Code Analysis PHP Ast instant-upgrades

InfluxDB - Power Real-Time Data Analytics at Scale
Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
www.influxdata.com
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SaaSHub - Software Alternatives and Reviews
SaaSHub helps you find the best software and product alternatives
www.saashub.com
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  • Rector

    Instant Upgrades and Automated Refactoring of any PHP 5.3+ code

    • Never used it .. but something like this perhaps might help ... https://github.com/rectorphp/rector

  • php7mar

    Discontinued PHP 7 Migration Assistant Report (MAR)

    • PHP7 migration assistant (pma) to get you from 5.x to 7.x first https://github.com/Alexia/php7mar

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

    InfluxDB logo
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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