symfony/expression-language

Health v2 · maintenance only

Adoption not part of the score

2840 stars · 45 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A Symfony PHP component providing an engine that compiles and evaluates one-line expressions with a syntax similar to PHP and Twig. It acts as a restricted sandbox for evaluating dynamic logic where raw PHP code cannot be used safely, such as in configuration, security rules, or user-editable business rules.

Use cases

• evaluate dynamic expressions in PHP safely
• build a business rule engine editable by non-developers
• define access rules in security configuration
• add conditions to validation constraints
• store discount or pricing rules in a database
• evaluate route matching conditions
• lint and parse expression strings before evaluation

When to choose

• you need to evaluate user- or admin-defined logic without executing arbitrary PHP
• you want a sandboxed expression engine with explicit variable declaration
• you are building a Symfony application and need expressions for security, validation, or routing
• you need compiled expressions for repeated fast evaluation

When to avoid

• you need a full general-purpose scripting language
• your expressions require complex multi-line logic or loops
• you are not working in PHP

Facets

library · maturity stable

parser interpreter compiler configuration-management security programming-languages web-development developer-tools php cross-platform expression-language symfony-component rule-engine sandboxed-evaluation business-rules automation

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