Environment Variable Regex Pattern

Live Regex Tester

Pattern Breakdown

Code Examples

const regex = /^[A-Z][A-Z0-9_]*=.+$/gm;
const test = "DATABASE_URL=postgres://localhost";
console.log(regex.test(test)); // true

// Extract matches
const matches = test.match(regex);
console.log(matches);

import re

pattern = r'^[A-Z][A-Z0-9_]*=.+$'
test = "DATABASE_URL=postgres://localhost"
match = re.findall(pattern, test)
print(match)  # Found!

package main

import (
    "fmt"
    "regexp"
)

func main() {
    re := regexp.MustCompile(`^[A-Z][A-Z0-9_]*=.+$`)
    fmt.Println(re.MatchString("DATABASE_URL=postgres://localhost")) // true
}

Common Use Cases

Match Examples

About the Environment Variable Regex

Matches environment variable assignments in KEY=VALUE format with uppercase keys and underscores.

Regular expressions (regex) are powerful pattern matching tools used across virtually all programming languages. The environment variable pattern is classified as beginner difficulty in the code & programming category. It works in all major programming languages.

When using this regex, always consider edge cases and test thoroughly with real-world data. Use the interactive tester above to validate the pattern against your specific inputs before deploying to production.

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