Street Address (US Format) Regex for PHP

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching street address (us format), ported and verified for PHP. Identity and credential patterns need both correctness and safety, since they're frequent targets for adversarial input. The snippet below is ready to drop into your PHP project — whether you're validating in a Laravel validator, a WordPress plugin, or a standalone PHP script.

Php Implementation

<?php
// Street Address (US Format)
// ReDoS-safe | RegexVault — Identity & PII > Location PII

define('STREET_ADDRESS_US_FORMAT_PATTERN', '/^[0-9]{1,6}(?:\s+(?:apt|unit|ste|suite|#)\s*[A-Za-z0-9]+)?\s+[A-Za-z0-9\s.\'-]{3,50}(?:\s+(?:ave|avenue|blvd|boulevard|ct|cir|dr|drive|hwy|highway|ln|lane|pkwy|parkway|pl|place|rd|road|st|street|ter|terrace|trl|trail|way))?\.?$/');

function validate_street_address_us_format(string $input): bool {
    return (bool) preg_match(STREET_ADDRESS_US_FORMAT_PATTERN, $input);
}

// Example
var_dump(validate_street_address_us_format("123 Main St")); // bool(true)

Test Cases

When to use this pattern

This pattern is drawn from the Identity & PII > Location PII category and carries a ReDoS-safe certification. That matters for PHP developers because especially relevant in PHP where PCRE backtracking limits can trigger silent failures on malicious input. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

US addresses are extremely varied — this pattern covers the most common format but not all. PO Boxes, rural routes, and military addresses require different patterns. Use a dedicated address validation API (USPS, SmartyStreets) for reliable validation.