Dynamic / Ephemeral Port (49152–65535) Regex for PHP

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching dynamic / ephemeral port (49152–65535), ported and verified for PHP. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. 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
// Dynamic / Ephemeral Port (49152–65535)
// ReDoS-safe | RegexVault — Web & Network > Port

define('DYNAMIC_EPHEMERAL_PORT_4915265535_PATTERN', '/^(?:6553[0-5]|655[0-2][0-9]|65[0-4][0-9]{2}|6[0-4][0-9]{3}|5[0-9]{4}|4[9][0-9]{3})$/');

function validate_dynamic_ephemeral_port_4915265535(string $input): bool {
    return (bool) preg_match(DYNAMIC_EPHEMERAL_PORT_4915265535_PATTERN, $input);
}

// Example
var_dump(validate_dynamic_ephemeral_port_4915265535("49152")); // bool(true)

Test Cases

When to use this pattern

This pattern is drawn from the Web & Network > Port 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

Ephemeral range 49152-65535. Pattern covers 49000-65535 — validate the lower bound (>=49152) with integer comparison for precision. Linux ephemeral range (32768-60999) may differ from IANA spec.