See your public IP address instantly with IPv4/IPv6 detection - then inspect any address for its type, range, integer forms, and reverse DNS.
Developer tool
PHP Syntax Checker
Paste PHP code and get real parse errors with line numbers - checked by an actual PHP engine, never executed. Catches smart quotes and BOM issues too.
Business or Dual plan
Included in the Business plan (from $6/month), in Dual (Personal and Business together) and in the 7-day free trial.
No payment card is needed to start the trial.
What you get
Why use PHP Syntax Checker online
Nothing to install
PHP Syntax Checker runs in a modern browser on desktop, tablet and phone. Open it in a tab and start; there is nothing to download or update.
Your work stays yours
Anything you save is stored in your account, can be exported, and is not sold.
Part of the developer toolkit
Sits alongside JSON, regex, JWT, cron and the other developer tools in the same account.
Questions
Frequently asked questions
Is PHP Syntax Checker free to use?
PHP Syntax Checker is included in the Business plan from $6/month, and in the Dual plan (Personal and Business together). Every new account starts with a 7-day free trial of every tool, and no payment card is needed to start.
Do I need to install anything to use PHP Syntax Checker?
No. PHP Syntax Checker runs in a modern browser on Windows, Mac, Linux, iPhone and Android. There is nothing to download, update or uninstall.
Is my data private when I use PHP Syntax Checker?
Anything you save is stored in your account, can be exported, and is not sold. You can download everything at any time with Export My Data.
Does PHP Syntax Checker work on my phone?
Yes. PHP Syntax Checker runs in a modern browser on desktop, tablet and phone.
What else is included with PHP Syntax Checker?
Xerion has 199 browser-based tools across 9 categories: Business, Creative, Developer, Everyday, Finance, Fun & Games, PDF, Productivity and Security. The 7-day free trial includes every one of them; after that, the plan you pick decides which are included.
Hear about new tools when they shipLeave your address and we will let you know when something new lands on Xerion.
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Get started
Try PHP Syntax Checker free for 7 days
Every new account starts with a 7-day free trial of every tool. No payment card is needed to start, and your saved work is kept whatever you decide afterwards.
Included in the Business plan (from $6/month), in Dual (Personal and Business together) and in the 7-day free trial. Already have an account? Log in.