Write and run PHP in your browser against a real interpreter. The Monaco editor gives you PHP syntax highlighting, find-and-replace, and formatting; the file explorer lets you build small multi-file scripts with require and include; and the standard-input panel feeds fgets(STDIN) so interactive scripts work too. Pick a starter template or paste your own code and see the actual interpreter output — including real notices, warnings, and fatal errors when something breaks.
Best Fit
- Try a PHP function or language feature quickly without configuring a local server.
- Reproduce a small bug across two or three files and share the exact repro.
- Run a CLI-style script that reads input and read its output inline.
How to use the PHP Compiler
- Start from an example or write your own script in the editor.
- Add files in the explorer if your script spans more than one file.
- If your code calls
fgets(STDIN), open the Input panel and add one line per read. - Press Run (or Ctrl+Enter) to execute; read the output and any diagnostics below.
- Copy the code, or download it — multi-file projects download as a zip.
What the PHP Compiler helps with
- Real PHP execution surfaces genuine notices, warnings, and fatal errors.
- Multi-file scripts with a file explorer, tabs, and search across files.
- Standard-input support so interactive CLI scripts run as intended.
- Quality-of-life editing: format, find and replace, word wrap, minimap toggle.
Examples
Hello World
Input
<?php
echo "Hello, World!\n";
Output
Hello, World!
Reading input with stdin
Input
<?php
$name = trim(fgets(STDIN));
printf("Hi %s, your name has %d letters.\n", $name, strlen($name));
Input panel:
Ada
Output
Hi Ada, your name has 3 letters.
Frequently Asked Questions
Where does my code run?
Your code is sent to the Parsepad backend, executed by a real PHP interpreter in a sandbox, and the output is returned to your browser. Unlike a purely client-side tool, running requires a network round-trip — that is what lets it report genuine interpreter diagnostics.
Can I run scripts that read input?
Yes. Open the Input panel in the status bar and enter one line for each read your script makes. The lines are fed to standard input in order when you run.
Does it support multiple files?
Yes. Use the file explorer to add .php files and pull them in with require or include. When you download a multi-file project it is packaged as a zip so the structure is preserved.
Which PHP version is used?
A current stable PHP release. Language features from recent versions generally work; long-running operations and platform-specific extensions are limited by the execution sandbox.
