PHP Code Checker

Detect common syntax errors and structure issues in your PHP code

PHP Tool

A quick structural check for PHP snippets

Nothing wastes time like uploading a script and getting a white page because of one forgotten semicolon or brace. This checker gives you a fast first pass: paste the code, click a button and see whether anything looks structurally off. It is meant for small snippets and quick sanity checks, not as a replacement for PHP itself.

Running a check

Paste your code into the PHP Source box. Load Sample inserts a broken example, and Clear empties the field.
Click Check Syntax.
A result card appears. A green card titled Syntax Looks Good means none of the checks fired; a red card titled Potential Issues Found lists each problem as a bullet.

Editing the text hides the previous result, so what you see always matches the code in the box.

What the tool looks at

Opening tag: it reports when the text does not contain the string <?php.
Semicolons: every non-empty line that does not end in a semicolon, an opening or closing brace or a colon, and does not start like a comment, is reported with its line number as a possible missing semicolon.
Brace balance: it counts curly braces and tells you how many are open versus closed when the numbers differ.

Expect false alarms and misses

These are pattern checks, not a parser, so read the messages as hints. Lines that legitimately end in a comma, an opening parenthesis, a closing parenthesis, a closing PHP tag or the end of a docblock line will be flagged. Multi-line arrays and chained method calls are common causes. On the other side, the checker does not verify parentheses, quotes, variable names, function calls or types, and it counts braces even when they sit inside strings or comments. A green result therefore does not prove that the script will run.

Good moments to use it

Scanning a snippet pasted from a tutorial before dropping it into a project.
Spotting an unclosed function or if block in a short script.
Teaching beginners which kinds of mistakes cause parse errors.
Confirming you did not forget the opening tag when saving a fragment to a file.

For a definitive answer, run php -l filename.php in a terminal or let your editor's PHP tooling analyse the file. The checker works in your browser with JavaScript, so it never executes your code.

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Frequently Asked Questions

Does this tool run or execute my PHP code?

No. It only applies text-pattern checks in your browser and never interprets or runs the script. That makes it safe to paste an untested snippet, but it also means it cannot catch runtime errors or deep syntax problems.

Why is a correct line flagged as missing a semicolon?

The check flags any line that does not end in a semicolon, brace or colon. Lines ending in a comma or parenthesis, a closing PHP tag, or docblock lines starting with an asterisk are therefore reported even though they are valid. Treat it as a hint.

What does Brace mismatch mean?

The number of opening curly braces differs from the number of closing ones. It usually points to an unclosed function, loop or if block. Braces inside strings and comments are counted as well, so check those if the message seems wrong.

Can it verify parentheses, quotes or variable names?

No. It only checks for the opening tag, possible missing semicolons and brace balance. Unclosed quotes, unbalanced parentheses and undefined variables are not detected, so a passing result does not guarantee the code will run.

What should I use for a reliable syntax check?

Use php -l on the command line, which runs PHP's own parser, or the analysis built into your editor. Static tools like PHPStan add deeper checks. This page is best as a quick first look at a small snippet.