PHP Syntax Checker

Check the syntax of PHP code

Features

No execution environment needed

Check syntax just by pasting, without installing PHP

Show errors by line

Check the line numbers with errors and the error details in a list

Inline display in the code field

Show error messages directly on the relevant line in the editor

Try instantly with samples

Insert two kinds of code, valid and erroneous, with one click

How to Use

Enter the PHP code

Paste or type the PHP code you want to check in the input field

Run the check

Press the run button or Ctrl/Cmd+Enter to start the syntax check

Check the error locations

If there are errors, the line number and details are shown; otherwise it shows no problems

Use Cases

Preventing mistakes before deployment

Find syntax mistakes before pushing to the server to avoid production errors

Checking while learning PHP

Instantly check whether your code is syntactically correct without a local environment

Verifying edited code

Inspect edited code for new syntax errors before applying it

Pre-checking received code

Check the syntactic validity of code received from outside before adopting it

Basic Knowledge

Difference Between Syntax Errors and Runtime Errors

Syntax errors are mistakes in how code is written, such as missing semicolons or mismatched brackets, and can be detected mechanically before execution. Runtime errors, on the other hand, occur during execution, such as calling undefined functions or failing to read files, and are not caught by syntax checking.

How to Read Parse Errors

PHP syntax errors are reported in the form "Parse error: syntax error, unexpected 〜". The line number shown indicates where the error was detected, but the actual cause often lies before that line, such as a missing semicolon or unclosed bracket on the previous line.