https://www.bairesdev.com/tools/phpcodechecker/
PHP Code Checker - Syntax Check for Common PHP Mistakes
An advanced, custom PHP code checker that searches your code for common, hard to find typos and mistakes; includes a syntax check.
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https://extendsclass.com/python-tester.html
Python Code Checker - Online syntax check
Online tool for checking your Python syntax. It detects any syntax errors in your script.
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https://www.stefanjudis.com/today-i-learned/how-to-quickly-perform-a-syntax-check-of-a-javascript-file/
How to quickly perform a syntax check of a JavaScript file | Stefan Judis Web Development
Jan 21, 2022 - The `--check` flag of the Node.js executable can be used to quickly check JavaScript files for syntax errors without executing them.
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https://perldoc.perl.org/podchecker
podchecker - check the syntax of POD format documentation files - Perldoc Browser
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https://superluigibros.com/http:/www.superluigibros.com
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server...