What are the potential consequences of not using consistent coding practices, such as omitting quotation marks in PHP output?

Omitting quotation marks in PHP output can lead to syntax errors and unexpected behavior in your code. It is important to use consistent coding practices to ensure code readability, maintainability, and to avoid potential bugs.

// Incorrect way of outputting a string without quotation marks
echo Hello World;

// Correct way of outputting a string with quotation marks
echo "Hello World";