What are the best practices for naming variables in PHP to prevent conflicts or errors?

When naming variables in PHP, it is important to follow best practices to prevent conflicts or errors. To avoid naming collisions with reserved keywords or existing variables, it is recommended to use descriptive names that clearly indicate the purpose of the variable. Additionally, using camelCase or snake_case naming conventions can improve readability and maintainability of the code. 

// Example of naming variables following best practices
$firstName = "John";
$lastName = "Doe";
$userAge = 30;

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naming conventions variable naming PHP conflicts errors

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