How can PHP developers ensure proper variable naming consistency to avoid errors?

To ensure proper variable naming consistency in PHP, developers can establish naming conventions and adhere to them consistently throughout their codebase. This helps reduce errors and makes the code more readable and maintainable. One common convention is using camelCase for variable names. 

// Example of consistent variable naming using camelCase
$firstName = "John";
$lastName = "Doe";
$age = 30;

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variable naming consistency errors PHP developers avoid

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