What are some potential pitfalls of only working with the first 3 letters of a variable in PHP?

Working with only the first 3 letters of a variable in PHP can lead to potential pitfalls such as losing important information or creating ambiguity if multiple variables have similar first 3 letters. To solve this issue, consider using longer prefixes or unique identifiers to ensure each variable is distinct and easily identifiable.

// Using longer prefixes or unique identifiers to avoid ambiguity
$fullVariableName = "example";
$fullVariableNameLength = strlen($fullVariableName);