Rules

Syntax:

// Valid variable name $myVariable; // Valid variable name starting with an underscore $_myVariable; // Valid variable name using underscores $my_variable; // Valid variable name with numbers $myVariable123; // Valid variable name starting with an underscore and numbers $_123Variable; // Valid variable name, but different from $myVariable (case-sensitive) $MyVariable;...

Rules:

Valid Characters: Variables can comprise letters (a-z, A-Z), numbers (0-9), and underscores (_). They must commence with a letter or underscore, not a number. Case Sensitivity: PHP variable names are case-sensitive. For instance, $variableName and $VariableName are considered distinct. Avoid Reserved Keywords: Refrain from using PHP-reserved keywords such as if, else, for, etc., as variable names, as they serve specific purposes in the language. Descriptive and Meaningful: Opt for descriptive and meaningful names that convey the purpose or content of the variable. Utilize camelCase or snake_case conventions for multi-word variable names, maintaining consistency within your code. Clear and Concise: Keep variable names concise while ensuring they accurately represent the data they store or the functionality they support....