Conditional Statements in PHP - Formula Sheet

Key Operational Syntaxes and Logic Rules

While PHP conditional statements do not utilize mathematical formulas in the traditional sense, they are governed by rigid logical expressions and syntactical rules.

1. Conditional Syntax Formulas

2. Logical and Comparison Evaluation Rules

Conditions are evaluated using standard boolean logic:

• Equal Comparison (\(x == \)y): Returns true if the values of the two operands are equivalent, performing automatic type conversion if necessary.
• Identical Comparison (\(x === \)y): Returns true only if both the value and the data type of the two operands are strictly identical.
• Logical AND (C1 && C2): Evaluates to true only if both condition 1 and condition 2 are simultaneously true.
• Logical OR (C1 || C2): Evaluates to true if at least one of the conditions is true.
• Logical NOT (!C): Negates the boolean value of condition C (turns true to false and vice versa).