Uncovering PHP operators: exploring their inner mysteries

This article written by php editor Apple will unveil the PHP operators and take you to explore their inner mysteries. In the programming world, operators are the basis for implementing various calculations and operations. Being proficient in the use of operators is crucial to writing efficient PHP code. This article will analyze the commonly used operator types in PHP, analyze their usage and characteristics, help readers better understand and use operators in PHP, and improve programming skills.

Arithmetic operators are used to perform basic mathematical operations. These operators include:

• Add(): Add two operands.
• Subtraction (-): Subtract the second operand from the first operand.
• Multiplication (*): Multiply two operands.
• Division (/): Divide the first operand by the second operand, the result is a floating point number.
• Modulus (%): Returns the remainder of the first operand divided by the second operand.
• Power operation (**): Raise the first operand to the power of the second operand.

Assignment operator

Assignment operator is used to assign a value to a variable. These operators include:

• Simple assignment (=): assign the value of the right operand to the left variable.
• Additional assignment (=): Add the value of the right-hand operand to the current value of the left-hand variable, and then assign the result to the left-hand variable.
• Subtractive assignment (-=): Subtract the value of the right-hand operand from the current value of the left-hand variable, and then assign the result to the left-hand variable.
• Multiplicative assignment (*=): Multiply the value of the right-hand operand by the current value of the left-hand variable, and then assign the result to the left-hand variable.
• Division assignment (/=): Divide the current value of the left-hand variable by the value of the right-hand operand, and then assign the result to the left-hand variable.

Comparison operators

Comparison operators are used to compare two operands and return a Boolean value. These operators include:

• Equal (==): If the two operands are equal, return true, otherwise return false.
• Not equal to (!=): If the two operands are not equal, return true, otherwise return false.
• Less than (<): If the first operand is less than the second operand, return true, otherwise return false.
• Greater than (>): If the first operand is greater than the second operand, return true, otherwise return false.
• Less than or equal (<=): If the first operand is less than or equal to the second operand, return true, otherwise return false.
• Greater than or equal to (>=): If the first operand is greater than or equal to the second operand, returns true, otherwise returns false.

Logical Operators

Logical operators are used to combine Boolean values ​​together and return a Boolean value. These operators include:

• And (&&): If both operands are true, return true, otherwise return false.
• Or (||): If either of the two operands is true, return true, otherwise return false.
• Not (!): Negate the Boolean value of the operand.

Bitwise operators

Bitwise operators operate on individual bits in integers. These operators include:

• Bitwise AND (&): AND the bits of the two operands together bit by bit.
• Bitwise OR (|): OR the bits of the two operands bit by bit.
• Bitwise XOR (^): XOR the bits of the two operands.
• Displacement (>> and <<): Shift the bits of the operand to the left or right.

Other operators

In addition to these main categories of operators, PHP also provides some other useful operators:

• Autoincrement(): Increment the operand by 1.
• Decrement (--): Decrement the operand by 1.
• Condition (?:): Return one of two values ​​​​based on the conditional expression.
• Null coalescing (??): If the first operand is false or null, return the second operand, otherwise return the first operand.

Understanding the precedence of operators

Different types of operators have different priorities, which determines the order in which they are executed. php Use the following priority order:

1. Parents
2. Self-increment and self-decrement
3. Unary operator
4. Multiplication, division and modulus
5. Addition and subtraction
6. Compare
7. Logical AND (&&)
8. Logical OR (||)
9. condition(?:)
10. Assignment

in conclusion

PHP operators are the core of the programming language, and they provide a powerful way to manipulate data and perform calculations. By understanding the inner workings of these operators, we can write more efficient and maintainable PHP code.

The above is the detailed content of Uncovering PHP operators: exploring their inner mysteries. For more information, please follow other related articles on the PHP Chinese website!