What are the commonly used operators and expressions in php?

PHP operators and expressions provide functions for performing calculations and logical operations. Operator types include arithmetic, comparison, logical, bitwise, and assignment operators. Expressions combine values, variables, operators, and function calls to compute a result, with precedence and associativity determining the order of evaluation.

Commonly used operators and expressions in PHP

PHP provides a wide range of operators and expressions. Used to perform calculations and logical operations.

Operators

• ##Arithmetic operators: , -, *, /, %, , --
• Comparison operators: ==, !=, <, >, <=, >=
• Logical operators: &&, || , !
• Bitwise operators: &, |, ^, ~
• Assignment operators: =, =, -=, *= , /=, %=
• Other operators: [], (), ., ->, ::

##expression

An expression is a structure that combines values, variables, and operators to calculate a result. Expressions can contain the following elements:

Literals:
• Numbers, strings, Boolean values ​​
Variables:
• Containers to store values
Operators:
• Functions that perform operations and comparisons
Function calls:
• Predefined or user-defined blocks of code

Example

// 算术表达式
$sum = 10 + 5;

// 比较表达式
if ($a == 10) {
  // ...
}

// 逻辑表达式
if ($x && $y) {
  // ...
}

// 赋值表达式
$total += 10;

// 函数调用表达式
$result = max(1, 2, 3);

Note:

The precedence and associativity of operators determine the order in which expressions are evaluated. Parentheses can be used explicitly to control the order of evaluation.

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