Operators in PHP---arithmetic operators, logical operators, assignment operators, comparison operators

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Release: 2016-07-28 08:25:27
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1. Arithmetic operators

                                                  

Operation typeInversion operationAddition operationSubtraction operation Multiplication operation Return $ The quotient of a and $b$a % $breturns the remainder of $a and $b                                                                                                                                       out out out out Operation typeLogical AND
Operator Example Result
- -$a Returns the negative value of $a
+ $a + $b Return $a with The sum of $b
- $a - $b Returns the difference between $a and $b
+ remainder operation %
2. logic Operators
Operator Example Result

&& or and

$a && $b or $a and $b

When both $a and $b are true, return true, otherwise return falseWhen $a or $b is true, return true, otherwise return falseWhen $a is true $b is false or $a is false $b is true, return true, otherwise return false The assignment operator "=" is the most basic in PHP Operator, that is, assign the value of the expression on the right side of "=" to the operand on the left. Curber +=
logical or | | or or $a || $b or $a or $b
logical exclusive OR xor $a xor $b
logical not ! !$a When $a is false, return true, otherwise return false
3. Assignment operator In addition, the compound assignment operator is also commonly used in PHP.值 赋 Composite assignment operator Computing type
Example Results Add method

$a += 5

$a plus 5 and assign to $a 5 The difference is assigned to $a. The product of $a multiplied by 5 is assigned to $a.

Division assignment

/=%=

4. Comparison operator

$a /= 5 $a divided by 5 is assigned the quotient of $a Take the remainder and assign
$a %= 5 $a divided by 5, the remainder is assigned to $a
When the value of $a is greater than the value of $b, then return true, otherwise return falseWhen the value of $a is less than or equal to the value of $b, it returns true, otherwise it returns false When the value of $a is greater than or equal to the value of $b, it returns true, otherwise it returns false When$ If the value of a is equal to the value of $b, return true, otherwise return false When the value of $a is equal to the value of $b, and The types of $a and $b are also equal, then return true, otherwise return false when $a If the value is equal to the value of $b, return false, otherwise return true When the value of $a is equal to the value of $b, and $a The type of $b is also equal, then false is returned, otherwise true is returned The above has introduced the operators in PHP---arithmetic operators, logical operators, assignment operators, comparison operators, including relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.
Operation type operator Example The result
is less than <$a < $bWhen the value of $a is less than $b $b
less than or equal to <=$a <= $b
greater than or equal to >= $a >= $b
Equal == $a == $b
Congruent === $a === $b
not equal != $a != $b or $a <> $b
not equal !== $a !== $b
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