Summary of operators in php

 < =  ==  ===  
 *
 *    三元运算符  1 ? 2 : 3
 *
 *   $a = 10;
 *
 *    算术运算符号  + - * / % ++ --
 *    赋值运算符号  = += -= *= /= %=
 *    比较运算符号  > < == >= <= === != !== 
 *    逻辑运算符号  && || ! 
 *    位运算符号    &  | ^  ~  >> << 
 *
 *    其它运算符号   ? :   @    => -> 
 *
 */
 ?>

•An operator is something that takes one or more given values ​​(an expression, in programming jargon) and produces another value (thus the entire structure becomes an expression). So think of functions or any structure that returns a value (like print) as operators, and those that don't return a value (like echo) as something else.

•There are three types of operators:

– Unary operators that operate on only one value, such as ! (the negation operator) or ++ (the addition operator).

– Binary operator, with two operands, most operators supported by PHP are of this type.

–Ternary operator: ? :.

It should be used to choose one expression between two other expressions, not to choose between two statements or program routes. It's a good idea to enclose the entire ternary expression in an expansion sign.

Operators in PHP

1. Arithmetic operators

## Common arithmetic operations Symbol

Operation typeOperatorExampleResultInversion operation--$aReturn the negative value of $aAddition operation+$a + $bReturns the sum of $a and $bSubtraction operation-$a - $bReturn $a and $ Difference of bMultiplication operation*$a * $b##Division operationRemainder operation

		##Returns the product of $a and $b
/	$a / $b	Returns the quotient of $a and $b
%	##$a % $b	Return the remainder of $a and $b	2. Logical operators Logical operators in PHP ##Operation typeOperatorExampleResultLogical and&& or and$a && $b or $a and $bWhen both $a and $b are true, return true, otherwise return falseLogical or|| or or$a || $b or $a or $bWhen $a or $b is When true, return true, otherwise return falseLogical XORxor$a xor $bWhen $a is true, $b is false or $a is false, $b is true, return true, otherwise return falselogical negation! ##!$a When $a is false, return true, otherwise return false 3. Assignment operator The assignment operator "=" is the most basic operator in PHP, which assigns the value of the expression on the right side of "=" to the operand on the left. In addition, the compound assignment operator is also commonly used in PHP.                                                                       Operator Example##$a += 5Subtractive assignment-=$a -= 5Multiplication assignment*=$a *= 5Division assignment/=$a /= 5The remainder is assigned% =$a %= 5 Result Addition assignment += $a adds 5 and assigns the sum to $a $a minus 5 is assigned to $a The product of $a times 5 is assigned to $a The quotient of $a divided by 5 is assigned to $a # The remainder of $a divided by 5 is assigned to $a 4. Comparison operators ##is less than040897171c6303a7dfeaaa07230d7d17$a > $bwhen $a If the value is greater than the value of $b, it returns true, otherwise it returns false is less than or equal to 1798a003a606b970d231704318bd41bf=$a >= $bWhen the value of $a is greater than or equal to the value of $b, return true, otherwise return false##EqualCongruentNot equal Not equal Operation type Operator Example Result == $a == $b When the value of $a is equal to the value of $b, it returns true, otherwise it returns false === $a === $b When the value of $a is equal to the value of $b, and the value of $a and $b If the types are also equal, return true, otherwise return false != $a != $b or $a 6d267e5fab17ea8bc578f9e7e5e1570b $b When the value of $a is equal to the value of $b, it returns false, otherwise it returns true !== $a !== $b When the value of $a is equal to the value of $b, and the types of $a and $b are also equal, return false, otherwise return true

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