PHP Operator Types | PHP Tutorial pdf

What is Operator? Simple answer can be given using expression 4 + 5 is equal to 9. Here 4 and 5 are called operands and + is called operator. PHP language supports following type of operators.
=> Arithmetic Operators
=> Comparision Operators
=> Logical (or Relational) Operators
=> Assignment Operators
=> Conditional (or ternary) Operators
Lets have a look on all operators one by one.

Arithmatic Operators:

There are following arithmatic operators supported by PHP language:
Assume variable A holds 10 and variable B holds 20 then:
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Comparison Operators:

There are following comparison operators supported by PHP language
Assume variable A holds 10 and variable B holds 20 then:
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Logical Operators:

There are following logical operators supported by PHP language
Assume variable A holds 10 and variable B holds 20 then:
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Assignment Operators:

There are following assignment operators supported by PHP language:
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Conditional Operator

There is one more operator called conditional operator. This first evaluates an expression for a true or false value and then execute one of the two given statements depending upon the result of the evaluation. The conditional operator has this syntax:
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Operators Categories:
All the operators we have discussed above can be categorised into following categories:
=> Unary prefix operators, which precede a single operand.
=> Binary operators, which take two operands and perform a variety of arithmetic and logical operations.
=> The conditional operator (a ternary operator), which takes three operands and evaluates either the second or third expression, depending on the evaluation of the first expression.
=> Assignment operators, which assign a value to a variable.

Precedence of PHP Operators:

Operator precedence determines the grouping of terms in an expression. This affects how an expression is evaluated. Certain operators have higher precedence than others; for example, the multiplication operator has higher precedence than the addition operator:
For example x = 7 + 3 * 2; Here x is assigned 13, not 20 because operator * has higher precedence than + so it first get multiplied with 3*2 and then adds into 7.
Here operators with the highest precedence appear at the top of the table, those with the lowest appear at the bottom. Within an expression, higher precedence operators will be evaluated first.