Operators in PHP

Operators are used to perform some operations on data operators are broadly classified into 2 categories

1. Unary operators
   An operator  that requires only one operant in unary operator.
   Ex: $a++
   in the above statement a is operant and ++ is operator
2. Binary Operator
   An operator that require two operant is called as binary operator.
   Ex: $a+$b

We have 8 types of operators in PHP those are

1. Arithmetic operators
   1. +
   2. –
   3. *
   4. /
   5. %

   <?php    
   echo(10/3)."<br>";
   
   echo(10%3)."<br>";
   echo(-10%3)."<br>";     
   echo(10%-3)."<br>";
   
   echo(-10%-3)."<br>";
   
   $a=5;
   $b="psd";    
   $c=$a+$b;      
   echo $c;      
   ?>
   the output is 
   
   3.3333333333333
   1
   -1
   1
   -1
   5

2. Assignment operators
   1. =
   2. +=
   3. -=
   4. *=
   5. /=
   6. %=
   7. .=

   <?php
   $a=($b=4)+5;
   echo $a."
   <?php
   $a=($b=4)+5;
   echo$a;
   echo$b;
   ?>
   The output is

   9
   4

3. increment and decrement Operators
   1. ++(increases value by one)
   2. –(Decrease value by one)

      <?php
            
      $x=10;      
      echo $x++."--".++$x;      
      ?>
      
            
      Output is      
      10--12

4. Relation operators
   1. <
   2. >
   3. <=
   4. >=
   5. == (will check only for content is same or not)
   6. !=
   7. <>
   8. === (will check content and type of content also)
   9. !==
5. Logical operators  (it was used to frame a compound condition)
   1. &&
   2. ||

      In case of logical operators all the expressions will not be evaluated every time . It is based on the result of first condition.(($a>$b)&&($a>$c))

       

6. Negation operators

   it used to multiply a number with “-“ operator$a=10;

   $b=-$a;

7. Error Control operators  (@)

   when prepended with an expression, any warning messages that is being generated will gets suppressed.

8. Bitwise operators

   Bit wise operators are 3 they are

   1. AND –&
   2. OR    — |
   3. XOR  — ^

      In this case bit wise operators both operant will converted to binary form and corresponding bitwise operation will be performed.

9. Shift Operators
   1. Left Shift operator (<<)
   2. Right shift operator (>>)

      In this case of shift operators the first operant will be converted to binary form and corresponding shifts will happen based on second number of operant.EX:–

      echo (100>>2);

      echo (100<<2);

      output will be

      25

      400

10. String / Concadination operator
    1. .
    2. .=
11. concadination / ternary operator
    1. ?:
12. Type operator
    1. “insaneof”
13. New Operator
    1. new
14. Scope operator
    1. ::
15. De-referencing operator
    1. ->