Php Comparison Operators

Comparison operators perform test  on their operands. They return the boolean value true if the 

test  is successful and return false otherwise . This type of expression is useful  in control  structures, such as if and while statements.You will meet this in Tutorial.

Ti test whether the value contained in $x is smaller than 5, for example ,you  would use the less than operator:

$x<5;

 If $x contained 2, this expression would be equivalent to the value true.If  $x contained 8  the expression would resolve to false.

 If  x =3;

Operator         Name                           Returns true if                      example                   result

= =              Equivalence          Left is equivalent to right             $x= = 5                   false

!=                Non -equivalence  Left is not equivalent to right       $x !=6                     true

= = =         Identical                   Left is equivalent to right 

                                                   and they are the same type.         $x = = = 5                false

>               Greater than            Left is greater than right               $x >5                      true

>=             Greater than             Left is greater than                      $x >=3                 true                                                                            or equal to right

<                   less than                    Left is less than right               $x<2                       false

<=               less than or equal to         Left is less than                   $x <=3                  true

                                                              or equal to right

These operators are most commonly used with integers or doubles,although the equivalence operator is also used to compare strings.