PHP - Comparison Operators Example

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Try following example to understand all the comparison operators. Copy and paste following PHP program in test.php file and keep it in your PHP Server's document root and browse it using any browser.

Live Demo

<html>
   
   <head>
      <title>Comparison Operators</title>
   </head>
   
   <body>
      
      <?php
         $a = 42;
         $b = 20;
      
         if( $a == $b ) {
            echo "TEST1 : a is equal to b<br/>";
         }else {
            echo "TEST1 : a is not equal to b<br/>";
         }
      
         if( $a > $b ) {
            echo "TEST2 : a is greater than  b<br/>";
         }else {
            echo "TEST2 : a is not greater than b<br/>";
         }
      
         if( $a < $b ) {
            echo "TEST3 : a is less than  b<br/>";
         }else {
            echo "TEST3 : a is not less than b<br/>";
         }
      
         if( $a != $b ) {
            echo "TEST4 : a is not equal to b<br/>";
         }else {
            echo "TEST4 : a is equal to b<br/>";
         }
      
         if( $a >= $b ) {
            echo "TEST5 : a is either greater than or equal to b<br/>";
         }else {
            echo "TEST5 : a is neither greater than nor equal to b<br/>";
         }
      
         if( $a <= $b ) {
            echo "TEST6 : a is either less than or equal to b<br/>";
         }else {
            echo "TEST6 : a is neither less than nor equal to b<br/>";
         }
      ?>
      
   </body>
</html>

This will produce the following result −

TEST1 : a is not equal to b
TEST2 : a is greater than b
TEST3 : a is not less than b
TEST4 : a is not equal to b
TEST5 : a is either greater than or equal to b
TEST6 : a is neither less than nor equal to b

php_operator_types.htm