Try following example to understand all the comparision operators. Copy and paste following PHP program in test.php file ando keep it in your PHP Server's document root and browse it using any browser.
<html>
<head><title>Comparision 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 grater than or equal to b<br/>";
}else{
echo "TEST5 : a is nieghter 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 nieghter less than nor equal to b<br/>";
}
?>
</body>
</html>
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This will produce 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 grater than or equal to b
TEST6 : a is nieghter less than nor equal to b
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