PHP Math Equations

[Robert_Craig]

I am trying to create a math equation inside a variable but I am struggling to achieve the desired result.

On one php page I have this:

 $x = "date('Y')";
 $y = "1989";
 $description = "In this classic lecture which was delivered over $x - $y years ago, etc etc.....";

On my main page I have linked to the above and also $description but the result I am getting is:

In this classic lecture which was delivered over date('Y') - 1989 years ago,

 

I want to create a variable so I don't need to go back every year and change the description. Is this possible?

Robert

 

[Barand]

You can't put functions inside strings like variables.

<?php
 $x = date('Y');
 $y = 1989;
 $description = "In this classic lecture which was delivered over " . ($x - $y) . " years ago, etc etc.....";
 
 echo $description;  // ==> In this classic lecture which was delivered over 31 years ago, etc etc..... 
?>

 

[Robert_Craig]

Thank you Barand for the quick reply and easy explanation.