https://cwe.mitre.org/data/definitions/98.html The include statement takes all the text/code/markup that exists in the specified file and loads it into the memory, making it available for use. For example: `File 1 --> vars.php` `<?php` `$color = 'green';` `$fruit = 'apple';` `?>` `#############################################` `File 2 --> test.php` `<?php` `echo "A $color $fruit"; // output = "A"` `include 'vars.php';` `echo "A $color $fruit"; // output = "A green apple"` `?>`