## C.50. `$world->ispermanent`

Abstract

$world->ispermanent function: checks wheter a variable IS PERMANENT

`$return = $world->ispermanent(` | `var` `)`;

This function tests if a variable is permanent. The return value is true or false depending on the variable's status.

The names of the variables are passed as a string, including the `$`, `@` or `%` prefix. Be careful to use single quotes (or `\` inside double quotes) to avoid variable interpolation.