Eval

Syntax

Eval(str);

str	A string containing one or several global variables.

Description

Evaluates all global variables in the argument string.

Returns

str	A string in which all global variables have been replaced by their values. If evaluation fails an empty string is returned.

Example

$question = "life, the universe, and everything";

$answer = "42";

$result = Eval ("The answer to the question of $question is $answer");

$result will then contain

"The answer to the question of life, the universe, and everything is 42"

Example

In this example, the hexadecimal value <22> is used to insert double quotation marks in a Perl call.

$command = eval("perl -e <22>sleep 60 <22>");

execute( $command, 61 ); // sleep for 60 secs