classes/phing/tasks/system/condition/IsSetCondition.php
public function evaluate()
    {
        if ($this->property === null) {
            throw new BuildException(
                "No property specified for isset "
                . "condition"
            );
        }

        return $this->project->getProperty($this->property) !== null;
    }
public function evaluate()
    {
        if ($this->property === null) {
            throw new BuildException(
                "No property specified for isset "
                . "condition"
            );
        }

        return $this->project->getProperty($this->property) !== null;
    }
public function evaluate ( ) { if ( $ this -> property === null ) { throw new BuildException ( "No property specified for isset " . "condition" ) ; } return $ this -> project -> getProperty ( $ this -> property ) !== null ; }
Check whether property is set.

@throws BuildException
Check whether property is set .