UserInput/docs/tutorial_example_01_init.php - zetacomponents - Git at Google

 <?php
 foreach ( $definition as $name => $dummy )
 {
     $propertyName = "property_$name";
     $propertyWarningName = "warning_$name";
     $$propertyName = '';
     $$propertyWarningName = '';
 }
 ?>
	<?php
	foreach ( $definition as $name => $dummy )
	{
	$propertyName = "property_$name";
	$propertyWarningName = "warning_$name";
	$$propertyName = '';
	$$propertyWarningName = '';
	}
	?>