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I found following code what is purpose of using braces around key,like this ${$key}
PHP
$expected = array( 'carModel', 'year', 'bodyStyle' );

foreach( $expected AS $key ) 
{
 if ( !empty( $_POST[ $key ] ) ) {
  ${$key} = $_POST[ $key ];
 }
 else 
 {
  ${$key} = NULL;
 }
}
Posted
Updated 4-Jul-13 20:41pm
v2

1 solution

This code is similar with
PHP
$carModel = $_POST['carModel'];
$year = $_POST['year'];
$bodyStyle = $_POST['bodyStyle'];
 
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