More on PHP Programming

1. Finding the variable name by value

<?php
function var_name(&$var, $scope=0)
{
    $key = array_search($var, $GLOBALS);
    return $key;
}
$name = 'samy';
echo var_name($name);
?>
 O/P

name

Above code will works for only  unique variable used for the page. finding the variable name by value with multiple variable name in a same page use following function

<?php
echo vname($inp);
function vname(&$var, $scope=false, $prefix='unique', $suffix='value')
  {
    if($scope) $vals = $scope;
    else      $vals = $GLOBALS;
    $old = $var;
    $var = $new = $prefix.rand().$suffix;
    $vname = FALSE;
    foreach($vals as $key => $val) {
      if($val === $new) $vname = $key;
    }
    $var = $old;
    return $vname;
  }
?>

 O/P
name