Online PHP editor | refs for 11S72

<?php function &drupal_static($name, $default_value = NULL, $reset = FALSE) { static $data = array(), $default = array(); // First check if dealing with a previously defined static variable. if (isset($data [$name]) || array_key_exists($name, $data)) { // Non-NULL $name and both $data[$name] and $default[$name] statics exist. if ($reset) { // Reset pre-existing static variable to its default value. $data [$name] = $default [$name]; } return $data [$name]; } // Neither $data[$name] nor $default[$name] static variables exist. if (isset($name)) { if ($reset) { // Reset was called before a default is set and yet a variable must be // returned. return $data; } // First call with new non-NULL $name. Initialize a new static variable. $default [$name] = $data [$name] = $default_value; return $data [$name]; } // Reset all: ($name == NULL). This needs to be done one at a time so that // references returned by earlier invocations of drupal_static() also get // reset. foreach ($default as $name => $value) { $data [$name] = $value; } // As the function returns a reference, the return should always be a // variable. return $data; } $drupal_static_fast = &drupal_static('foo'); $missing = &$drupal_static_fast['missing']; var_dump(!isset($missing)); $missing = array(); var_dump(!isset($missing));