Runtime Configuration

The behaviour of these functions is affected by
settings in php.ini.

For further details and definitions of the PHP_INI_* modes, see the
Where a
configuration setting may be set.

Here’s a short explanation of the configuration
directives.

runkit.superglobal string

Comma-separated list of variable names to
be treated as superglobals. This value should be set in the
systemwide php.ini file, but may work in perdir configuration
contexts depending on your SAPI.

Example #1 Custom Superglobals with
runkit.superglobal=_FOO,_BAR in php.ini

<?php
function show_values() {
  echo "Foo is $_FOO\n";
  echo "Bar is $_BAR\n";
  echo "Baz is $_BAZ\n";
}

$_FOO = 'foo';
$_BAR = 'bar';
$_BAZ = 'baz';

/* Displays foo and bar, but not baz */
show_values();
?>

runkit.internal_override boolean

Enables ability to modify/rename/remove
internal functions.