Online PHP editor | refs for ZVCKP

<?php $mce_init = array( 'plugins' => '', 'toolbar1' => '' ); $mce_init['plugins'] .= ',directionality'; $mce_init['toolbar1'] .= ',ltr'; // All is OK: print_r( $mce_init ); unset( $mce_init['plugins'], $mce_init['toolbar1'] ); // Triggers a warning in PHP 5.2.17: $mce_init['plugins'] .= ',directionality'; $mce_init['toolbar1'] .= ',ltr'; print_r( $mce_init ); // Should trigger the reported fatal in https://core.trac.wordpress.org/ticket/45482; $mce_init = 'string'; // '', array(), new stdClass, null, false, etc do not trigger the specific fatal. $mce_init['plugins'] .= ',directionality'; $mce_init['toolbar1'] .= ',ltr'; print_r( $mce_init );