3v4l.org

run code in 300+ PHP versions simultaneously
<?php if ( !defined( 'JSON_PARTIAL_OUTPUT_ON_ERROR' ) ) { define( 'JSON_PARTIAL_OUTPUT_ON_ERROR', 0 ); } $a = array(); $a[0] = 'A'; $a[1] =& $a; $a[2] = 'B'; var_dump( json_encode( array( &$a ), JSON_PARTIAL_OUTPUT_ON_ERROR ) );

preferences:
44.82 ms | 402 KiB | 5 Q