<?php
error_reporting( E_ALL | E_DEPRECATED );

# This is the error:
Just an error

ini_set( 'display_errors', 1 );

$bar='Hallo';
$i=3;
$tok=1;

$foo = $bar{1};
$foo = $bar{ 1 };
$foo = $bar{ 1+3 };

$foo = $bar{ $tok + 3 }; $foo = $bar{$i};