Deprecated curly braces for array and string offsets in PHP 7.4

[alex-rowe]

moodle-mod_oublog/pluginfile.php

Line 34 in 5377524

} else if ($relativepath{0} != '/') {

The following warning was shown in PHP Compatibility checks for PHP 7.4

FILE: .../mod/oublog/pluginfile.php
----------------------------------------------------------------------
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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 34 | WARNING | [x] Curly brace syntax for accessing array elements
    |         |     and string offsets has been deprecated in PHP
    |         |     7.4. Found: $relativepath{0}
    |         |     (PHPCompatibility.Syntax.RemovedCurlyBraceArrayAccess.Found)
----------------------------------------------------------------------