These functions are PHP 8.0+ but ZoneMinder is called from views on
PHP 7 installs (event.php uses str_ends_with at file scope, triggering
a fatal "Call to undefined function" before the page can render).
Add function_exists-guarded polyfills at the top of functions.php so
PHP 8+ keeps the native implementations and PHP 7.x picks up the
fallbacks. functions.php is required by index.php before any view, so
all four call sites (functions.php, event.php, views/image.php) are
covered.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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