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<?php $allowed_html = [ 'div' => [ 'class' => true ], ]; $elem = 'DIV'; var_dump( ( ! isset( $allowed_html[ $elem ] ) ) ); var_dump( ( ! isset( $allowed_html[ strtolower( $elem ) ] ) ) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.15, 8.4.1 - 8.4.2
bool(true) bool(false)
preferences:
125.87 ms | 406 KiB | 5 Q