Error : [] operator not supported for strings

[conner_bw]

This function:

function wp_kses_post( $data ) {
        return wp_kses( $data, 'post' );
}

​https://github.com/WordPress/wordpress-develop/blob/169f2a432dcb000ccee0d14c50b76a62218115b3/src/wp-includes/kses.php#L1575

Doesn't work because the second parameter is a string but wp_kses() expects an array.

 * @param string $string            Content to filter through kses
 * @param array  $allowed_html      List of allowed HTML elements
 * @param array  $allowed_protocols Optional. Allowed protocol in links.
 * @return string Filtered content with only allowed HTML elements
 */
function wp_kses( $string, $allowed_html, $allowed_protocols = array() ) {

​https://github.com/WordPress/wordpress-develop/blob/169f2a432dcb000ccee0d14c50b76a62218115b3/src/wp-includes/kses.php#L526

We get:

Error : [] operator not supported for strings
 /tmp/wordpress/wp-includes/plugin.php:195
 /tmp/wordpress/wp-includes/kses.php:688
 /tmp/wordpress/wp-includes/kses.php:531
 /tmp/wordpress/wp-includes/kses.php:1576

[conner_bw]

No bug.

Unit test out of order, didn't init $wp_current_filter correctly.