WordPress Docx - apply_filters - Testing when no callbacks are registered.
add_filter( 'knowthecode', function( $value ){ | |
d( 'in the filter knowthecode ' . $value ); | |
}, 52 ); | |
add_action( 'loop_start', __NAMESPACE__ . '\demo_no_callbacks' ); | |
function demo_no_callbacks() { | |
echo 'in demo_no_callbacks<br>'; | |
global $wp_filter; | |
d( $wp_filter['knowthecode'] ); | |
remove_all_filters( 'knowthecode' ); | |
d( $wp_filter['knowthecode'] ); | |
d( array_key_exists( 'knowthecode', $wp_filter ) ); | |
$value = apply_filters( 'knowthecode', 'Hello there' ); | |
echo 'back from apply_filters'; | |
d( $value ); | |
} |
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