Created
July 21, 2021 18:08
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When you need to know what filter is changing your content, try adding this to wp-includes/class-wp-hook.php
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| <?php | |
| /** | |
| * Calls the callback functions that have been added to a filter hook. | |
| * | |
| * @since 4.7.0 | |
| * | |
| * @param mixed $value The value to filter. | |
| * @param array $args Additional parameters to pass to the callback functions. | |
| * This array is expected to include $value at index 0. | |
| * @return mixed The filtered value after all hooked functions are applied to it. | |
| */ | |
| public function apply_filters( $value, $args ) { | |
| if ( ! $this->callbacks ) { | |
| return $value; | |
| } | |
| $nesting_level = $this->nesting_level++; | |
| $this->iterations[ $nesting_level ] = array_keys( $this->callbacks ); | |
| $num_args = count( $args ); | |
| do { | |
| $this->current_priority[ $nesting_level ] = current( $this->iterations[ $nesting_level ] ); | |
| $priority = $this->current_priority[ $nesting_level ]; | |
| foreach ( $this->callbacks[ $priority ] as $the_ ) { | |
| if ( ! $this->doing_action ) { | |
| $args[0] = $value; | |
| } | |
| // Add this: | |
| if ( doing_filter( 'filter_to_test' ) ) { | |
| echo "\nStarting with: "; | |
| var_export( $value ); | |
| echo "\n"; | |
| } | |
| // Avoid the array_slice() if possible. | |
| if ( 0 == $the_['accepted_args'] ) { | |
| $value = call_user_func( $the_['function'] ); | |
| } elseif ( $the_['accepted_args'] >= $num_args ) { | |
| $value = call_user_func_array( $the_['function'], $args ); | |
| } else { | |
| $value = call_user_func_array( $the_['function'], array_slice( $args, 0, (int) $the_['accepted_args'] ) ); | |
| } | |
| // And this: | |
| if ( doing_filter( 'filter_to_test' ) ) { | |
| echo "\nFunction: "; | |
| var_export( $the_['function'] ); | |
| echo "\nReturned: "; | |
| var_export( $value ); | |
| echo "\n"; | |
| } | |
| } | |
| } while ( false !== next( $this->iterations[ $nesting_level ] ) ); | |
| unset( $this->iterations[ $nesting_level ] ); | |
| unset( $this->current_priority[ $nesting_level ] ); | |
| $this->nesting_level--; | |
| return $value; | |
| } |
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