pre_$field

apply_filters('pre_$field') is found 3 times:

• /wp-includes/bookmark.php line 440

  			$value = esc_attr( $value );
  		}
  	} elseif ( 'db' === $context ) {
  		/** This filter is documented in wp-includes/post.php */
  		$value = apply_filters( "pre_{$field}", $value );
  	} else {
  		/** This filter is documented in wp-includes/post.php */
  		$value = apply_filters( "{$field}", $value, $bookmark_id, $context );
  
  		if ( 'attribute' === $context ) {
  			$value = esc_attr( $value );
  

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• /wp-includes/post.php line 3022

  			 * @since 2.3.0
  			 *
  			 * @param mixed $value Value of the post field.
  			 */
  			$value = apply_filters( "pre_{$field}", $value );
  
  			/**
  			 * Filters the value of a specific field before saving.
  			 *
  			 * Only applied to post fields with a name which is prefixed with `post_`.
  			 *
  

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• /wp-includes/user.php line 1848

  		}
  	} elseif ( 'db' === $context ) {
  		if ( $prefixed ) {
  			/** This filter is documented in wp-includes/post.php */
  			$value = apply_filters( "pre_{$field}", $value );
  		} else {
  
  			/**
  			 * Filters the value of a user field in the 'db' context.
  			 *
  			 * The dynamic portion of the hook name, `$field`, refers to the prefixed user
  

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