format_to_edit( string $content, bool $rich_text = false )

对即将编辑的文本执行操作。
Acts on text which is about to be edited.

目录锚点：#说明#参数#返回#源码#笔记

说明（Description）

$content通过escu textarea（）运行，它使用htmlspecialchars（）将特殊字符转换为HTML实体。如果$richedit设置为true，则它只是“format_to_edit”筛选器的持有者。

参数（Parameters）

返回（Return）

（string）运行筛选器（可能还有htmlspecialchars（string））之后的文本。

源码（Source）

/**
 * Acts on text which is about to be edited.
 *
 * The $content is run through esc_textarea(), which uses htmlspecialchars()
 * to convert special characters to HTML entities. If $richedit is set to true,
 * it is simply a holder for the 'format_to_edit' filter.
 *
 * @since 0.71
 *
 * @param string $content  The text about to be edited.
 * @param bool   $richedit Whether the $content should not pass through htmlspecialchars(). Default false (meaning it will be passed).
 * @return string The text after the filter (and possibly htmlspecialchars()) has been run.
 */
function format_to_edit( $content, $richedit = false ) {
	/**
	 * Filter the text to be formatted for editing.
	 *
	 * @since 1.2.0
	 *
	 * @param string $content The text, prior to formatting for editing.
	 */
	$content = apply_filters( 'format_to_edit', $content );
	if ( ! $richedit )
		$content = esc_textarea( $content );
	return $content;
}

笔记（Notes）

$richedit应该在第一段中$rich_文本。