Inline image replacement

class-post-by-email.php

<?php
// This is right after
// if ( $attachment_count > 0 && ! has_shortcode( $post_content, 'gallery' ) ) {
// I realize now that it should actually be in a separate if that doesn't include the ! has_shortcode() condition
// 3D seems to be included when sending email via Apple Mail like so:
// src=3D"...."
preg_match_all( '/<img(.*?)src=3?D?[\'"]cid:([^"\']*)[\'"]([^<>]*)\/?>/ims', $post_content, $inline_image_matches );

if ( $inline_image_matches ) {
	$search_array = array();
	$replace_array = array();
	foreach ( $inline_image_matches[2] as $i => $cid ) {
		if ( isset( self::$image_cids[ $cid ] ) ) {
			$search_array[] = $inline_image_matches[0][ $i ];
			// self::$image_cids[ $cid ][1] is the URL to the "full" size of the image
			// self::$image_cids[ $cid ][0] is the URL to the "medium" size of the image or the "full" size if "medium" wasn't found
			// we use a filter to let other people change "medium" to another size
			$replace_array[] = '<a href="' . esc_attr( self::$image_cids[ $cid ][1] ) . '" target="_blank"><img' . $inline_image_matches[1][ $i ] . 'src="' . esc_attr( self::$image_cids[ $cid ][0] ) . '"' . $inline_image_matches[3][ $i ] . ' /></a>';
		}
	}

	$post_content = str_replace( $search_array, $replace_array, $post_content );
}