functions-post.php

php 开发的内容管理系统

	} else {
		do_action('add_attachment', $post_ID);
	}
	
	return $post_ID;
}

function wp_delete_attachment($postid) {
	global $wpdb;
	$postid = (int) $postid;

	if ( !$post = $wpdb->get_row("SELECT * FROM $wpdb->posts WHERE ID = '$postid'") )
		return $post;

	if ( 'attachment' != $post->post_status )
		return false;

	$meta = get_post_meta($postid, '_wp_attachment_metadata', true);
	$file = get_post_meta($postid, '_wp_attached_file', true);

	$wpdb->query("DELETE FROM $wpdb->posts WHERE ID = '$postid'");

	$wpdb->query("DELETE FROM $wpdb->comments WHERE comment_post_ID = '$postid'");

	$wpdb->query("DELETE FROM $wpdb->post2cat WHERE post_id = '$postid'");

	$wpdb->query("DELETE FROM $wpdb->postmeta WHERE post_id = '$postid'");

	if ( ! empty($meta['thumb']) ) {
		// Don't delete the thumb if another attachment uses it
		if (! $foo = $wpdb->get_row("SELECT meta_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attachment_metadata' AND meta_value LIKE '%".$wpdb->escape($meta['thumb'])."%' AND post_id <> '$postid'"))
			@ unlink(str_replace(basename($file), $meta['thumb'], $file));
	}

	if ( ! empty($file) )
		@ unlink($file);

	do_action('delete_attachment', $postid);

	return $post;
}

function wp_get_single_post($postid = 0, $mode = OBJECT) {
	global $wpdb;

	$post = get_post($postid, $mode);
	
	// Set categories
	if($mode == OBJECT) {
		$post->post_category = wp_get_post_cats('',$postid);
	} 
	else {
		$post['post_category'] = wp_get_post_cats('',$postid);
	}

	return $post;
}

function wp_get_recent_posts($num = 10) {
	global $wpdb;

	// Set the limit clause, if we got a limit
	if ($num) {
		$limit = "LIMIT $num";
	}

	$sql = "SELECT * FROM $wpdb->posts WHERE post_status IN ('publish', 'draft', 'private') ORDER BY post_date DESC $limit";
	$result = $wpdb->get_results($sql,ARRAY_A);

	return $result?$result:array();
}

function wp_update_post($postarr = array()) {
	global $wpdb;

	if ( is_object($postarr) )
		$postarr = get_object_vars($postarr);

	// First, get all of the original fields
	$post = wp_get_single_post($postarr['ID'], ARRAY_A);	

	// Escape data pulled from DB.
	$post = add_magic_quotes($post);

	// Passed post category list overwrites existing category list if not empty.
 	if ( isset($postarr['post_category']) && is_array($postarr['post_category'])
			 && 0 != count($postarr['post_category']) )
 		$post_cats = $postarr['post_category'];
 	else 
 		$post_cats = $post['post_category'];

	// Drafts shouldn't be assigned a date unless explicitly done so by the user
	if ( 'draft' == $post['post_status'] && empty($postarr['edit_date']) && empty($postarr['post_date']) && 
	     ('0000-00-00 00:00:00' == $post['post_date']) )
		$clear_date = true;
	else
		$clear_date = false;

 	// Merge old and new fields with new fields overwriting old ones.
 	$postarr = array_merge($post, $postarr);
 	$postarr['post_category'] = $post_cats;	
	if ( $clear_date ) {
		$postarr['post_date'] = '';
		$postarr['post_date_gmt'] = '';
	}

	if ($postarr['post_status'] == 'attachment')
		return wp_insert_attachment($postarr);

	return wp_insert_post($postarr);
}

function wp_get_post_cats($blogid = '1', $post_ID = 0) {
	global $wpdb;
	
	$post_ID = (int) $post_ID;

	$sql = "SELECT category_id 
		FROM $wpdb->post2cat 
		WHERE post_id = '$post_ID' 
		ORDER BY category_id";

	$result = $wpdb->get_col($sql);

	if ( !$result )
		$result = array();

	return array_unique($result);
}

function wp_set_post_cats($blogid = '1', $post_ID = 0, $post_categories = array()) {
	global $wpdb;
	// If $post_categories isn't already an array, make it one:
	if (!is_array($post_categories) || 0 == count($post_categories))
		$post_categories = array(get_option('default_category'));
	
	$post_categories = array_unique($post_categories);

	// First the old categories
	$old_categories = $wpdb->get_col("
		SELECT category_id 
		FROM $wpdb->post2cat 
		WHERE post_id = $post_ID");
	
	if (!$old_categories) {
		$old_categories = array();
	} else {
		$old_categories = array_unique($old_categories);
	}

	// Delete any?
	$delete_cats = array_diff($old_categories,$post_categories);

	if ($delete_cats) {
		foreach ($delete_cats as $del) {
			$wpdb->query("
				DELETE FROM $wpdb->post2cat 
				WHERE category_id = $del 
					AND post_id = $post_ID 
				");
		}
	}

	// Add any?
	$add_cats = array_diff($post_categories, $old_categories);

	if ($add_cats) {
		foreach ($add_cats as $new_cat) {
			$wpdb->query("
				INSERT INTO $wpdb->post2cat (post_id, category_id) 
				VALUES ($post_ID, $new_cat)");
		}
	}
	
	// Update category counts.
	$all_affected_cats = array_unique(array_merge($post_categories, $old_categories));
	foreach ( $all_affected_cats as $cat_id ) {
		$count = $wpdb->get_var("SELECT COUNT(*) FROM $wpdb->post2cat, $wpdb->posts WHERE $wpdb->posts.ID=$wpdb->post2cat.post_id AND post_status='publish' AND category_id = '$cat_id'");
		$wpdb->query("UPDATE $wpdb->categories SET category_count = '$count' WHERE cat_ID = '$cat_id'");
		wp_cache_delete($cat_id, 'category');		
	}
}	// wp_set_post_cats()

function wp_delete_post($postid = 0) {
	global $wpdb, $wp_rewrite;
	$postid = (int) $postid;

	if ( !$post = $wpdb->get_row("SELECT * FROM $wpdb->posts WHERE ID = $postid") )
		return $post;

	if ( 'attachment' == $post->post_status )
		return wp_delete_attachment($postid);

	do_action('delete_post', $postid);

	if ( 'publish' == $post->post_status) {
		$categories = wp_get_post_cats('', $post->ID);
		if( is_array( $categories ) ) {
			foreach ( $categories as $cat_id ) {
				$wpdb->query("UPDATE $wpdb->categories SET category_count = category_count - 1 WHERE cat_ID = '$cat_id'");
				wp_cache_delete($cat_id, 'category');
			}
		}
	}

	if ( 'static' == $post->post_status )
		$wpdb->query("UPDATE $wpdb->posts SET post_parent = $post->post_parent WHERE post_parent = $postid AND post_status = 'static'");

	$wpdb->query("DELETE FROM $wpdb->posts WHERE ID = $postid");
	
	$wpdb->query("DELETE FROM $wpdb->comments WHERE comment_post_ID = $postid");

	$wpdb->query("DELETE FROM $wpdb->post2cat WHERE post_id = $postid");

	$wpdb->query("DELETE FROM $wpdb->postmeta WHERE post_id = $postid");

	if ( 'static' == $post->post_status ) {
		wp_cache_delete('all_page_ids', 'pages');
		$wp_rewrite->flush_rules();
	}

	return $post;
}

/**** /DB Functions ****/

/**** Misc ****/

// get permalink from post ID
function post_permalink($post_id = 0, $mode = '') { // $mode legacy
	return get_permalink($post_id);
}

// Get the name of a category from its ID
function get_cat_name($cat_id) {
	global $wpdb;
	
	$cat_id -= 0; 	// force numeric
	$name = $wpdb->get_var("SELECT cat_name FROM $wpdb->categories WHERE cat_ID=$cat_id");
	
	return $name;
}

// Get the ID of a category from its name
function get_cat_ID($cat_name='General') {
	global $wpdb;
	
	$cid = $wpdb->get_var("SELECT cat_ID FROM $wpdb->categories WHERE cat_name='$cat_name'");

	return $cid?$cid:1;	// default to cat 1
}

// Get author's preferred display name
function get_author_name( $auth_id ) {
	$authordata = get_userdata( $auth_id );

	return $authordata->display_name;
}

// get extended entry info (<!--more-->)
function get_extended($post) {
	list($main,$extended) = explode('<!--more-->', $post, 2);

	// Strip leading and trailing whitespace
	$main = preg_replace('/^[\s]*(.*)[\s]*$/','\\1',$main);
	$extended = preg_replace('/^[\s]*(.*)[\s]*$/','\\1',$extended);

	return array('main' => $main, 'extended' => $extended);
}

// do trackbacks for a list of urls
// borrowed from edit.php
// accepts a comma-separated list of trackback urls and a post id
function trackback_url_list($tb_list, $post_id) {
	if (!empty($tb_list)) {
		// get post data
		$postdata = wp_get_single_post($post_id, ARRAY_A);

		// import postdata as variables
		extract($postdata);
		
		// form an excerpt
		$excerpt = strip_tags($post_excerpt?$post_excerpt:$post_content);
		
		if (strlen($excerpt) > 255) {
			$excerpt = substr($excerpt,0,252) . '...';
		}
		
		$trackback_urls = explode(',', $tb_list);
		foreach($trackback_urls as $tb_url) {
		    $tb_url = trim($tb_url);
		    trackback($tb_url, stripslashes($post_title), $excerpt, $post_id);
		}
    }
}

function wp_blacklist_check($author, $email, $url, $comment, $user_ip, $user_agent) {
	global $wpdb;

	do_action('wp_blacklist_check', $author, $email, $url, $comment, $user_ip, $user_agent);

	if ( preg_match_all('/&#(\d+);/', $comment . $author . $url, $chars) ) {
		foreach ($chars[1] as $char) {
			// If it's an encoded char in the normal ASCII set, reject
			if ($char < 128)
				return true;
		}
	}

	$mod_keys = trim( get_settings('blacklist_keys') );
	if ('' == $mod_keys )
		return false; // If moderation keys are empty
	$words = explode("\n", $mod_keys );

	foreach ($words as $word) {
		$word = trim($word);

		// Skip empty lines
		if ( empty($word) ) { continue; }

		// Do some escaping magic so that '#' chars in the 
		// spam words don't break things:
		$word = preg_quote($word, '#');
		
		$pattern = "#$word#i"; 
		if ( preg_match($pattern, $author    ) ) return true;
		if ( preg_match($pattern, $email     ) ) return true;
		if ( preg_match($pattern, $url       ) ) return true;
		if ( preg_match($pattern, $comment   ) ) return true;
		if ( preg_match($pattern, $user_ip   ) ) return true;
		if ( preg_match($pattern, $user_agent) ) return true;
	}
	
	if ( isset($_SERVER['REMOTE_ADDR']) ) {
		if ( wp_proxy_check($_SERVER['REMOTE_ADDR']) ) return true;
	}

	return false;
}

function wp_proxy_check($ipnum) {
	if ( get_option('open_proxy_check') && isset($ipnum) ) {
		$rev_ip = implode( '.', array_reverse( explode( '.', $ipnum ) ) );