admin-functions.php

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function update_meta($mid, $mkey, $mvalue) {
	global $wpdb;

	return $wpdb->query("UPDATE $wpdb->postmeta SET meta_key = '$mkey', meta_value = '$mvalue' WHERE meta_id = '$mid'");
}

function touch_time($edit = 1, $for_post = 1) {
	global $month, $post, $comment;

	if ( $for_post )
		$edit = ( ('draft' == $post->post_status) && (!$post->post_date || '0000-00-00 00:00:00' == $post->post_date) ) ? false : true;
 
	echo '<fieldset><legend><input type="checkbox" class="checkbox" name="edit_date" value="1" id="timestamp" /> <label for="timestamp">'.__('Edit timestamp').'</label></legend>';

	$time_adj = time() + (get_settings('gmt_offset') * 3600);
	$post_date = ($for_post) ? $post->post_date : $comment->comment_date;
	$jj = ($edit) ? mysql2date('d', $post_date) : gmdate('d', $time_adj);
	$mm = ($edit) ? mysql2date('m', $post_date) : gmdate('m', $time_adj);
	$aa = ($edit) ? mysql2date('Y', $post_date) : gmdate('Y', $time_adj);
	$hh = ($edit) ? mysql2date('H', $post_date) : gmdate('H', $time_adj);
	$mn = ($edit) ? mysql2date('i', $post_date) : gmdate('i', $time_adj);
	$ss = ($edit) ? mysql2date('s', $post_date) : gmdate('s', $time_adj);

	echo "<select name=\"mm\">\n";
	for ($i = 1; $i < 13; $i = $i +1) {
		echo "\t\t\t<option value=\"$i\"";
		if ($i == $mm)
			echo " selected='selected'";
		if ($i < 10) {
			$ii = "0".$i;
		} else {
			$ii = "$i";
		}
		echo ">".$month["$ii"]."</option>\n";
	}
?>
</select>
<input type="text" id="jj" name="jj" value="<?php echo $jj; ?>" size="2" maxlength="2" />
<input type="text" id="aa" name="aa" value="<?php echo $aa ?>" size="4" maxlength="5" /> @ 
<input type="text" id="hh" name="hh" value="<?php echo $hh ?>" size="2" maxlength="2" /> : 
<input type="text" id="mn" name="mn" value="<?php echo $mn ?>" size="2" maxlength="2" /> 
<input type="hidden" id="ss" name="ss" value="<?php echo $ss ?>" size="2" maxlength="2" /> 
<?php
	if ( $edit ) {
		_e('Existing timestamp');
		echo ": {$month[$mm]} $jj, $aa @ $hh:$mn";
	}
?>
</fieldset>
	<?php

}

// insert_with_markers: Owen Winkler, fixed by Eric Anderson
// Inserts an array of strings into a file (.htaccess), placing it between
// BEGIN and END markers.  Replaces existing marked info.  Retains surrounding
// data.  Creates file if none exists.
// Returns true on write success, false on failure.
function insert_with_markers($filename, $marker, $insertion) {
	if (!file_exists($filename) || is_writeable($filename)) {
		if (!file_exists($filename)) {
			$markerdata = '';
		} else {
			$markerdata = explode("\n", implode('', file($filename)));
		}

		$f = fopen($filename, 'w');
		$foundit = false;
		if ($markerdata) {
			$state = true;
			foreach ($markerdata as $markerline) {
				if (strstr($markerline, "# BEGIN {$marker}"))
					$state = false;
				if ($state)
					fwrite($f, "{$markerline}\n");
				if (strstr($markerline, "# END {$marker}")) {
					fwrite($f, "# BEGIN {$marker}\n");
					if (is_array($insertion))
						foreach ($insertion as $insertline)
							fwrite($f, "{$insertline}\n");
					fwrite($f, "# END {$marker}\n");
					$state = true;
					$foundit = true;
				}
			}
		}
		if (!$foundit) {
			fwrite($f, "# BEGIN {$marker}\n");
			foreach ($insertion as $insertline)
				fwrite($f, "{$insertline}\n");
			fwrite($f, "# END {$marker}\n");
		}
		fclose($f);
		return true;
	} else {
		return false;
	}
}

// extract_from_markers: Owen Winkler
// Returns an array of strings from a file (.htaccess) from between BEGIN
// and END markers.
function extract_from_markers($filename, $marker) {
	$result = array ();

	if (!file_exists($filename)) {
		return $result;
	}

	if ($markerdata = explode("\n", implode('', file($filename))));
	{
		$state = false;
		foreach ($markerdata as $markerline) {
			if (strstr($markerline, "# END {$marker}"))
				$state = false;
			if ($state)
				$result[] = $markerline;
			if (strstr($markerline, "# BEGIN {$marker}"))
				$state = true;
		}
	}

	return $result;
}

function got_mod_rewrite() {
	global $is_apache;

	// take 3 educated guesses as to whether or not mod_rewrite is available
	if ( !$is_apache )
		return false;

	if ( function_exists('apache_get_modules') ) {
		if ( !in_array('mod_rewrite', apache_get_modules()) )
			return false;
	}

	return true;
}

function save_mod_rewrite_rules() {
	global $is_apache, $wp_rewrite;
	$home_path = get_home_path();

	if (!$wp_rewrite->using_mod_rewrite_permalinks())
		return;

	if (!((!file_exists($home_path.'.htaccess') && is_writable($home_path)) || is_writable($home_path.'.htaccess')))
		return;

	if (! got_mod_rewrite())
		return;

	$rules = explode("\n", $wp_rewrite->mod_rewrite_rules());
	insert_with_markers($home_path.'.htaccess', 'WordPress', $rules);
}

function the_quicktags() {
	// Browser detection sucks, but until Safari supports the JS needed for this to work people just assume it's a bug in WP
	if (!strstr($_SERVER['HTTP_USER_AGENT'], 'Safari'))
		echo '
		<div id="quicktags">
			<script src="../wp-includes/js/quicktags.js" type="text/javascript"></script>
			<script type="text/javascript">if ( typeof tinyMCE == "undefined" || tinyMCE.configs.length < 1 ) edToolbar();</script>
		</div>
';
	else echo '
<script type="text/javascript">
function edInsertContent(myField, myValue) {
	//IE support
	if (document.selection) {
		myField.focus();
		sel = document.selection.createRange();
		sel.text = myValue;
		myField.focus();
	}
	//MOZILLA/NETSCAPE support
	else if (myField.selectionStart || myField.selectionStart == "0") {
		var startPos = myField.selectionStart;
		var endPos = myField.selectionEnd;
		myField.value = myField.value.substring(0, startPos)
		              + myValue 
                      + myField.value.substring(endPos, myField.value.length);
		myField.focus();
		myField.selectionStart = startPos + myValue.length;
		myField.selectionEnd = startPos + myValue.length;
	} else {
		myField.value += myValue;
		myField.focus();
	}
}
</script>
';
}

function validate_current_theme() {
	$theme_loc = 'wp-content/themes';
	$theme_root = ABSPATH.$theme_loc;

	$template = get_settings('template');
	$stylesheet = get_settings('stylesheet');

	if (($template != 'default') && (!file_exists("$theme_root/$template/index.php"))) {
		update_option('template', 'default');
		update_option('stylesheet', 'default');
		do_action('switch_theme', 'Default');
		return false;
	}

	if (($stylesheet != 'default') && (!file_exists("$theme_root/$stylesheet/style.css"))) {
		update_option('template', 'default');
		update_option('stylesheet', 'default');
		do_action('switch_theme', 'Default');
		return false;
	}

	return true;
}

function get_broken_themes() {
	global $wp_broken_themes;

	get_themes();
	return $wp_broken_themes;
}

function get_page_templates() {
	$themes = get_themes();
	$theme = get_current_theme();
	$templates = $themes[$theme]['Template Files'];
	$page_templates = array ();

	if (is_array($templates)) {
		foreach ($templates as $template) {
			$template_data = implode('', file(ABSPATH.$template));
			preg_match("|Template Name:(.*)|i", $template_data, $name);
			preg_match("|Description:(.*)|i", $template_data, $description);

			$name = $name[1];
			$description = $description[1];

			if (!empty ($name)) {
				$page_templates[trim($name)] = basename($template);
			}
		}
	}

	return $page_templates;
}

function page_template_dropdown($default = '') {
	$templates = get_page_templates();
	foreach (array_keys($templates) as $template)
		: if ($default == $templates[$template])
			$selected = " selected='selected'";
		else
			$selected = '';
	echo "\n\t<option value='".$templates[$template]."' $selected>$template</option>";
	endforeach;
}

function parent_dropdown($default = 0, $parent = 0, $level = 0) {
	global $wpdb, $post_ID;
	$items = $wpdb->get_results("SELECT ID, post_parent, post_title FROM $wpdb->posts WHERE post_parent = $parent AND post_status = 'static' ORDER BY menu_order");

	if ($items) {
		foreach ($items as $item) {
			// A page cannot be it's own parent.
			if (!empty ($post_ID)) {
				if ($item->ID == $post_ID) {
					continue;
				}
			}
			$pad = str_repeat('&nbsp;', $level * 3);
			if ($item->ID == $default)
				$current = ' selected="selected"';
			else
				$current = '';

			echo "\n\t<option value='$item->ID'$current>$pad $item->post_title</option>";
			parent_dropdown($default, $item->ID, $level +1);
		}
	} else {
		return false;
	}
}

function user_can_access_admin_page() {
	global $pagenow;
	global $menu;
	global $submenu;
	global $plugin_page;

	$parent = get_admin_page_parent();

	foreach ($menu as $menu_array) {
		//echo "parent array: " . $menu_array[2];
		if ($menu_array[2] == $parent) {
			if (!current_user_can($menu_array[1])) {
				return false;
			} else {
				break;
			}
		}
	}

	if (isset ($submenu[$parent])) {
		if ( isset($plugin_page) ) {
			foreach ($submenu[$parent] as $submenu_array) {
				if ( $submenu_array[2] == $plugin_page ) {
					if (!current_user_can($submenu_array[1]))
						return false;
				}
			}
		}

		foreach ($submenu[$parent] as $submenu_array) {		
			if ($submenu_array[2] == $pagenow) {
				if (!current_user_can($submenu_array[1]))
					return false;
				else
					return true;
			}
		}
	}

	return true;
}

function get_admin_page_title() {
	global $title;
	global $menu;
	global $submenu;
	global $pagenow;
	global $plugin_page;

	if (isset ($title) && !empty ($title)) {
		return $title;
	}

	$hook = get_plugin_page_hook($plugin_page, $pagenow);

	$parent = $parent1 = get_admin_page_parent();
	if (empty ($parent)) {
		foreach ($menu as $menu_array) {
			if (isset ($menu_array[3])) {
				if ($menu_array[2] == $pagenow) {
					$title = $menu_array[3];
					return $menu_array[3];
				} else
					if (isset ($plugin_page) && ($plugin_page == $menu_array[2]) && ($hook == $menu_array[3])) {
						$title = $menu_array[3];
						return $menu_array[3];
					}
			}
		}
	} else {
		foreach (array_keys($submenu) as $parent) {
			foreach ($submenu[$parent] as $submenu_array) {
				if (isset ($submenu_array[3])) {
					if ($submenu_array[2] == $pagenow) {
						$title = $submenu_array[3];
						return $submenu_array[3];
					} else
						if (isset ($plugin_page) && ($plugin_page == $submenu_array[2]) && (($parent == $pagenow) || ($parent == $plugin_page) || ($plugin_page == $hook) || (($pagenow == 'admin.php') && ($parent1 != $submenu_array[2])))) {
							$title = $submenu_array[3];
							return $submenu_array[3];
						}
				}
			}
		}
	}

	return '';
}

function get_admin_page_parent() {
	global $parent_file;
	global $menu;
	global $submenu;
	global $pagenow;
	global $plugin_page;

	if (isset ($parent_file) && !empty ($parent_file)) {
		return $parent_file;
	}

	if ($pagenow == 'admin.php' && isset ($plugin_page)) {
		foreach ($menu as $parent_menu) {
			if ($parent_menu[2] == $plugin_page) {
				$parent_file = $plugin_page;
				return $plugin_page;
			}
		}
	}

	foreach (array_keys($submenu) as $parent) {
		foreach ($submenu[$parent] as $submenu_array) {
			if ($submenu_array[2] == $pagenow) {
				$parent_file = $parent;
				return $parent;
			} else
				if (isset ($plugin_page) && ($plugin_page == $submenu_array[2])) {
					$parent_file = $parent;
					return $parent;
				}
		}
	}

	$parent_file = '';
	return '';
}

function add_menu_page($page_title, $menu_title, $access_level, $file, $function = '') {
	global $menu, $admin_page_hooks;

	$file = plugin_basename($file);

	$menu[] = array ($menu_title, $access_level, $file, $page_title);

	$admin_page_hooks[$file] = sanitize_title($menu_title);

	$hookname = get_plugin_page_hookname($file, '');
	if (!empty ($function) && !empty ($hookname))
		add_action($hookname, $function);

	return $hookname;
}

function add_submenu_page($parent, $page_title, $menu_title, $access_level, $file, $function = '') {
	global $submenu;
	global $menu;

	$parent = plugin_basename($parent);
	$file = plugin_basename($file);

	// If the parent doesn't already have a submenu, add a link to the parent
	// as the first item in the submenu.  If the submenu file is the same as the
	// parent file someone is trying to link back to the parent manually.  In
	// this case, don't automatically add a link back to avoid duplication.
	if (!isset ($submenu[$parent]) && $file != $parent) {
		foreach ($menu as $parent_menu) {
			if ($parent_menu[2] == $parent) {
				$submenu[$parent][] = $parent_menu;
			}
		}
	}

	$submenu[$parent][] = array ($menu_title, $access_level, $file, $page_title);

	$hookname = get_plugin_page_hookname($file, $parent);
	if (!empty ($function) && !empty ($hookname))
		add_action($hookname, $function);

	return $hookname;
}

function add_options_page($page_title, $menu_title, $access_level, $file, $function = '') {
	return add_submenu_page('options-general.php', $page_title, $menu_title, $access_level, $file, $function);
}

function add_management_page($page_title, $menu_title, $access_level, $file, $function = '') {
	return add_submenu_page('edit.php', $page_title, $menu_title, $access_level, $file, $function);
}