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* logIO() and the global $xmlrpc_logging in XML-RPC. * log_app() and the global $app_logging in APP. * debug_fwrite(), debug_fopen(), debug_fclose(), and $debug. see #20051. git-svn-id: http://svn.automattic.com/wordpress/trunk@19935 1a063a9b-81f0-0310-95a4-ce76da25c4cd
199 lines
5.5 KiB
PHP
199 lines
5.5 KiB
PHP
<?php
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/**
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* Plugins may load this file to gain access to special helper functions for
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* plugin installation. This file is not included by WordPress and it is
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* recommended, to prevent fatal errors, that this file is included using
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* require_once().
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*
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* These functions are not optimized for speed, but they should only be used
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* once in a while, so speed shouldn't be a concern. If it is and you are
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* needing to use these functions a lot, you might experience time outs. If you
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* do, then it is advised to just write the SQL code yourself.
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*
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* <code>
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* check_column('wp_links', 'link_description', 'mediumtext');
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* if (check_column($wpdb->comments, 'comment_author', 'tinytext'))
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* echo "ok\n";
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*
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* $error_count = 0;
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* $tablename = $wpdb->links;
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* // check the column
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* if (!check_column($wpdb->links, 'link_description', 'varchar(255)')) {
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* $ddl = "ALTER TABLE $wpdb->links MODIFY COLUMN link_description varchar(255) NOT NULL DEFAULT '' ";
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* $q = $wpdb->query($ddl);
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* }
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*
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* if (check_column($wpdb->links, 'link_description', 'varchar(255)')) {
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* $res .= $tablename . ' - ok <br />';
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* } else {
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* $res .= 'There was a problem with ' . $tablename . '<br />';
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* ++$error_count;
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* }
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* </code>
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*
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* @package WordPress
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* @subpackage Plugin
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*/
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/** Load WordPress Bootstrap */
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require_once(dirname(dirname(__FILE__)).'/wp-load.php');
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if ( ! function_exists('maybe_create_table') ) :
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/**
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* Create database table, if it doesn't already exist.
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*
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* @since 1.0.0
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* @package WordPress
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* @subpackage Plugin
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* @uses $wpdb
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*
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* @param string $table_name Database table name.
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* @param string $create_ddl Create database table SQL.
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* @return bool False on error, true if already exists or success.
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*/
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function maybe_create_table($table_name, $create_ddl) {
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global $wpdb;
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foreach ($wpdb->get_col("SHOW TABLES",0) as $table ) {
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if ($table == $table_name) {
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return true;
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}
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}
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//didn't find it try to create it.
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$wpdb->query($create_ddl);
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// we cannot directly tell that whether this succeeded!
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foreach ($wpdb->get_col("SHOW TABLES",0) as $table ) {
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if ($table == $table_name) {
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return true;
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}
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}
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return false;
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}
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endif;
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if ( ! function_exists('maybe_add_column') ) :
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/**
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* Add column to database table, if column doesn't already exist in table.
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*
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* @since 1.0.0
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* @package WordPress
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* @subpackage Plugin
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* @uses $wpdb
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*
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* @param string $table_name Database table name
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* @param string $column_name Table column name
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* @param string $create_ddl SQL to add column to table.
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* @return bool False on failure. True, if already exists or was successful.
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*/
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function maybe_add_column($table_name, $column_name, $create_ddl) {
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global $wpdb;
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foreach ($wpdb->get_col("DESC $table_name",0) as $column ) {
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if ($column == $column_name) {
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return true;
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}
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}
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//didn't find it try to create it.
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$wpdb->query($create_ddl);
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// we cannot directly tell that whether this succeeded!
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foreach ($wpdb->get_col("DESC $table_name",0) as $column ) {
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if ($column == $column_name) {
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return true;
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}
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}
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return false;
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}
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endif;
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/**
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* Drop column from database table, if it exists.
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*
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* @since 1.0.0
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* @package WordPress
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* @subpackage Plugin
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* @uses $wpdb
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*
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* @param string $table_name Table name
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* @param string $column_name Column name
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* @param string $drop_ddl SQL statement to drop column.
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* @return bool False on failure, true on success or doesn't exist.
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*/
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function maybe_drop_column($table_name, $column_name, $drop_ddl) {
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global $wpdb;
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foreach ($wpdb->get_col("DESC $table_name",0) as $column ) {
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if ($column == $column_name) {
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//found it try to drop it.
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$wpdb->query($drop_ddl);
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// we cannot directly tell that whether this succeeded!
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foreach ($wpdb->get_col("DESC $table_name",0) as $column ) {
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if ($column == $column_name) {
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return false;
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}
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}
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}
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}
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// else didn't find it
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return true;
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}
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/**
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* Check column matches criteria.
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*
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* Uses the SQL DESC for retrieving the table info for the column. It will help
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* understand the parameters, if you do more research on what column information
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* is returned by the SQL statement. Pass in null to skip checking that
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* criteria.
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*
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* Column names returned from DESC table are case sensitive and are listed:
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* Field
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* Type
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* Null
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* Key
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* Default
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* Extra
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*
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* @since 1.0.0
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* @package WordPress
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* @subpackage Plugin
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*
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* @param string $table_name Table name
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* @param string $col_name Column name
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* @param string $col_type Column type
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* @param bool $is_null Optional. Check is null.
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* @param mixed $key Optional. Key info.
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* @param mixed $default Optional. Default value.
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* @param mixed $extra Optional. Extra value.
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* @return bool True, if matches. False, if not matching.
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*/
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function check_column($table_name, $col_name, $col_type, $is_null = null, $key = null, $default = null, $extra = null) {
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global $wpdb;
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$diffs = 0;
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$results = $wpdb->get_results("DESC $table_name");
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foreach ($results as $row ) {
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if ($row->Field == $col_name) {
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// got our column, check the params
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if (($col_type != null) && ($row->Type != $col_type)) {
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++$diffs;
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}
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if (($is_null != null) && ($row->Null != $is_null)) {
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++$diffs;
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}
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if (($key != null) && ($row->Key != $key)) {
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++$diffs;
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}
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if (($default != null) && ($row->Default != $default)) {
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++$diffs;
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}
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if (($extra != null) && ($row->Extra != $extra)) {
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++$diffs;
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}
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if ($diffs > 0) {
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return false;
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}
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return true;
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} // end if found our column
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}
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return false;
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}
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