152 lines
4.4 KiB
PHP
152 lines
4.4 KiB
PHP
<?php
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require_once('../wp-config.php');
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$debug = 0;
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/**
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** maybe_create_table()
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** Create db table if it doesn't exist.
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** Returns: true if already exists or on successful completion
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** false on error
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*/
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function maybe_create_table($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 == $table_name) {
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return true;
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}
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}
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//didn't find it try to create it.
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$q = $wpdb->query($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 == $table_name) {
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return true;
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}
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}
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return false;
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}
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/**
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** maybe_add_column()
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** Add column to db table if it doesn't exist.
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** Returns: true if already exists or on successful completion
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** false on error
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*/
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function maybe_add_column($table_name, $column_name, $create_ddl) {
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global $wpdb, $debug;
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foreach ($wpdb->get_col("DESC $table_name",0) as $column ) {
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if ($debug) echo("checking $column == $column_name<br />");
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if ($column == $column_name) {
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return true;
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}
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}
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//didn't find it try to create it.
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$q = $wpdb->query($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 == $column_name) {
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return true;
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}
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}
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return false;
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}
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/**
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** maybe_drop_column()
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** Drop column from db table if it exists.
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** Returns: true if it doesn't already exist or on successful drop
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** false on error
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*/
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function maybe_drop_column($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 == $column_name) {
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//found it try to drop it.
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$q = $wpdb->query($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 == $column_name) {
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return false;
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}
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}
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}
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}
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// else didn't find it
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return true;
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}
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/**
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** check_column()
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** Check column matches passed in criteria.
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** Pass in null to skip checking that criteria
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** Returns: true if it matches
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** false otherwise
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** (case sensitive) Column names returned from DESC table are:
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** Field
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** Type
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** Null
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** Key
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** Default
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** Extra
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*/
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function check_column($table_name, $col_name, $col_type, $is_null = null, $key = null, $default = null, $extra = null) {
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global $wpdb, $debug;
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$diffs = 0;
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$results = $wpdb->get_results("DESC $table_name");
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foreach ($results as $row ) {
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if ($debug > 1) print_r($row);
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if ($row->Field == $col_name) {
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// got our column, check the params
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if ($debug) echo ("checking $row->Type against $col_type\n");
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if (($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 ($diffs > 0) {
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if ($debug) echo ("diffs = $diffs returning false\n");
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return false;
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}
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return true;
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} // end if found our column
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}
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return false;
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}
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/*
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echo "<p>testing</p>";
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echo "<pre>";
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//check_column('wp_links', 'link_description', 'mediumtext');
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//if (check_column($wpdb->comments, 'comment_author', 'tinytext'))
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// echo "ok\n";
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$error_count = 0;
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$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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{
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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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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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echo "</pre>";
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*/
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?>
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