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Diffstat (limited to 'www/crm/wp-admin/install-helper.php')
-rw-r--r-- | www/crm/wp-admin/install-helper.php | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/www/crm/wp-admin/install-helper.php b/www/crm/wp-admin/install-helper.php new file mode 100644 index 00000000..c13f3027 --- /dev/null +++ b/www/crm/wp-admin/install-helper.php @@ -0,0 +1,200 @@ +<?php +/** + * Plugins may load this file to gain access to special helper functions for + * plugin installation. This file is not included by WordPress and it is + * recommended, to prevent fatal errors, that this file is included using + * require_once(). + * + * These functions are not optimized for speed, but they should only be used + * once in a while, so speed shouldn't be a concern. If it is and you are + * needing to use these functions a lot, you might experience time outs. If you + * do, then it is advised to just write the SQL code yourself. + * + * check_column( 'wp_links', 'link_description', 'mediumtext' ); + * if ( check_column( $wpdb->comments, 'comment_author', 'tinytext' ) ) { + * echo "ok\n"; + * } + * + * $error_count = 0; + * $tablename = $wpdb->links; + * // Check the column. + * if ( ! check_column($wpdb->links, 'link_description', 'varchar( 255 )' ) ) { + * $ddl = "ALTER TABLE $wpdb->links MODIFY COLUMN link_description varchar(255) NOT NULL DEFAULT '' "; + * $q = $wpdb->query( $ddl ); + * } + * + * if ( check_column( $wpdb->links, 'link_description', 'varchar( 255 )' ) ) { + * $res .= $tablename . ' - ok <br />'; + * } else { + * $res .= 'There was a problem with ' . $tablename . '<br />'; + * ++$error_count; + * } + * + * @package WordPress + * @subpackage Plugin + */ + +/** Load WordPress Bootstrap */ +require_once( dirname( dirname( __FILE__ ) ) . '/wp-load.php' ); + +if ( ! function_exists( 'maybe_create_table' ) ) : + /** + * Create database table, if it doesn't already exist. + * + * @since 1.0.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param string $table_name Database table name. + * @param string $create_ddl Create database table SQL. + * @return bool False on error, true if already exists or success. + */ + function maybe_create_table( $table_name, $create_ddl ) { + global $wpdb; + foreach ( $wpdb->get_col( 'SHOW TABLES', 0 ) as $table ) { + if ( $table == $table_name ) { + return true; + } + } + // Didn't find it, so try to create it. + $wpdb->query( $create_ddl ); + + // We cannot directly tell that whether this succeeded! + foreach ( $wpdb->get_col( 'SHOW TABLES', 0 ) as $table ) { + if ( $table == $table_name ) { + return true; + } + } + return false; + } +endif; + +if ( ! function_exists( 'maybe_add_column' ) ) : + /** + * Add column to database table, if column doesn't already exist in table. + * + * @since 1.0.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param string $table_name Database table name + * @param string $column_name Table column name + * @param string $create_ddl SQL to add column to table. + * @return bool False on failure. True, if already exists or was successful. + */ + function maybe_add_column( $table_name, $column_name, $create_ddl ) { + global $wpdb; + foreach ( $wpdb->get_col( "DESC $table_name", 0 ) as $column ) { + + if ( $column == $column_name ) { + return true; + } + } + + // Didn't find it, so try to create it. + $wpdb->query( $create_ddl ); + + // We cannot directly tell that whether this succeeded! + foreach ( $wpdb->get_col( "DESC $table_name", 0 ) as $column ) { + if ( $column == $column_name ) { + return true; + } + } + return false; + } +endif; + +/** + * Drop column from database table, if it exists. + * + * @since 1.0.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param string $table_name Table name + * @param string $column_name Column name + * @param string $drop_ddl SQL statement to drop column. + * @return bool False on failure, true on success or doesn't exist. + */ +function maybe_drop_column( $table_name, $column_name, $drop_ddl ) { + global $wpdb; + foreach ( $wpdb->get_col( "DESC $table_name", 0 ) as $column ) { + if ( $column == $column_name ) { + + // Found it, so try to drop it. + $wpdb->query( $drop_ddl ); + + // We cannot directly tell that whether this succeeded! + foreach ( $wpdb->get_col( "DESC $table_name", 0 ) as $column ) { + if ( $column == $column_name ) { + return false; + } + } + } + } + // Else didn't find it. + return true; +} + +/** + * Check column matches criteria. + * + * Uses the SQL DESC for retrieving the table info for the column. It will help + * understand the parameters, if you do more research on what column information + * is returned by the SQL statement. Pass in null to skip checking that + * criteria. + * + * Column names returned from DESC table are case sensitive and are listed: + * Field + * Type + * Null + * Key + * Default + * Extra + * + * @since 1.0.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * + * @param string $table_name Table name + * @param string $col_name Column name + * @param string $col_type Column type + * @param bool $is_null Optional. Check is null. + * @param mixed $key Optional. Key info. + * @param mixed $default Optional. Default value. + * @param mixed $extra Optional. Extra value. + * @return bool True, if matches. False, if not matching. + */ +function check_column( $table_name, $col_name, $col_type, $is_null = null, $key = null, $default = null, $extra = null ) { + global $wpdb; + $diffs = 0; + $results = $wpdb->get_results( "DESC $table_name" ); + + foreach ( $results as $row ) { + + if ( $row->Field == $col_name ) { + + // Got our column, check the params. + if ( ( $col_type != null ) && ( $row->Type != $col_type ) ) { + ++$diffs; + } + if ( ( $is_null != null ) && ( $row->Null != $is_null ) ) { + ++$diffs; + } + if ( ( $key != null ) && ( $row->Key != $key ) ) { + ++$diffs; + } + if ( ( $default != null ) && ( $row->Default != $default ) ) { + ++$diffs; + } + if ( ( $extra != null ) && ( $row->Extra != $extra ) ) { + ++$diffs; + } + if ( $diffs > 0 ) { + return false; + } + return true; + } // end if found our column + } + return false; +} |