mysql.dbi.lib.php

简介：一个用PHP编写的

<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * Interface to the classic MySQL extension
 *
 * @version $Id: mysql.dbi.lib.php 11335 2008-06-21 14:01:54Z lem9 $
 */
if (! defined('PHPMYADMIN')) {
    exit;
}

/**
 *
 */
// MySQL client API
if (!defined('PMA_MYSQL_CLIENT_API')) {
    if (function_exists('mysql_get_client_info')) {
        $client_api = explode('.', mysql_get_client_info());
        define('PMA_MYSQL_CLIENT_API', (int)sprintf('%d%02d%02d', $client_api[0], $client_api[1], intval($client_api[2])));
        unset($client_api);
    } else {
        define('PMA_MYSQL_CLIENT_API', 32332); // always expect the worst...
    }
}

function PMA_DBI_real_connect($server, $user, $password, $client_flags) {
    global $cfg;

    if (empty($client_flags)) {
        if ($cfg['PersistentConnections']) {
            $link = @mysql_pconnect($server, $user, $password);
        } else {
            $link = @mysql_connect($server, $user, $password);
        }
    } else {
        if ($cfg['PersistentConnections']) {
            $link = @mysql_pconnect($server, $user, $password, $client_flags);
        } else {
            $link = @mysql_connect($server, $user, $password, FALSE, $client_flags);
        }
    }

    return $link;
}

function PMA_DBI_connect($user, $password, $is_controluser = FALSE) {
    global $cfg, $php_errormsg;

    $server_port   = (empty($cfg['Server']['port']))
                   ? ''
                   : ':' . $cfg['Server']['port'];

    if (strtolower($cfg['Server']['connect_type']) == 'tcp') {
        $cfg['Server']['socket'] = '';
    }

    $server_socket = (empty($cfg['Server']['socket']))
                   ? ''
                   : ':' . $cfg['Server']['socket'];

    $client_flags = 0;

    if (PMA_PHP_INT_VERSION >= 40300 && PMA_MYSQL_CLIENT_API >= 32349) {
        // always use CLIENT_LOCAL_FILES as defined in mysql_com.h
        // for the case where the client library was not compiled
        // with --enable-local-infile
        $client_flags |= 128;
    }

    /* Optionally compress connection */
    if (defined('MYSQL_CLIENT_COMPRESS') && $cfg['Server']['compress']) {
        $client_flags |= MYSQL_CLIENT_COMPRESS;
    }

    /* Optionally enable SSL */
    if (defined('MYSQL_CLIENT_SSL') && $cfg['Server']['ssl']) {
        $client_flags |= MYSQL_CLIENT_SSL;
    }

    $link = PMA_DBI_real_connect($cfg['Server']['host'] . $server_port . $server_socket, $user, $password, empty($client_flags) ? NULL : $client_flags);

    // Retry with empty password if we're allowed to
    if (empty($link) && $cfg['Server']['nopassword'] && !$is_controluser) {
        $link = PMA_DBI_real_connect($cfg['Server']['host'] . $server_port . $server_socket, $user, '', empty($client_flags) ? NULL : $client_flags);
    }

    if (empty($link)) {
        if ($is_controluser) {
            if (! defined('PMA_DBI_CONNECT_FAILED_CONTROLUSER')) {
                define('PMA_DBI_CONNECT_FAILED_CONTROLUSER', true);
            }
            return false;
        }
        PMA_auth_fails();
    } // end if

    PMA_DBI_postConnect($link, $is_controluser);

    return $link;
}

function PMA_DBI_select_db($dbname, $link = null) {
    if (empty($link)) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return FALSE;
        }
    }
    if (PMA_MYSQL_INT_VERSION < 40100) {
        $dbname = PMA_convert_charset($dbname);
    }
    return mysql_select_db($dbname, $link);
}

function PMA_DBI_try_query($query, $link = null, $options = 0) {
    if (empty($link)) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return FALSE;
        }
    }
    if (defined('PMA_MYSQL_INT_VERSION') && PMA_MYSQL_INT_VERSION < 40100) {
        $query = PMA_convert_charset($query);
    }
    if ($options == ($options | PMA_DBI_QUERY_STORE)) {
        return @mysql_query($query, $link);
    } elseif ($options == ($options | PMA_DBI_QUERY_UNBUFFERED)) {
        return @mysql_unbuffered_query($query, $link);
    } else {
        return @mysql_query($query, $link);
    }
}

// The following function is meant for internal use only.
// Do not call it from outside this library!
function PMA_mysql_fetch_array($result, $type = FALSE) {
    global $cfg, $allow_recoding, $charset, $convcharset;

    if ($type != FALSE) {
        $data = mysql_fetch_array($result, $type);
    } else {
        $data = mysql_fetch_array($result);
    }

    /* No data returned => do not touch it */
    if (! $data) {
        return $data;
    }

    if (!defined('PMA_MYSQL_INT_VERSION') || PMA_MYSQL_INT_VERSION >= 40100
        || !(isset($cfg['AllowAnywhereRecoding']) && $cfg['AllowAnywhereRecoding'] && $allow_recoding)) {
        /* No recoding -> return data as we got them */
        return $data;
    } else {
        $ret = array();
        $num = mysql_num_fields($result);
        $i = 0;
        for ($i = 0; $i < $num; $i++) {
            $name = mysql_field_name($result, $i);
            $flags = mysql_field_flags($result, $i);
            /* Field is BINARY (either marked manually, or it is BLOB) => do not convert it */
            if (stristr($flags, 'BINARY')) {
                if (isset($data[$i])) {
                    $ret[$i] = $data[$i];
                }
                if (isset($data[$name])) {
                    $ret[PMA_convert_display_charset($name)] = $data[$name];
                }
            } else {
                if (isset($data[$i])) {
                    $ret[$i] = PMA_convert_display_charset($data[$i]);
                }
                if (isset($data[$name])) {
                    $ret[PMA_convert_display_charset($name)] = PMA_convert_display_charset($data[$name]);
                }
            }
        }
        return $ret;
    }
}

function PMA_DBI_fetch_array($result) {
    return PMA_mysql_fetch_array($result);
}

function PMA_DBI_fetch_assoc($result) {
    return PMA_mysql_fetch_array($result, MYSQL_ASSOC);
}

function PMA_DBI_fetch_row($result) {
    return PMA_mysql_fetch_array($result, MYSQL_NUM);
}

/**
 * Frees the memory associated with the results
 *
 * @param result    $result,...     one or more mysql result resources
 */
function PMA_DBI_free_result() {
    foreach (func_get_args() as $result) {
        if (is_resource($result)
         && get_resource_type($result) === 'mysql result') {
            mysql_free_result($result);
        }
    }
}

/**
 * Returns a string representing the type of connection used
 * @uses    mysql_get_host_info()
 * @uses    $GLOBALS['userlink']    as default for $link
 * @param   resource        $link   mysql link
 * @return  string          type of connection used
 */
function PMA_DBI_get_host_info($link = null)
{
    if (null === $link) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return false;
        }
    }
    return mysql_get_host_info($link);
}

/**
 * Returns the version of the MySQL protocol used
 * @uses    mysql_get_proto_info()
 * @uses    $GLOBALS['userlink']    as default for $link
 * @param   resource        $link   mysql link
 * @return  integer         version of the MySQL protocol used
 */
function PMA_DBI_get_proto_info($link = null)
{
    if (null === $link) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return false;
        }
    }
    return mysql_get_proto_info($link);
}

/**
 * returns a string that represents the client library version
 * @uses    mysql_get_client_info()
 * @return  string          MySQL client library version
 */
function PMA_DBI_get_client_info() {
    return mysql_get_client_info();
}

/**
 * returns last error message or false if no errors occured
 *
 * @uses    PMA_MYSQL_INT_VERSION
 * @uses    PMA_convert_display_charset()
 * @uses    PMA_DBI_convert_message()
 * @uses    $GLOBALS['errno']
 * @uses    $GLOBALS['userlink']
 * @uses    $GLOBALS['strServerNotResponding']
 * @uses    $GLOBALS['strSocketProblem']
 * @uses    mysql_errno()
 * @uses    mysql_error()
 * @uses    defined()
 * @param   resource        $link   mysql link
 * @return  string|boolean  $error or false
 */
function PMA_DBI_getError($link = null)
{
    $GLOBALS['errno'] = 0;
    if (null === $link && isset($GLOBALS['userlink'])) {
        $link =& $GLOBALS['userlink'];

// Do not stop now. On the initial connection, we don't have a $link,
// we don't have a $GLOBALS['userlink'], but we can catch the error code
//    } else {
//            return FALSE;
    }

    if (null !== $link) {
        $error_number = mysql_errno($link);
        $error_message = mysql_error($link);
    } else {
        $error_number = mysql_errno();
        $error_message = mysql_error();
    }
    if (0 == $error_number) {
        return false;
    }

    // keep the error number for further check after the call to PMA_DBI_getError()
    $GLOBALS['errno'] = $error_number;

    if (! empty($error_message)) {
        $error_message = PMA_DBI_convert_message($error_message);
    }

    // Some errors messages cannot be obtained by mysql_error()
    if ($error_number == 2002) {
        $error = '#' . ((string) $error_number) . ' - ' . $GLOBALS['strServerNotResponding'] . ' ' . $GLOBALS['strSocketProblem'];
    } elseif ($error_number == 2003) {
        $error = '#' . ((string) $error_number) . ' - ' . $GLOBALS['strServerNotResponding'];
    } elseif (defined('PMA_MYSQL_INT_VERSION') && PMA_MYSQL_INT_VERSION >= 40100) {
        $error = '#' . ((string) $error_number) . ' - ' . $error_message;
    } else {
        $error = '#' . ((string) $error_number) . ' - ' . PMA_convert_display_charset($error_message);
    }
    return $error;
}

function PMA_DBI_close($link = null)
{
    if (empty($link)) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return FALSE;
        }
    }
    return @mysql_close($link);
}

function PMA_DBI_num_rows($result) {
    if (!is_bool($result)) {
        return mysql_num_rows($result);
    } else {
        return 0;
    }
}

function PMA_DBI_insert_id($link = null)
{
    if (empty($link)) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return FALSE;
        }
    }
    //$insert_id = mysql_insert_id($link);
    // if the primary key is BIGINT we get an incorrect result
    // (sometimes negative, sometimes positive)
    // and in the present function we don't know if the PK is BIGINT
    // so better play safe and use LAST_INSERT_ID()
    //
    // by the way, no problem with mysqli_insert_id()
    return PMA_DBI_fetch_value('SELECT LAST_INSERT_ID();', 0, 0, $link);
}

function PMA_DBI_affected_rows($link = null)
{
    if (empty($link)) {
        if (isset($GLOBALS['userlink'])) {
            $link = $GLOBALS['userlink'];
        } else {
            return FALSE;
        }
    }
    return mysql_affected_rows($link);
}

/**
 * @todo add missing keys like in from mysqli_query (orgname, orgtable, flags, decimals)
 */
function PMA_DBI_get_fields_meta($result) {
    $fields       = array();
    $num_fields   = mysql_num_fields($result);
    for ($i = 0; $i < $num_fields; $i++) {
        $fields[] = PMA_convert_display_charset(mysql_fetch_field($result, $i));
    }
    return $fields;
}

function PMA_DBI_num_fields($result) {
    return mysql_num_fields($result);
}

function PMA_DBI_field_len($result, $i) {
    return mysql_field_len($result, $i);
}

function PMA_DBI_field_name($result, $i) {
    return mysql_field_name($result, $i);
}

function PMA_DBI_field_flags($result, $i) {
    return PMA_convert_display_charset(mysql_field_flags($result, $i));
}

?>