X-Git-Url: https://delta.frontaccounting.com/gitweb/?a=blobdiff_plain;f=admin%2Fdb%2Fmaintenance_db.inc;h=40bf751f78e0a26de56b1c2ac8aea0339ed5b2c3;hb=77d649c6b45f760018b94a857b25af91b51bf99b;hp=0a710e34a409e032db4153bbaab5dc78fb12fba9;hpb=4def49c9e0be02ccdf814188c2a72ebd969a7a98;p=fa-stable.git diff --git a/admin/db/maintenance_db.inc b/admin/db/maintenance_db.inc index 0a710e34..40bf751f 100644 --- a/admin/db/maintenance_db.inc +++ b/admin/db/maintenance_db.inc @@ -1,48 +1,96 @@ . +***********************************************************************/ + +/** + * @return Returns the array sorted as required + * @param $aryData Array containing data to sort + * @param $strIndex name of column to use as an index + * @param $strSortBy Column to sort the array by + * @param $strSortType String containing either asc or desc [default to asc] + * @desc Naturally sorts an array using by the column $strSortBy + */ +define('EXPORT_MAX_INSERT', 50000); + +function array_natsort($aryData, $strIndex, $strSortBy, $strSortType=false) +{ + // if the parameters are invalid + if (!is_array($aryData) || !$strSortBy) + // return the array + return $aryData; + + // create our temporary arrays + $arySort = $aryResult = array(); + + // loop through the array + foreach ($aryData as $key => $aryRow) + // set up the value in the array + $arySort[$strIndex ? $aryRow[$strIndex] : $key] = $aryRow[$strSortBy]; + + // apply the natural sort + natsort($arySort); + + // if the sort type is descending + if ($strSortType=="desc") + // reverse the array + arsort($arySort); + + // loop through the sorted and original data + foreach ($arySort as $arySortKey => $arySorted) + if($strIndex) + { + foreach ($aryData as $aryOriginal) + // if the key matches + if ($aryOriginal[$strIndex]==$arySortKey) + // add it to the output array + array_push($aryResult, $aryOriginal); + } else + $aryResult[$arySortKey] = $aryData[$arySortKey]; + // return the return + return $aryResult; +} + +function update_admin_password($conn, $password) +{ + $sql = "UPDATE ".$conn['tbpref']."users SET password=".db_escape($password) . " + WHERE user_id='admin'"; + db_query($sql, "could not update user password for 'admin'"); +} function write_config_db($new = false) { global $path_to_root, $def_coy, $db_connections, $tb_pref_counter; - include_once($path_to_root . "/config_db.php"); if ($new) $tb_pref_counter++; $n = count($db_connections); $msg = " "; - for ($i = 0; $i < $n; $i++) - { - if ($i > 0) - $msg .= "\tarray "; - else - $msg .= "array "; - $msg .= "('name' => '" . $db_connections[$i]['name'] . "',\n"; - $msg .= "\t\t'host' => '" . $db_connections[$i]['host'] . "',\n"; - $msg .= "\t\t'dbuser' => '" . $db_connections[$i]['dbuser'] . "',\n"; - $msg .= "\t\t'dbpassword' => '" . $db_connections[$i]['dbpassword'] . "',\n"; - $msg .= "\t\t'dbname' => '" . $db_connections[$i]['dbname'] . "',\n"; - $msg .= "\t\t'tbpref' => '" . $db_connections[$i]['tbpref'] . "')"; - if ($i != $n - 1) - $msg .= ","; - $msg .= "\n\n"; - } - $msg .= "\t);\n?>"; + $msg .= "\$db_connections = " .var_export($db_connections, true); + $msg .= ";\n?>"; $filename = $path_to_root . "/config_db.php"; // Check if the file exists and is writable first. - if (file_exists($filename) && is_writable($filename)) + if ((!file_exists($filename) && is_writable($path_to_root)) || is_writable($filename)) { if (!$zp = fopen($filename, 'w')) { @@ -66,118 +114,243 @@ function write_config_db($new = false) return 0; } -function db_create_db($connection) +function write_extensions($extensions=null, $company = -1) { - $db = mysql_connect($connection["host"] , - $connection["dbuser"], $connection["dbpassword"]); - if (!mysql_select_db($connection["dbname"], $db)) + global $path_to_root, $installed_extensions, $next_extension_id; + + if (!isset($extensions)) { + $extensions = $installed_extensions; + } + if (!isset($next_extension_id)) { + $next_extension_id = 1; + } + + $msg = ""; + $filename = $path_to_root . ($company==-1 ? '' : '/company/'.$company) + .'/installed_extensions.php'; + + // Check if the file is writable first. + if (!$zp = @fopen($filename, 'w')) { - $sql = "CREATE DATABASE " . $connection["dbname"] . ""; - if (!mysql_query($sql)) - return 0; - mysql_select_db($connection["dbname"], $db); + display_error(sprintf(_("Cannot open the extension setup file '%s' for writing."), + $filename)); + return false; } - return $db; + else + { + if (!fwrite($zp, $msg)) + { + display_error(sprintf(_("Cannot write to the extensions setup file '%s'."), + $filename)); + fclose($zp); + return false; + } + // Close file + fclose($zp); + } + return true; } +//--------------------------------------------------------------------------------------------- +// +// Update per-company list of installed extensions +// +function update_extensions($extensions) { + global $db_connections; + + if (!write_extensions($extensions)) { + display_notification(_("Cannot update system extensions list.")); + return false; + } -function db_drop_db($connection) -{ - if ($connection["tbpref"] == "") + // update per company files + $cnt = max(1, count($db_connections)); + for($i = 0; $i < $cnt; $i++) { - $sql = "DROP DATABASE " . $connection["dbname"] . ""; - return mysql_query($sql); + $newexts = $extensions; + // update 'active' status + $exts = get_company_extensions($i); + foreach ($exts as $key => $ext) + { + if (isset($newexts[$key])) + $newexts[$key]['active'] = $exts[$key]['active']; + } + if(!write_extensions($newexts, $i)) + { + display_notification(sprintf(_("Cannot update extensions list for company '%s'."), + $db_connections[$i]['name'])); + return false; + } } - else + return true; +} + + +function write_lang() +{ + global $path_to_root, $installed_languages, $dflt_lang; + + $installed_languages = array_natsort($installed_languages, 'code', 'code'); + $n = count($installed_languages); + $msg = "\n"; + + $path = $path_to_root . "/lang"; + $filename = $path.'/installed_languages.inc'; + // Check if directory exists and is writable first. + if (file_exists($path) && is_writable($path)) { - $res = db_query("show table status"); - $all_tables = array(); - while($row = db_fetch($res)) - $all_tables[] = $row; - // get table structures - foreach ($all_tables as $table) + if (!$zp = fopen($filename, 'w')) { - if (strpos($table['Name'], $connection["tbpref"]) !== false) - db_query("DROP TABLE `".$table['Name'] . "`"); + display_error(_("Cannot open the languages file - ") . $filename); + return false; } - //deleting the tables, how?? - return true; + else + { + if (!fwrite($zp, $msg)) + { + display_error(_("Cannot write to the language file - ") . $filename); + fclose($zp); + return false; + } + // Close file + fclose($zp); + } + } + else + { + display_error(_("The language files folder ") . $path . _(" is not writable. Change its permissions so it is, then re-run the operation.")); + return false; } + return true; } -function db_import($filename, $connection) +function db_import($filename, $connection, $force=true) { + global $db, $go_debug, $sql_trail; + + $sql_trail = false; + + $allowed_commands = array( + "create" => 'table_queries', + "delimiter" => 'table_queries', + "alter table" => 'table_queries', + "insert" => 'data_queries', + "update" => 'data_queries', + "drop table if exists" => 'drop_queries', + "drop function if exists" => 'drop_queries', + "drop trigger if exists" => 'drop_queries', + ); + $ignored_mysql_errors = array( //errors ignored in normal (non forced) mode + '1022', // duplicate key + '1050', // Table %s already exists + '1060', // duplicate column name + '1061', // duplicate key name + '1062', // duplicate key entry + '1091' // can't drop key/column check if exists + ); $data_queries = array(); $drop_queries = array(); $table_queries = array(); + $sql_errors = array(); + ini_set("max_execution_time", "180"); + db_query("SET foreign_key_checks=0"); + $check_line_len = false; // uncrompress gziped backup files - if (strpos($filename, ".gzip") || strpos($filename, ".GZIP")) - $lines = db_ungzip("lines", $filename); - elseif (strpos($filename, ".zip") || strpos($filename, ".ZIP")) + if (strpos($filename, ".gz") || strpos($filename, ".GZ")) + { $lines = db_ungzip("lines", $filename); + $check_line_len = true; + } elseif (strpos($filename, ".zip") || strpos($filename, ".ZIP")) $lines = db_unzip("lines", $filename); else $lines = file("". $filename); - // divide insert and create sql queries - // $table is set to TRUE if the next line belongs to a create sql query - $table = false; - foreach($lines as $line) + // parse input file + $query_table = ''; + $delimiter = ';'; + foreach($lines as $line_no => $line) { - $line = trim($line); + $gzfile_bug = $check_line_len && (strlen($line) == 8190); // there is a bug in php (at least 4.1.1-5.5.9) gzfile which limits line length to 8190 bytes! + $line = trim($line); $line = str_replace("0_", $connection["tbpref"], $line); - // $line = str_replace("Y_", "0_", $line); - // the last line did not belong to a 'create' sql query - if (!$table) - { - - // this line does not, too - if (strtolower(substr($line,0,6)) == "insert") - { - $data_queries[] = substr($line, 0, strlen($line) - 1); - - // this line does not, too - } - elseif (strtolower(substr($line, 0, 20)) == "drop table if exists") - { - $drop_queries[] = substr($line, 0, strlen($line) - 1); - // this line does! - } - elseif (strtolower(substr($line, 0, 6)) == "create") + if ($query_table == '') + { // check if line begins with one of allowed queries + foreach($allowed_commands as $cmd => $table) { - $table = true; - $table_queries[] = $line . "\n"; - } - elseif (strtolower(substr($line, 0, 11)) == "alter table") + if (strtolower(substr($line, 0, strlen($cmd))) == $cmd) + { + if ($cmd == 'delimiter') { + $delimiter = trim(substr($line, 10)); + continue 2; + } + $query_table = $table; + ${$query_table}[] = array('', $line_no+1); + break; + } + } + } + if($query_table != '') // inside allowed query + { + $table = $query_table; + if (!$gzfile_bug && substr($line, -strlen($delimiter)) == $delimiter) // end of query found { - $data_queries[] = substr($line, 0, strlen($line) - 1); + $line = substr($line, 0, strlen($line) - strlen($delimiter)); // strip delimiter + $query_table = ''; } - - // the current line belongs to a create sql query - } - else - { - - // create sql query ending in this line - if (strtolower(substr($line, 0, 1)) == ")") - $table = false; - $table_queries[count($table_queries) - 1] .= $line . "\n"; + ${$table}[count(${$table}) - 1][0] .= $line . "\n"; } + } - - $sql_error = false; - +/* + { // for debugging purposes + global $path_to_root; + $f = fopen($path_to_root.'/tmp/dbimport.txt', 'w+'); + fwrite($f, print_r($drop_queries,true) ."\n"); + fwrite($f, print_r($table_queries,true) ."\n"); + fwrite($f, print_r($data_queries,true)); + fclose($f); + } +*/ // execute drop tables if exists queries if (is_array($drop_queries)) { foreach($drop_queries as $drop_query) { - $sql_error = false; - if (!db_query($drop_query)) + if (!db_query($drop_query[0])) { - $sql_error = true; - //if ($CONF['import_error']) echo nl2br($drop_query)."\n
".mysql_error()."

\n"; + if (!in_array(db_error_no(), $ignored_mysql_errors) || !$force) + $sql_errors[] = array(db_error_msg($db), $drop_query[1]); } } } @@ -187,11 +360,11 @@ function db_import($filename, $connection) { foreach($table_queries as $table_query) { - $sql_error = false; - if (!db_query($table_query)) - { - $sql_error = true; - //if ($CONF['import_error']) echo nl2br($table_query)."\n
".mysql_error()."

\n"; + if (!db_query($table_query[0])) + { + if (!in_array(db_error_no(), $ignored_mysql_errors) || !$force) { + $sql_errors[] = array(db_error_msg($db), $table_query[1]); + } } } } @@ -201,25 +374,25 @@ function db_import($filename, $connection) { foreach($data_queries as $data_query) { - $sql_error = false; - if (!db_query($data_query)) + if (!db_query($data_query[0])) { - //if ($CONF['import_error']) echo $data_query."\n
".mysql_error()."

\n"; - $sql_error = true; - return false; + if (!in_array(db_error_no(),$ignored_mysql_errors) || !$force) + $sql_errors[] = array(db_error_msg($db), $data_query[1]); } } } - // show number successful executed querys or if an error did occur - if ($sql_error == 1) + db_query("SET foreign_key_checks=1"); + if ($delimiter != ';') db_query("delimiter ;"); // just for any case + + if (count($sql_errors)) { + // display first failure message; the rest are probably derivative + $err = $sql_errors[0]; + display_error(sprintf(_("SQL script execution failed in line %d: %s"), + $err[1], $err[0])); return false; - //echo "
".IM_ERROR.".
\n"; - else + } else return true; - //echo "
".IM_SUCCESS." ".count($table_queries)." ".IM_TABLES." ".count($data_queries)." ".IM_ROWS." (".$import_file.")
\n"; - //$shell_command = C_MYSQL_PATH . " -h $host -u $user -p{$password} $dbname < $filename"; - //shell_exec($shell_command); } // returns the content of the gziped $path backup file. use of $mode see below @@ -240,30 +413,28 @@ function db_unzip($mode, $path) $all = implode("", file($path)); // convert path to name of ziped file - $filename = ereg_replace(".*/", "", $path); + $filename = preg_replace("/.*\//", "", $path); $filename = substr($filename, 0, strlen($filename) - 4); // compare filname in zip and filename from $_GET - if (substr($all, 30, strlen($filename)) != $filename) - { - return ''; - // exit if names differ - //echo F_WRONG_FILE."."; - //exit; + if (substr($all, 30, strlen($filename)-4) . substr($all, 30+strlen($filename)+9, 4) + != $filename) { + return ''; // exit if names differ } else { // get the suffix of the filename in hex - $crc_bugfix = substr(substr($filename, 0, strlen($filename) - 4), strlen($filename) - 12 - 4); + $crc_bugfix = substr($all, 30, strlen($filename)+13); + $crc_bugfix = substr(substr($crc_bugfix, 0, strlen($crc_bugfix) - 4), + strlen($crc_bugfix) - 12 - 4); $suffix = false; - // convert hex to ascii for ($i=0; $i < 12; ) $suffix .= chr($crc_bugfix[$i++] . $crc_bugfix[$i++] . $crc_bugfix[$i++]); // remove central directory information (we have always just one ziped file) - $comp = substr($all, -(strlen($all) - 30 - strlen($filename))); - $comp = substr($comp, 0, (strlen($comp) - 80 - strlen($filename))); + $comp = substr($all, -(strlen($all) - 30 - strlen($filename)-13)); + $comp = substr($comp, 0, (strlen($comp) - 80 - strlen($filename)-13)); // fix the crc bugfix (see function save_to_file) $comp = "xœ" . $comp . $suffix; @@ -277,15 +448,24 @@ function db_unzip($mode, $path) return explode("\n", $file_data); } +function db_backup($conn, $ext='no', $comm='', $tbpref = TB_PREF) +{ + if ($conn['tbpref'] != "") + $filename = $conn['dbname'] . "_" . $conn['tbpref'] . date("Ymd_Hi") . ".sql"; + else + $filename = $conn['dbname'] . "_" . date("Ymd_Hi") . ".sql"; + + return db_export($conn, clean_file_name($filename), $ext, $comm, $tbpref); +} + // generates a dump of $db database // $drop and $zip tell if to include the drop table statement or dry to pack -function db_export($conn, $filename, $zip='no', $comment='') +function db_export($conn, $filename, $zip='no', $comment='', $tbpref = TB_PREF, $no_default=false) { global $app_title, $version, $power_url, $path_to_root; $error = false; - // set max string size before writing to file $max_size = 1048576 * 2; // 2 MB // changes max size if value can be retrieved @@ -299,13 +479,14 @@ function db_export($conn, $filename, $zip='no', $comment='') $backupfile = $filename . ".zip"; else $backupfile = $filename; - $company = get_company_pref('coy_name'); + $company = get_company_pref('coy_name', $tbpref); + //create comment $out="# MySQL dump of database '".$conn["dbname"]."' on host '".$conn["host"]."'\n"; $out.="# Backup Date and Time: ".date("Y-m-d H:i")."\n"; $out.="# Built by " . $app_title . " " . $version ."\n"; $out.="# ".$power_url."\n"; - $out.="# Company: ".$company."\n"; + $out.="# Company: ". @html_entity_decode($company, ENT_QUOTES, $_SESSION['language']->encoding)."\n"; $out.="# User: ".$_SESSION["wa_current_user"]->name."\n\n"; // write users comment @@ -326,9 +507,8 @@ function db_export($conn, $filename, $zip='no', $comment='') $all_tables = array(); while($row = db_fetch($res)) { - //if ($conn["tbpref"] == "" || strpos($row['Name'], $conn["tbpref"]) !== false) replaced if (($conn["tbpref"] == "" && !preg_match('/[0-9]+_/', $row['Name'])) || - ($conn["tbpref"] != "" && strpos($row['Name'], $conn["tbpref"]) !== false)) + ($conn["tbpref"] != "" && strpos($row['Name'], $conn["tbpref"]) === 0)) $all_tables[] = $row; } // get table structures @@ -361,7 +541,6 @@ function db_export($conn, $filename, $zip='no', $comment='') // as long as no error occurred if (!$error) { - //while($row=@mysql_fetch_array($res)) foreach ($all_tables as $row) { $tablename = $row['Name']; @@ -372,46 +551,66 @@ function db_export($conn, $filename, $zip='no', $comment='') $out.="### Structure of table `".$tablename."` ###\n\n"; $out.="DROP TABLE IF EXISTS `".$tablename."`;\n\n"; + if ($no_default && ($def_pos = strpos($table_sql[$tablename], "DEFAULT CHARSET")) > 0) + $table_sql[$tablename] = substr($table_sql[$tablename], 0, $def_pos); $out.=$table_sql[$tablename]; // add auto_increment value - if ($auto_incr[$tablename]) - $out.=" AUTO_INCREMENT=".$auto_incr[$tablename]; +// if ($auto_incr[$tablename]) +// $out.=" AUTO_INCREMENT=".$auto_incr[$tablename]; $out.=" ;"; - $out.="\n\n\n"; + $out.="\n\n"; // export data if (!$error) { - $out.="### Data of table `".$tablename."` ###\n\n"; + $out.="### Data of table `".$tablename."` ###\n"; // check if field types are NULL or NOT NULL $res3 = db_query("SHOW COLUMNS FROM `" . $tablename . "`"); - $field_type = array(); + $field_null = array(); for ($j = 0; $j < db_num_rows($res3); $j++) { $row3 = db_fetch($res3); - $field_type[] = $row3[2]; + $field_null[] = $row3[2]=='YES' && $row3[4]===null; } $res2 = db_query("SELECT * FROM `" . $tablename . "`"); + $maxinsert = 0; + $insert = ''; for ($j = 0; $j < db_num_rows($res2); $j++) { - $out .= "INSERT INTO `" . $tablename . "` VALUES ("; $row2 = db_fetch_row($res2); - // run through each field + $values = '('; for ($k = 0; $k < $nf = db_num_fields($res2); $k++) { - // identify null values and save them as null instead of '' - if ($field_type[$k] != "" && $field_type[$k] != "NO" && $row2[$k] == "") - $out .= "NULL"; - else - $out .= "'" . db_escape($row2[$k]) . "'"; + $values .= db_escape($row2[$k], $field_null[$k]); if ($k < ($nf - 1)) - $out .= ", "; + $values .= ', '; + } + $values .= ')'; + $len = strlen($values); + if ($maxinsert < $len+1) + { + $maxinsert = EXPORT_MAX_INSERT; + if ($insert) + { + $out .= $insert .';'; // flush insert query + $insert = ''; + } } - $out .= ");\n"; + + if ($insert == '') + { + $insert = "\nINSERT INTO `" . $tablename . "` VALUES\n"; + $maxinsert -= strlen($insert); + } else { + $insert .= ",\n"; + } + + $maxinsert -= $len; + $insert .= $values; // if saving is successful, then empty $out, else set error flag if (strlen($out) > $max_size && $zip != "zip") @@ -422,12 +621,13 @@ function db_export($conn, $filename, $zip='no', $comment='') $error = true; } } - + if ($insert) + $out .= $insert. ';'; // an error occurred! Try to delete file and return error status } elseif ($error) { - @unlink($path_to_root . BACKUP_PATH . $backupfile); + @unlink(BACKUP_PATH . $backupfile); return false; } @@ -445,13 +645,10 @@ function db_export($conn, $filename, $zip='no', $comment='') } else { - @unlink($path_to_root . BACKUP_PATH . $backupfile); + @unlink(BACKUP_PATH . $backupfile); return false; } - // if (mysql_error()) return "DB_ERROR"; - //@mysql_close($con); - //if ($zip == "zip") // $zip = $time; if (save_to_file($backupfile, $zip, $out)) @@ -460,7 +657,7 @@ function db_export($conn, $filename, $zip='no', $comment='') } else { - @unlink($path_to_root . BACKUP_PATH . $backupfile); + @unlink(BACKUP_PATH . $backupfile); return false; } return $backupfile; @@ -523,7 +720,7 @@ function save_to_file($backupfile, $zip, $fileData) if ($zip == "gzip") { - if ($zp = @gzopen($path_to_root . BACKUP_PATH . $backupfile, "a9")) + if ($zp = @gzopen(BACKUP_PATH . $backupfile, "a9")) { @gzwrite($zp, $fileData); @gzclose($zp); @@ -549,20 +746,21 @@ function save_to_file($backupfile, $zip, $fileData) $crc = crc32($fileData); $zdata = gzcompress($fileData); - // string needed for decoding (because of crc bug) - //$name_suffix = substr($zdata, -4, 4); - //$name_suffix2 = "_"; - //for ($i = 0; $i < 4; $i++) - // $name_suffix2 .= sprintf("%03d", ord($name_suffix[$i])); - //$backupfile = substr($backupfile, 0, strlen($backupfile) - 8) . $name_suffix2 . ".sql.zip"; - $name = substr($backupfile, 0, strlen($backupfile) -4); + // extend stored file name with suffix + // needed for decoding (because of crc bug) + $name_suffix = substr($zdata, -4, 4); + $name_suffix2 = "_"; + for ($i = 0; $i < 4; $i++) + $name_suffix2 .= sprintf("%03d", ord($name_suffix[$i])); + + $name = substr($backupfile, 0, strlen($backupfile) - 8) . $name_suffix2 . ".sql"; // fix crc bug $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); $c_len = strlen($zdata); // dos time - $timearray = getdate($zip); + $timearray = getdate(); $dostime = (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1); $dtime = dechex($dostime); @@ -599,7 +797,7 @@ function save_to_file($backupfile, $zip, $fileData) // total # of entries "on this disk", total # of entries overall, size of central dir, offset to start of central dir, .zip file comment length $fileData .= pack('v', 1) . pack('v', 1) . pack('V', strlen($cdrec)) . pack('V', strlen($fr)) . "\x00\x00"; - if ($zp = @fopen($path_to_root . BACKUP_PATH . $backupfile, "a")) + if ($zp = @fopen(BACKUP_PATH . $backupfile, "a")) { @fwrite($zp, $fileData); @fclose($zp); @@ -614,7 +812,7 @@ function save_to_file($backupfile, $zip, $fileData) } else { - if ($zp = @fopen($path_to_root . BACKUP_PATH . $backupfile, "a")) + if ($zp = @fopen(BACKUP_PATH . $backupfile, "a")) { @fwrite($zp, $fileData); @fclose($zp); @@ -627,5 +825,56 @@ function save_to_file($backupfile, $zip, $fileData) } } +function create_comp_dirs($comp_path, $comp_subdirs) +{ + $index = ""; + $cdir = $comp_path; + @mkdir($cdir); + $f = @fopen("$cdir/index.php", "wb"); + @fwrite($f, $index); + @fclose($f); + + foreach($comp_subdirs as $dir) + { + @mkdir($cdir.'/'.$dir); + $f = @fopen("$cdir/$dir/index.php", "wb"); + @fwrite($f, $index); + @fclose($f); + } +} + +// +// Checks $field existence in $table with given field $properties +// $table - table name without prefix +// $field - optional field name +// $properties - optional properties of field defined by MySQL: +// 'Type', 'Null', 'Key', 'Default', 'Extra' +// +function check_table($pref, $table, $field=null, $properties=null) +{ + $tables = @db_query("SHOW TABLES LIKE '".$pref.$table."'"); + if (!db_num_rows($tables)) + return 1; // no such table or error + + $fields = @db_query("SHOW COLUMNS FROM ".$pref.$table); + if (!isset($field)) + return 0; // table exists + + while( $row = db_fetch_assoc($fields)) + { + if ($row['Field'] == $field) + { + if (!isset($properties)) + return 0; + foreach($properties as $property => $value) + { + if ($row[$property] != $value) + return 3; // failed type/length check + } + return 0; // property check ok. + } + } + return 2; // field not found +} ?> \ No newline at end of file