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474 lines
12 KiB
474 lines
12 KiB
4 months ago
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<?php
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/*
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* Session Management for PHP3
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*
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* Copyright (c) 1998-2000 NetUSE AG
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* Boris Erdmann, Kristian Koehntopp
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*
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* $Id: mysql.class.inc,v 1.12 2005/04/08 07:23:10 mschering Exp $
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*
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*/
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class db {
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/* public: connection parameters */
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var $Host = "";
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var $Database = "";
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var $User = "";
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var $Password = "";
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/* public: configuration parameters */
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var $Auto_Free = 0; ## Set to 1 for automatic mysql_free_result()
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var $Debug = 0; ## Set to 1 for debugging messages.
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var $Halt_On_Error = "yes"; ## "yes" (halt with message), "no" (ignore errors quietly), "report" (ignore errror, but spit a warning)
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var $PConnect = 0; ## Set to 1 to use persistent database connections
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var $Seq_Table = "db_sequence";
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/* public: result array and current row number */
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var $Record = array();
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var $Row;
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/* public: current error number and error text */
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var $Errno = 0;
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var $Error = "";
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/* public: this is an api revision, not a CVS revision. */
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var $type = "mysql";
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var $revision = "1.2";
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/* private: link and query handles */
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var $Link_ID = 0;
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var $Query_ID = 0;
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var $locked = false; ## set to true while we have a lock
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/* public: constructor */
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function db($query = "") {
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global $GO_CONFIG;
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if (isset($GO_CONFIG->db_host)) {
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$this->Host = $GO_CONFIG->db_host;
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}
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if (isset($GO_CONFIG->db_name)) {
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$this->Database = $GO_CONFIG->db_name;
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}
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if (isset($GO_CONFIG->db_user)) {
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$this->User = $GO_CONFIG->db_user;
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}
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if (isset($GO_CONFIG->db_pass)) {
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$this->Password = $GO_CONFIG->db_pass;
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}
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$this->query($query);
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}
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/* public: some trivial reporting */
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function link_id() {
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return $this->Link_ID;
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}
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function query_id() {
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return $this->Query_ID;
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}
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/* public: connection management */
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function connect($Database = "", $Host = "", $User = "", $Password = "") {
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/* Handle defaults */
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if ("" == $Database)
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$Database = $this->Database;
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if ("" == $Host)
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$Host = $this->Host;
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if ("" == $User)
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$User = $this->User;
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if ("" == $Password)
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$Password = $this->Password;
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/* establish connection, select database */
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if ( 0 == $this->Link_ID ) {
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if(!$this->PConnect) {
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$this->Link_ID = mysql_connect($Host, $User, $Password);
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} else {
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$this->Link_ID = mysql_pconnect($Host, $User, $Password);
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}
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if (!$this->Link_ID) {
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$this->halt("connect($Host, $User, \$Password) failed.");
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return 0;
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}
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if (!@mysql_select_db($Database,$this->Link_ID)) {
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$this->halt("cannot use database ".$Database);
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return 0;
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}
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}
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return $this->Link_ID;
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}
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/* public: discard the query result */
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function free() {
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@mysql_free_result($this->Query_ID);
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$this->Query_ID = 0;
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}
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/* public: perform a query */
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function query($Query_String) {
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/* No empty queries, please, since PHP4 chokes on them. */
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if ($Query_String == "")
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/* The empty query string is passed on from the constructor,
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* when calling the class without a query, e.g. in situations
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* like these: '$db = new DB_Sql_Subclass;'
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*/
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return 0;
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if (!$this->connect()) {
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return 0; /* we already complained in connect() about that. */
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};
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# New query, discard previous result.
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if ($this->Query_ID) {
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$this->free();
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}
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if ($this->Debug)
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printf("Debug: query = %s<br>\n", $Query_String);
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$this->Query_ID = @mysql_query($Query_String,$this->Link_ID);
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$this->Row = 0;
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$this->Errno = mysql_errno();
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$this->Error = mysql_error();
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if (!$this->Query_ID) {
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$this->halt("Invalid SQL: ".$Query_String);
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}
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# Will return nada if it fails. That's fine.
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return $this->Query_ID;
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}
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/* public: walk result set */
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function next_record($result_type=MYSQL_BOTH) {
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if (!$this->Query_ID) {
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$this->halt("next_record called with no query pending.");
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return 0;
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}
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$this->Record = @mysql_fetch_array($this->Query_ID, $result_type);
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$this->Row += 1;
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$this->Errno = mysql_errno();
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$this->Error = mysql_error();
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$stat = is_array($this->Record);
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if (!$stat && $this->Auto_Free) {
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$this->free();
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}
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return $stat;
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}
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/* public: position in result set */
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function seek($pos = 0) {
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$status = @mysql_data_seek($this->Query_ID, $pos);
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if ($status)
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$this->Row = $pos;
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else {
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$this->halt("seek($pos) failed: result has ".$this->num_rows()." rows.");
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/* half assed attempt to save the day,
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* but do not consider this documented or even
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* desireable behaviour.
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*/
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@mysql_data_seek($this->Query_ID, $this->num_rows());
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$this->Row = $this->num_rows();
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return 0;
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}
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return 1;
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}
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/* public: table locking */
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function lock($table, $mode = "write") {
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$query = "lock tables ";
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if(is_array($table)) {
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while(list($key,$value) = each($table)) {
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// text keys are "read", "read local", "write", "low priority write"
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if(is_int($key)) $key = $mode;
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if(strpos($value, ",")) {
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$query .= str_replace(",", " $key, ", $value) . " $key, ";
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} else {
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$query .= "$value $key, ";
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}
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}
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$query = substr($query, 0, -2);
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} elseif(strpos($table, ",")) {
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$query .= str_replace(",", " $mode, ", $table) . " $mode";
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} else {
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$query .= "$table $mode";
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}
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if(!$this->query($query)) {
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$this->halt("lock() failed.");
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return false;
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}
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$this->locked = true;
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return true;
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}
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function unlock() {
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// set before unlock to avoid potential loop
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$this->locked = false;
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if(!$this->query("unlock tables")) {
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$this->halt("unlock() failed.");
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return false;
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}
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return true;
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}
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/* public: evaluate the result (size, width) */
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function affected_rows() {
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return @mysql_affected_rows($this->Link_ID);
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}
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function num_rows() {
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return @mysql_num_rows($this->Query_ID);
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}
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function num_fields() {
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return @mysql_num_fields($this->Query_ID);
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}
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/* public: shorthand notation */
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function nf() {
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return $this->num_rows();
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}
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function np() {
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print $this->num_rows();
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}
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function f($Name) {
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if (isset($this->Record[$Name])) {
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return $this->Record[$Name];
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}
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}
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function p($Name) {
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if (isset($this->Record[$Name])) {
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print $this->Record[$Name];
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}
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}
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/* public: sequence numbers */
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function nextid($seq_name) {
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/* if no current lock, lock sequence table */
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if(!$this->locked) {
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if($this->lock($this->Seq_Table)) {
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$locked = true;
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} else {
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$this->halt("cannot lock ".$this->Seq_Table." - has it been created?");
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return 0;
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}
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}
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/* get sequence number and increment */
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$q = sprintf("select nextid from %s where seq_name = '%s'",
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$this->Seq_Table,
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$seq_name);
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if(!$this->query($q)) {
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$this->halt('query failed in nextid: '.$q);
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return 0;
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}
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/* No current value, make one */
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if(!$this->next_record()) {
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$currentid = 0;
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$q = sprintf("insert into %s values('%s', %s)",
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$this->Seq_Table,
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$seq_name,
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$currentid);
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if(!$this->query($q)) {
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$this->halt('query failed in nextid: '.$q);
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return 0;
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}
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} else {
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$currentid = $this->f("nextid");
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}
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$nextid = $currentid + 1;
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$q = sprintf("update %s set nextid = '%s' where seq_name = '%s'",
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$this->Seq_Table,
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$nextid,
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$seq_name);
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if(!$this->query($q)) {
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$this->halt('query failed in nextid: '.$q);
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return 0;
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}
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/* if nextid() locked the sequence table, unlock it */
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if($locked) {
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$this->unlock();
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}
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return $nextid;
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}
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/* public: return table metadata */
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function metadata($table = "", $full = false) {
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$count = 0;
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$id = 0;
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$res = array();
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/*
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* Due to compatibility problems with Table we changed the behavior
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* of metadata();
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* depending on $full, metadata returns the following values:
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*
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* - full is false (default):
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* $result[]:
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* [0]["table"] table name
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* [0]["name"] field name
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* [0]["type"] field type
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* [0]["len"] field length
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* [0]["flags"] field flags
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*
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* - full is true
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* $result[]:
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* ["num_fields"] number of metadata records
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* [0]["table"] table name
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* [0]["name"] field name
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* [0]["type"] field type
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* [0]["len"] field length
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* [0]["flags"] field flags
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* ["meta"][field name] index of field named "field name"
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* This last one could be used if you have a field name, but no index.
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* Test: if (isset($result['meta']['myfield'])) { ...
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*/
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// if no $table specified, assume that we are working with a query
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// result
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if ($table) {
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$this->connect();
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$id = @mysql_list_fields($this->Database, $table);
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if (!$id) {
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$this->halt("Metadata query failed.");
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return false;
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}
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} else {
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$id = $this->Query_ID;
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if (!$id) {
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$this->halt("No query specified.");
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return false;
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}
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}
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$count = @mysql_num_fields($id);
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// made this IF due to performance (one if is faster than $count if's)
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if (!$full) {
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for ($i=0; $i<$count; $i++) {
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$res[$i]["table"] = @mysql_field_table ($id, $i);
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$res[$i]["name"] = @mysql_field_name ($id, $i);
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$res[$i]["type"] = @mysql_field_type ($id, $i);
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$res[$i]["len"] = @mysql_field_len ($id, $i);
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$res[$i]["flags"] = @mysql_field_flags ($id, $i);
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}
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} else { // full
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$res["num_fields"]= $count;
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for ($i=0; $i<$count; $i++) {
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$res[$i]["table"] = @mysql_field_table ($id, $i);
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$res[$i]["name"] = @mysql_field_name ($id, $i);
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$res[$i]["type"] = @mysql_field_type ($id, $i);
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$res[$i]["len"] = @mysql_field_len ($id, $i);
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$res[$i]["flags"] = @mysql_field_flags ($id, $i);
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$res["meta"][$res[$i]["name"]] = $i;
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}
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}
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// free the result only if we were called on a table
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||
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if ($table) {
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@mysql_free_result($id);
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||
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}
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return $res;
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}
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|
||
|
|
/* public: find available table names */
|
||
|
|
function table_names() {
|
||
|
|
$this->connect();
|
||
|
|
$h = @mysql_query("show tables", $this->Link_ID);
|
||
|
|
$i = 0;
|
||
|
|
while ($info = @mysql_fetch_row($h)) {
|
||
|
|
$return[$i]["table_name"] = $info[0];
|
||
|
|
$return[$i]["tablespace_name"] = $this->Database;
|
||
|
|
$return[$i]["database"] = $this->Database;
|
||
|
|
$i++;
|
||
|
|
}
|
||
|
|
|
||
|
|
@mysql_free_result($h);
|
||
|
|
return $return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* private: error handling */
|
||
|
|
function halt($msg) {
|
||
|
|
$this->Error = @mysql_error($this->Link_ID);
|
||
|
|
$this->Errno = @mysql_errno($this->Link_ID);
|
||
|
|
|
||
|
|
if ($this->locked) {
|
||
|
|
$this->unlock();
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($this->Halt_On_Error == "no")
|
||
|
|
return;
|
||
|
|
|
||
|
|
$this->haltmsg($msg);
|
||
|
|
|
||
|
|
if ($this->Halt_On_Error != "report")
|
||
|
|
die("Session halted.");
|
||
|
|
}
|
||
|
|
|
||
|
|
function haltmsg($msg) {
|
||
|
|
go_log(LOG_DEBUG, sprintf("<b>MySQL Error</b>: %s (%s)<br>\n",
|
||
|
|
$this->Errno,
|
||
|
|
$this->Error));
|
||
|
|
printf("</td></tr></table><b>Database error:</b> %s<br>\n", $msg);
|
||
|
|
printf("<b>MySQL Error</b>: %s (%s)<br>\n",
|
||
|
|
$this->Errno,
|
||
|
|
$this->Error);
|
||
|
|
}
|
||
|
|
function update_row($table, $index, $fields)
|
||
|
|
{
|
||
|
|
if(isset($fields[$index]))
|
||
|
|
{
|
||
|
|
foreach($fields as $key => $value)
|
||
|
|
{
|
||
|
|
if($key != $index)
|
||
|
|
{
|
||
|
|
$updates[] = "`$key`='$value'";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if(isset($updates))
|
||
|
|
{
|
||
|
|
$sql = "UPDATE `$table` SET ".implode(',',$updates)." WHERE `$index`='".$fields[$index]."'";
|
||
|
|
return $this->query($sql);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
function insert_row($table, $fields)
|
||
|
|
{
|
||
|
|
foreach($fields as $key => $value)
|
||
|
|
{
|
||
|
|
$field_names[] = $key;
|
||
|
|
$field_values[] = $value;
|
||
|
|
}
|
||
|
|
if(isset($field_names))
|
||
|
|
{
|
||
|
|
$sql = "INSERT INTO `$table` (".implode(',', $field_names).") VALUES ".
|
||
|
|
"('".implode("','", $field_values)."')";
|
||
|
|
|
||
|
|
return $this->query($sql);
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
?>
|