代碼: 選擇全部
<?php
/*
* Session Management for PHP3
*
* Copyright (c) 1998-2000 NetUSE AG
* Boris Erdmann, Kristian Koehntopp
*
* $Id: db_mysql.inc,v 1.8 2001/10/12 16:16:16 layne_weathers Exp $
*
*/
class DB_Sql {
/* public: connection parameters */
var $Host = "";
var $Database = "";
var $User = "";
var $Password = "";
var $Server = "mysql";
var $charset = "utf8";
/* public: configuration parameters */
var $Auto_Free = 0; ## Set to 1 for automatic mysqli_free_result()
var $Debug = 0; ## Set to 1 for debugging messages.
var $Halt_On_Error = "yes"; ## "yes" (halt with message), "no" (ignore errors quietly), "report" (ignore errror, but spit a warning)
var $Seq_Table = "db_sequence";
/* public: result array and current row number */
var $Record = array();
var $Row;
/* public: current error number and error text */
var $Errno = 0;
var $Error = "";
/* public: this is an api revision, not a CVS revision. */
var $type = "mysqli";
var $revision = "1.0";
/* private: link and query handles */
var $Link_ID = 0;
var $Query_ID = 0;
/* Quoting Helper - by Dave Beveridge */
function quote($str) {
return "'".$this->escape_string($str)."'";
}
function escape_string($str) {
if (!$this->connect()) return 0;
if (get_magic_quotes_gpc()) $str = stripslashes($str);
return mysqli_real_escape_string($this->Link_ID,$str);
}
function quote_identifier($str) {
$arr = explode(".",$str);
return "`".implode("`.`",$arr)."`";
}
function qi($str) {
$arr = explode(".",$str);
return "`".implode("`.`",$arr)."`";
}
function lastInsertId() {
return mysqli_insert_id($this->Link_ID);
}
/* public: constructor */
function DB_Sql($query = "") {
$this->query($query);
}
/* public: some trivial reporting */
function link_id() {
return $this->Link_ID;
}
function query_id() {
return $this->Query_ID;
}
/* public: connection management */
function connect($Database = "", $Host = "", $User = "", $Password = "") {
/* Handle defaults */
if ("" == $Database)
$Database = $this->Database;
if ("" == $Host)
$Host = $this->Host;
if ("" == $User)
$User = $this->User;
if ("" == $Password)
$Password = $this->Password;
/* establish connection, select database */
if ( ! $this->Link_ID ) {
if ($this->Debug) echo "Connecting to $Host as $User<br>\n";
$this->Link_ID=mysqli_connect($Host, $User, $Password);
if (!$this->Link_ID) {
$this->halt("connect($Host, $User, \$Password) failed.");
return 0;
}
if (!@mysqli_select_db($this->Link_ID, $Database)) {
$this->halt("cannot use database ".$Database);
return 0;
}
/* change character set to utf8 */
if (!mysqli_set_charset($this->Link_ID, $this->charset)) {
$this->halt("Error loading character set ".$this->charset);
}
}
return $this->Link_ID;
}
/* public: discard the query result */
function free() {
@mysqli_free_result($this->Query_ID);
$this->Query_ID = 0;
}
/* public: perform a query */
function query($Query_String) {
/* No empty queries, please, since PHP4 chokes on them. */
if ($Query_String == "") {
/* The empty query string is passed on from the constructor,
* when calling the class without a query, e.g. in situations
* like these: '$db = new DB_Sql_Subclass;'
*/
if ($this->Debug) echo "no query specified.";
return 0;
}
if (!$this->connect()) {
if ($this->Debug) echo "Complain Again!!";
return 0; /* we already complained in connect() about that. */
};
if ($this->Debug) echo "Connected";
# New query, discard previous result.
if ($this->Query_ID) {
$this->free();
}
if ($this->Debug)
printf("Debug: query = %s<br>\n", $Query_String);
$this->Query_ID = mysqli_query($this->Link_ID,$Query_String);
$this->Row = 0;
$this->Errno = mysqli_errno($this->Link_ID);
$this->Error = mysqli_error($this->Link_ID);
if (!$this->Query_ID) {
$this->halt("Invalid SQL: ".$Query_String);
}
# Will return nada if it fails. That's fine.
return $this->Query_ID;
}
/* public: walk result set */
function next_record() {
if (!$this->Query_ID) {
$this->halt("next_record called with no query pending.");
return 0;
}
if ($this->Debug) echo ".";
$this->Record = @mysqli_fetch_array($this->Query_ID);
$this->Row += 1;
$this->Errno = mysqli_errno($this->Link_ID);
$this->Error = mysqli_error($this->Link_ID);
$stat = is_array($this->Record);
if (!$stat && $this->Auto_Free) {
$this->free();
}
return $stat;
}
/* public: walk result set */
function next_row() {
if (!$this->Query_ID) {
$this->halt("next_record called with no query pending.");
return 0;
}
$this->Record = @mysqli_fetch_row($this->Query_ID);
$this->Row += 1;
$this->Errno = mysqli_errno();
$this->Error = mysqli_error();
$stat = is_array($this->Record);
if (!$stat && $this->Auto_Free) {
$this->free();
}
return $stat;
}
/* public: position in result set */
function seek($pos = 0) {
$status = @mysqli_data_seek($this->Query_ID, $pos);
if ($status)
$this->Row = $pos;
else {
$this->halt("seek($pos) failed: result has ".$this->num_rows()." rows.");
/* half assed attempt to save the day,
* but do not consider this documented or even
* desireable behaviour.
*/
@mysqli_data_seek($this->Query_ID, $this->num_rows());
$this->Row = $this->num_rows();
return 0;
}
return 1;
}
/* public: table locking */
function lock($table, $mode = "write") {
$query = "lock tables ";
if (is_array($table)) {
while (list($key,$value) = each($table)) {
if (!is_int($key)) {
// texts key are "read", "read local", "write", "low priority write"
$query .= "$value $key, ";
} else {
$query .= "$value $mode, ";
}
}
$query = substr($query,0,-2);
} else {
$query .= "`$table` $mode";
}
$res = $this->query($query);
if (!$res) {
$this->halt("lock() failed.");
return 0;
}
return $res;
}
function unlock() {
$res = $this->query("unlock tables");
if (!$res) {
$this->halt("unlock() failed.");
}
return $res;
}
/* public: evaluate the result (size, width) */
function affected_rows() {
return @mysqli_affected_rows($this->Link_ID);
}
function num_rows() {
return @mysqli_num_rows($this->Query_ID);
}
function num_fields() {
return @mysqli_num_fields($this->Query_ID);
}
/* public: shorthand notation */
function nf() {
return $this->num_rows();
}
function np() {
print $this->num_rows();
}
function f($Name) {
if (isset($this->Record[$Name])) {
return $this->Record[$Name];
}
}
function p($Name) {
if (isset($this->Record[$Name])) {
print $this->Record[$Name];
}
}
/* public: sequence numbers */
function nextid($seq_name) {
$this->connect();
if ($this->lock($this->Seq_Table)) {
/* get sequence number (locked) and increment */
$q = sprintf("select nextid from `%s` where seq_name = '%s'",
$this->Seq_Table,
$seq_name);
$id = @mysqli_query($this->Link_ID,$q);
$res = @mysqli_fetch_array($id);
/* No current value, make one */
if (!is_array($res)) {
$currentid = 0;
$q = sprintf("insert into `%s` values('%s', %s)",
$this->Seq_Table,
$seq_name,
$currentid);
$id = @mysqli_query($this->Link_ID, $q);
} else {
$currentid = $res["nextid"];
}
$nextid = $currentid + 1;
$q = sprintf("update `%s` set nextid = '%s' where seq_name = '%s'",
$this->Seq_Table,
$nextid,
$seq_name);
$id = @mysqli_query($this->Link_ID, $q);
$this->unlock();
} else {
$this->halt("cannot lock ".$this->Seq_Table." - has it been created?");
return 0;
}
return $nextid;
}
/* public: return table metadata */
function metadata($table = "", $full = false) {
$count = 0;
$id = 0;
$res = array();
/*
* Due to compatibility problems with Table we changed the behavior
* of metadata();
* depending on $full, metadata returns the following values:
*
* - full is false (default):
* $result[]:
* [0]["table"] table name
* [0]["name"] field name
* [0]["type"] field type
* [0]["len"] field length
* [0]["flags"] field flags
*
* - full is true
* $result[]:
* ["num_fields"] number of metadata records
* [0]["table"] table name
* [0]["name"] field name
* [0]["type"] field type
* [0]["len"] field length
* [0]["flags"] field flags
* ["meta"][field name] index of field named "field name"
* This last one could be used if you have a field name, but no index.
* Test: if (isset($result['meta']['myfield'])) { ...
*/
// if no $table specified, assume that we are working with a query
// result
if ($table) {
$this->connect();
//$id = @mysqli_list_fields($this->Database, $table);
$id = @mysqli_query($this->Link_ID,"SHOW FIELDS FROM $table");
if (!$id) {
$this->halt("Metadata query failed.");
return false;
}
} else {
#$id = $this->Query_ID;
#if (!$id) {
$this->halt("No table specified.");
return false;
#}
}
$count = @mysqli_num_rows($id);
for ($i=0; $i<$count; $i++) {
$row = @mysqli_fetch_array($id);
$res[$i]["table"] = $table;
$res[$i]["name"] = $row["Field"];
$res[$i]["type"] = $row["Type"];
#$res[$i]["len"] = @mysql_field_len ($id, $i);
#$res[$i]["flags"] = @mysql_field_flags ($id, $i);
}
if ($full) {
$res["num_fields"] = $count;
for ($i=0; $i<$count; $i++) {
$res["meta"][$res[$i]["name"]] = $i;
}
}
// free the result only if we were called on a table
if ($table) {
@mysqli_free_result($id);
}
for ($i=0; $i<$count; $i++) {
$res[$i]["group"] = $res[$i]["type"];
$h = @mysqli_query($this->Link_ID,"SHOW FIELDS FROM $table WHERE Field='".$res[$i]["name"]."'");
$row = @mysqli_fetch_array($h);
$fattr = "";
$pos = strpos ( $row["Type"], "(" );
if ( $pos > 0 ) {
$ftype = substr ( $row["Type"], 0, $pos );
$fsize = substr ( $row["Type"], $pos +1 );
$pos = strpos ( $fsize, ") " );
if ( $pos > 0 ) {
$fattr = substr ( $fsize, $pos +2, strlen ($fsize) -2 -$pos );
$fsize = substr ( $fsize, 0, $pos );
} else {
$fsize = substr ( $fsize, 0, $pos -1 );
}
} else {
$fsize = "";
$ftype = $row["Type"];
}
$res[$i]["key"] = $row["Key"];
$res[$i]["chars"] = $fsize;
$res[$i]["type"] = $ftype;
$res[$i]["attr"] = $fattr; /* eg unsigned */
$res[$i]["null"] = $row["Null"];
$res[$i]["extra"] = $row["Extra"];
$res[$i]["default"] = $row["Default"];
}
return $res;
}
/* public: find available table names */
function table_names() {
$this->connect();
$h = @mysqli_query($this->Link_ID,"show tables");
$i = 0;
while ($info = @mysqli_fetch_row($h)) {
$return[$i]["table_name"] = $info[0];
$return[$i]["tablespace_name"] = $this->Database;
$return[$i]["database"] = $this->Database;
$i++;
}
@mysqli_free_result($h);
return $return;
}
function primary_key($table) {
$this->connect();
$h = @mysqli_query($this->Link_ID,"show index from `$table` where Key_name='PRIMARY'");
if ($info = @mysqli_fetch_array($h)) {
$return = $info["Column_name"];
}
@mysql_free_result($h);
return $return;
}
/* private: error handling */
function halt($msg) {
$this->Error = @mysqli_error($this->Link_ID);
$this->Errno = @mysqli_errno($this->Link_ID);
if ($this->Debug) echo "MySQL Error:".$this->Errno." ".$this->Error.$msg;
if (function_exists("EventLog")) {
EventLog("MySQL Error:".$this->Errno." ".$this->Error,$msg,"Error");
}
if ($this->Halt_On_Error == "no")
return;
$this->haltmsg($msg);
if ($this->Halt_On_Error != "report")
die("Session halted.");
}
function haltmsg($msg) {
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);
}
}
?>