PHP mssql database connection class instance, mssql database connection

PHP mssql database connection class instance, mssql database connection_PHP tutorial

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Release： 2016-07-13 10:12:50

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php mssql database connection class instance, mssql database connection

The example in this article describes the example code of PHP's mssql database connection class and is shared with everyone for your reference.

The specific implementation code is as follows:

Copy code The code is as follows:

class DB_Sql {
var $Host     = "";
var $Database = "";
var $User     = "";
var $Password = "";
var $Link_ID = 0;
var $Query_ID = 0;
var $Record   = array();
var $Row      = 0;

var $Errno    = 0;
var $Error    = "";
var $Auto_Free = 0;     ## set this to 1 to automatically free results

function DB_Sql($query = "") {
      $this->query($query);
}
function connect() {
    if ( 0 == $this->Link_ID ) {
      $this->Link_ID=mssql_connect($this->Host, $this->User, $this->Password);
      if (!$this->Link_ID)
        $this->halt("Link-ID == false, mssql_pconnect failed");
      else
          @mssql_select_db($this->Database, $this->Link_ID);
    }
}
function free_result(){
      mssql_free_result($this->Query_ID);
      $this->Query_ID = 0;
}

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;'
       */
      return 0;
      if (!$this->Link_ID)
        $this->connect();

#   printf("
Debug: query = %s
", $Query_String);

$this->Query_ID = mssql_query($Query_String, $this->Link_ID);
    $this->Row = 0;
    if (!$this->Query_ID) {
      $this->Errno = 1;
      $this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
      $this->halt("Invalid SQL: ".$Query_String);
    }
    return $this->Query_ID;
}

function next_record() {

    if ($this->Record = mssql_fetch_row($this->Query_ID)) {
      // add to Record[]
      $count = mssql_num_fields($this->Query_ID);
      for ($i=0; $i<$count; $i++){
          $fieldinfo = mssql_fetch_field($this->Query_ID,$i);
        $this->Record[strtolower($fieldinfo->name)] = $this->Record[$i];
      }
      $this->Row += 1;
      $stat = 1;
    } else {
      if ($this->Auto_Free) {
            $this->free_result();
          }
      $stat = 0;
    }
    return $stat;
}

function seek($pos) {
        mssql_data_seek($this->Query_ID,$pos);
      $this->Row = $pos;
}
function metadata($table) {
    $count = 0;
    $id    = 0;
    $res   = array();
    $this->connect();
    $id = mssql_query("select * from $table", $this->Link_ID);
    if (!$id) {
      $this->Errno = 1;
      $this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
      $this->halt("Metadata query failed.");
    }
    $count = mssql_num_fields($id);

    for ($i=0; $i<$count; $i++) {
        $info = mssql_fetch_field($id, $i);
      $res[$i]["table"] = $table;
      $res[$i]["name"] = $info["name"];
      $res[$i]["len"]   = $info["max_length"];
      $res[$i]["flags"] = $info["numeric"];
    }
    $this->free_result();
    return $res;
}

function affected_rows() {
// Not a supported function in PHP3/4. Chris Johnson, 16May2001.
//    return mssql_affected_rows($this->Query_ID);
    $rsRows = mssql_query("Select @@rowcount as rows", $this->Link_ID);
    if ($rsRows) {
       return mssql_result($rsRows, 0, "rows");
    }
}

function num_rows() {
    return mssql_num_rows($this->Query_ID);
}

function num_fields() {
    return mssql_num_fields($this->Query_ID);
}
function nf() {
    return $this->num_rows();
}

function np() {
    print $this->num_rows();
}

function f($Field_Name) {
    return $this->Record[strtolower($Field_Name)];
}

function p($Field_Name) {
    print $this->f($Field_Name);
}

function halt($msg) {
    printf("Database error: %s
", $msg);
    printf("MSSQL Error: %s (%s)
",
      $this->Errno,
      $this->Error);
    die("Session halted.");
}
}

希望本文所述对大家的PHP程序设计有所帮助。