# ingres_connect

(PHP 4 >= 4.0.2, PHP 5 < 5.1.0, PECL ingres >= 1.0.0)

ingres_connect — Open a connection to an Ingres database

### 说明

ingres_connect ([ string `$database` [, string `$username` [, string `$password` [, array `$options` ]]]] ) : resource

ingres_connect() opens a connection with the given Ingres `database`.

The connection is closed when the script ends or when ingres_close() is called on this link.

### 参数

If some parameters are missing, ingres_connect() uses the values in php.ini for `ingres.default_database`, `ingres.default_user` and `ingres.default_password`.

`database`

  The database name. Must follow the syntax:

  [vnode::]dbname[/svr_class]

`username`

  The Ingres user name

`password`

  The password associated with `username`

`options`

  ingres_connect() options

  Option name | Option type | Description | Example
  --- | --- | --- | ---
  date_century_boundary | integer | The threshold by which a 2-digit year is determined to be in the current century or in the next century. Equivalent to II_DATE_CENTURY_BOUNDARY. | 50
  group | string | Specifies the group ID of the user, equivalent to the "-G" flag | payroll
  role | string | The role ID of the application. If a role password is required, the parameter value should be specified as "role/password"
  effective_user | string | The ingres user account being impersonated, equivalent to the "-u" flag | another_user
  dbms_password | string | The internal database password for the user connecting to Ingres | s3cr3t
  table_structure | string | The default structure for new tables. Valid values for table_structure are: INGRES_STRUCTURE_BTREE INGRES_STRUCTURE_HASH INGRES_STRUCTURE_HEAP INGRES_STRUCTURE_ISAM INGRES_STRUCTURE_CBTREE INGRES_STRUCTURE_CISAM INGRES_STRUCTURE_CHASH INGRES_STRUCTURE_CHEAP | INGRES_STRUCTURE_BTREE
  index_structure | string | The default structure for new secondary indexes. Valid values for index_structure are: INGRES_STRUCTURE_CBTREE INGRES_STRUCTURE_CISAM INGRES_STRUCTURE_CHASH INGRES_STRUCTURE_BTREE INGRES_STRUCTURE_HASH INGRES_STRUCTURE_ISAM | INGRES_STRUCTURE_HASH
  login_local | boolean | Determines how the connection user ID and password are used when a VNODE is included in the target database string. If set to TRUE, the user ID and password are used to locally access the VNODE, and the VNODE login information is used to establish the DBMS connection. If set to FALSE, the process user ID is used to access the VNODE, and the connection user ID and password are used in place of the VNODE login information to establish the DBMS connection. This parameter is ignored if no VNODE is included in the target database string. The default is FALSE. | TRUE
  timezone | string | Controls the timezone of the session. If not set it will default to the value defined by II_TIMEZONE_NAME. If II_TIMEZONE_NAME is not defined, NA-PACIFIC (GMT-8 with Daylight Savings) is used.
  date_format | integer | Sets the allowable input and output format for Ingres dates. Defaults to the value defined by II_DATE_FORMAT. If II_DATE_FORMAT is not set the default date format is US, e.g. mm/dd/yy. Valid values for date_format are: INGRES_DATE_DMY INGRES_DATE_FINISH INGRES_DATE_GERMAN INGRES_DATE_ISO INGRES_DATE_ISO4 INGRES_DATE_MDY INGRES_DATE_MULTINATIONAL INGRES_DATE_MULTINATIONAL4 INGRES_DATE_YMD INGRES_DATE_US | INGRES_DATE_MULTINATIONAL4
  decimal_separator | string | The character identifier for decimal data | ","
  money_lort | integer | Leading or trailing currency sign. Valid values for money_lort are: INGRES_MONEY_LEADING INGRES_MONEY_TRAILING | INGRES_MONEY_TRAILING
  money_sign | string | The currency symbol to be used with the MONEY datatype | €
  money_precision | integer | The precision of the MONEY datatype | 3
  float4_precision | integer | Precision of the FLOAT4 datatype | 10
  float8_precision | integer | Precision of the FLOAT8 data | 10
  blob_segment_length | integer | The amount of data in bytes to fetch at a time when retrieving BLOB or CLOB data, defaults to 4096 bytes when not explicitly set | 8192

### 返回值

Returns a Ingres link resource on success 或者在失败时返回 `FALSE`

### 范例

Example #1 Open a connection to an Ingres database

    <?php
    $link = ingres_connect("mydb", "user", "pass")
        or die("Could not connect");
    echo "Connected successfully";
    ingres_close($link);
    ?>

### 参见

- ingres_pconnect() - Open a persistent connection to an Ingres database
- ingres_close() - Close an Ingres database connection