PHP 手册
上一页 |  | 下一页

# sesam_fetch_array

(PHP 3 CVS only)

sesam_fetch_array -- Fetch one row as an associative array

## 说明

array sesam_fetch_array ( string result_id [, int whence [, int offset]] )

sesam_fetch_array() is an alternative version of sesam_fetch_row(). Instead of storing the data in the numeric indices of the result array, it stores the data in associative indices, using the field names as keys.

sesam_fetch_array() fetches one row of data from the result associated with the specified result identifier. The row is returned as an associative array. Each result column is stored with an associative index equal to its column (aka. field) name. The column names are converted to lower case.

Columns without a field name (e.g., results of arithmetic operations) and empty fields are not stored in the array. Also, if two or more columns of the result have the same column names, the later column will take precedence. In this situation, either call sesam_fetch_row() or make an alias for the column.

    SELECT TBL1.COL AS FOO, TBL2.COL AS BAR FROM TBL1, TBL2

A special handling allows fetching "multiple field" columns (which would otherwise all have the same column names). For each column of a "multiple field", the index name is constructed by appending the string "(n)" where n is the sub-index of the multiple field column, ranging from 1 to its declared repetition factor. The indices are NOT zero based, in order to match the nomenclature used in the respective query syntax. For a column declared as:

    CREATE TABLE ... ( ... MULTI(3) INT )

the associative indices used for the individual "multiple field" columns would be `"multi(1)"`, `"multi(2)"`, and `"multi(3)"` respectively.

Subsequent calls to sesam_fetch_array() would return the next (or prior, or n'th next/prior, depending on the scroll attributes) row in the result set, or `FALSE` if there are no more rows.

## 参数

`result_id`

  A valid result id returned by sesam_query().

`whence`

  `whence` is an optional parameter for a fetch operation on "scrollable" cursors, which can be set to the following predefined constants:

  表 1. Valid values for `"whence"` parameter

  Value | Constant | Meaning
  --- | --- | ---
  0 | `SESAM_SEEK_NEXT` | read sequentially (after fetch, the internal default is set to `SESAM_SEEK_NEXT`)
  1 | `SESAM_SEEK_PRIOR` | read sequentially backwards (after fetch, the internal default is set to `SESAM_SEEK_PRIOR`)
  2 | `SESAM_SEEK_FIRST` | rewind to first row (after fetch, the default is set to `SESAM_SEEK_NEXT`)
  3 | `SESAM_SEEK_LAST` | seek to last row (after fetch, the default is set to `SESAM_SEEK_PRIOR`)
  4 | `SESAM_SEEK_ABSOLUTE` | seek to absolute row number given as `offset` (Zero-based. After fetch, the internal default is set to `SESAM_SEEK_ABSOLUTE`, and the internal offset value is auto-incremented)
  5 | `SESAM_SEEK_RELATIVE` | seek relative to current scroll position, where `offset` can be a positive or negative offset value.

  This parameter is only valid for "scrollable" cursors.

  When using "scrollable" cursors, the cursor can be freely positioned on the result set. If the `whence` parameter is omitted, the global default values for the scrolling type (initialized to: `SESAM_SEEK_NEXT`, and settable by sesam_seek_row()) are used. If `whence` is supplied, its value replaces the global default.

`offset`

  Only evaluated (and required) if `whence` is either `SESAM_SEEK_RELATIVE` or `SESAM_SEEK_ABSOLUTE`. This parameter is only valid for "scrollable" cursors.

## 返回值

Returns an array that corresponds to the fetched row, or `FALSE` if there are no more rows.

## 范例

例 1. SESAM fetch array

`<?php
$result = sesam_query("SELECT * FROM phone\n" .
" WHERE LASTNAME='" . strtoupper($name) . "'\n".
" ORDER BY FIRSTNAME", 1);
if (!$result) {
/* ... error ... */
}
// print the table:
echo "<table border=\"1\">\n";
while (($row = sesam_fetch_array($result)) && count($row) > 0) {
echo "<tr>\n";
echo "<td>" . htmlspecialchars($row["firstname"]) . "</td>\n";
echo "<td>" . htmlspecialchars($row["lastname"]) . "</td>\n";
echo "<td>" . htmlspecialchars($row["phoneno"]) . "</td>\n";
echo "</tr>\n";
}
echo "</table>\n";
sesam_free_result($result);
?>`

## 参见

sesam_fetch_row()

上一页 | 起始页 | 下一页
sesam_execimm | 上一级 | sesam_fetch_result