Php/docs/mysqli-result.fetch-array
mysqli_result::fetch_array
mysqli_fetch_array
(PHP 5, PHP 7)
mysqli_result::fetch_array -- mysqli_fetch_array — Fetch a result row as an associative, a numeric array, or both
说明
面向对象风格
public mysqli_result::fetch_array
([ int $resulttype
= MYSQLI_BOTH
] ) : mixed
过程化风格
mysqli_fetch_array
( mysqli_result $result
[, int $resulttype
= MYSQLI_BOTH
] ) : mixed
Returns an array that corresponds to the fetched row or null
if there
are no more rows for the resultset represented by the
result
parameter.
mysqli_fetch_array() is an extended version of the mysqli_fetch_row() function. In addition to storing the data in the numeric indices of the result array, the mysqli_fetch_array() function can also store the data in associative indices, using the field names of the result set as keys.
Note: 此函数返回的字段名大小写敏感。
Note: 此函数将 NULL 字段设置为 PHP
null
值。
If two or more columns of the result have the same field names, the last column will take precedence and overwrite the earlier data. In order to access multiple columns with the same name, the numerically indexed version of the row must be used.
参数
result
仅以过程化样式:由 mysqli_query(),mysqli_store_result() 或 mysqli_use_result()返回的结果集标识。
resulttype
This optional parameter is a constant indicating what type of array should be produced from the current row data. The possible values for this parameter are the constants
MYSQLI_ASSOC
,MYSQLI_NUM
, orMYSQLI_BOTH
.By using the
MYSQLI_ASSOC
constant this function will behave identically to the mysqli_fetch_assoc(), whileMYSQLI_NUM
will behave identically to the mysqli_fetch_row() function. The final optionMYSQLI_BOTH
will create a single array with the attributes of both.
返回值
Returns an array of strings that corresponds to the fetched row or null
if there
are no more rows in resultset.
范例
Example #1 面向对象风格
<?php$mysqli = new mysqli("localhost", "my_user", "my_password", "world");/* check connection */if ($mysqli->connect_errno) { printf("Connect failed: %s\n", $mysqli->connect_error); exit();}$query = "SELECT Name, CountryCode FROM City ORDER by ID LIMIT 3";$result = $mysqli->query($query);/* numeric array */$row = $result->fetch_array(MYSQLI_NUM);printf ("%s (%s)\n", $row[0], $row[1]);/* associative array */$row = $result->fetch_array(MYSQLI_ASSOC);printf ("%s (%s)\n", $row["Name"], $row["CountryCode"]);/* associative and numeric array */$row = $result->fetch_array(MYSQLI_BOTH);printf ("%s (%s)\n", $row[0], $row["CountryCode"]);/* free result set */$result->free();/* close connection */$mysqli->close();?>
Example #2 过程化风格
<?php$link = mysqli_connect("localhost", "my_user", "my_password", "world");/* check connection */if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit();}$query = "SELECT Name, CountryCode FROM City ORDER by ID LIMIT 3";$result = mysqli_query($link, $query);/* numeric array */$row = mysqli_fetch_array($result, MYSQLI_NUM);printf ("%s (%s)\n", $row[0], $row[1]);/* associative array */$row = mysqli_fetch_array($result, MYSQLI_ASSOC);printf ("%s (%s)\n", $row["Name"], $row["CountryCode"]);/* associative and numeric array */$row = mysqli_fetch_array($result, MYSQLI_BOTH);printf ("%s (%s)\n", $row[0], $row["CountryCode"]);/* free result set */mysqli_free_result($result);/* close connection */mysqli_close($link);?>
以上例程会输出:
Kabul (AFG) Qandahar (AFG) Herat (AFG)
参见
- mysqli_fetch_assoc() - Fetch a result row as an associative array
- mysqli_fetch_row() - Get a result row as an enumerated array
- mysqli_fetch_object() - Returns the current row of a result set as an object
- mysqli_query() - 对数据库执行一次查询
- mysqli_data_seek() - Adjusts the result pointer to an arbitrary row in the result