(PHP 4, PHP 5)
mysql_result — 取得结果数据
本扩展自 PHP 5.5.0 起已废弃，并在自 PHP 7.0.0 开始被移除。应使用 MySQLi 或 PDO_MySQL 扩展来替换之。参见 MySQL：选择 API 指南来获取更多信息。用以替代本函数的有：
Retrieves the contents of one cell from a MySQL result set.
When working on large result sets, you should consider using one of the functions that fetch an entire row (specified below). As these functions return the contents of multiple cells in one function call, they're MUCH quicker than mysql_result(). Also, note that specifying a numeric offset for the field argument is much quicker than specifying a fieldname or tablename.fieldname argument.
resultresource 型的结果集。此结果集来自对 mysql_query() 的调用。
row
The row number from the result that's being retrieved. Row numbers
start at 0.
fieldThe name or offset of the field being retrieved.
It can be the field's offset, the field's name, or the field's table dot field name (tablename.fieldname). If the column name has been aliased ('select foo as bar from...'), use the alias instead of the column name. If undefined, the first field is retrieved.
The contents of one cell from a MySQL result set on success, or
false on failure.
示例 #1 mysql_result() 示例
<?php
$link = mysql_connect('localhost', 'mysql_user', 'mysql_password');
if (!$link) {
die('Could not connect: ' . mysql_error());
}
if (!mysql_select_db('database_name')) {
die('Could not select database: ' . mysql_error());
}
$result = mysql_query('SELECT name FROM work.employee');
if (!$result) {
die('Could not query:' . mysql_error());
}
echo mysql_result($result, 2); // outputs third employee's name
mysql_close($link);
?>注意:
Calls to mysql_result() should not be mixed with calls to other functions that deal with the result set.
here's a rough replacement using mysqli:
if (!function_exists('mysql_result')) {
function mysql_result($result, $number, $field=0) {
mysqli_data_seek($result, $number);
$row = mysqli_fetch_array($result);
return $row[$field];
}
}This function accounts for the ability of the original function to accept "table_name.field_name" entries as well as just the field name:
function mysqli_result($res, $row, $field=0) {
$result->data_seek($row);
$data = $result->fetch_array();
$field_name = $field;
if ( is_string($field) ) {
$fields_array = explode(".", $field);
$array_len = count($fields_array);
if ($array_len > 1) {
$field_name = $fields_array[array_len - 1];
} else {
$field_name = $fields_array[0];
}
}
return $data[$field_name];
}To replace a row count e.g.
$querystring = "SELECT COUNT(*) FROM table WHERE column1 = 'EXAMPLE'";
$total_records = mysql_result(mysql_query($querystring,$connection),0);
use mysqli_fetch_row :
$querystring = "SELECT COUNT(*) FROM table WHERE column1 = 'EXAMPLE'";
$rowcount = mysqli_fetch_row(mysqli_query($connection,$querystring));
$total_records = $rowcount[0];I was also looking for mysqli replacement for getting first row, when query is known to return just 1 value. It seems this is simple:
echo(mysql_result($result, 0));
becomes
echo($result->fetch_row()[0]);
alternatively
if ($row = $result->fetch_row()) {
echo($row[0]);
}