PHP 5.4.33 Released

mssql_field_seek

(PHP 4, PHP 5, PECL odbtp >= 1.1.1)

mssql_field_seekSeeks to the specified field offset

说明

bool mssql_field_seek ( resource $result , int $field_offset )

Seeks to the specified field offset. If the next call to mssql_fetch_field() won't include a field offset, this field would be returned.

参数

result

The result resource that is being evaluated. This result comes from a call to mssql_query().

field_offset

The field offset, starts at 0.

返回值

成功时返回 TRUE, 或者在失败时返回 FALSE

范例

Example #1 Using mssql_field_seek() on the example for mssql_fetch_field()

<?php
// Connect to MSSQL and select the database
mssql_connect('MANGO\SQLEXPRESS''sa''phpfi');
mssql_select_db('php');

// Send a select query to MSSQL
$query mssql_query('SELECT * FROM [php].[dbo].[persons]');

// Construct table
echo '<h3>Table structure for \'persons\'</h3>';
echo 
'<table border="1">';

// Table header
echo '<thead>';
echo 
'<tr>';
echo 
'<td>Field name</td>';
echo 
'<td>Data type</td>';
echo 
'<td>Max length</td>';
echo 
'</tr>';
echo 
'</thead>';

// Dump all fields
echo '<tbody>';

for (
$i 0$i mssql_num_fields($query); ++$i) {
    
// Fetch the field information, notice the 
    // field_offset parameter is not set. See 
    // the mssql_field_seek call below
    
$field mssql_fetch_field($query);

    
// Print the row
    
echo '<tr>';
    echo 
'<td>' $field->name '</td>';
    echo 
'<td>' strtoupper($field->type) . '</td>';
    echo 
'<td>' $field->max_length '</td>';
    echo 
'</tr>';

    
// Move the internal seek pointer to the next
    // row in the result set
    
mssql_field_seek($query$i 1);
}

echo 
'</tbody>';
echo 
'</table>';

// Free the query result
mssql_free_result($query);
?>

参见

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User Contributed Notes 1 note

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kevin_tom at hotmail dot com
10 years ago
Don't know this would help.
If you are using mssql to loop through a web page. Here is how to do it:
Suppose you want to select a few fields from t1 joining to t2

$numPerPage=10;
if(empty($offset))
  $offset=0;
if($next_x){
  $offset+=$numPerPage;
}
if($previous_x){
  $offset-=$numPerPage;
}

$qry_string = "SELECT DISTINCT TOP $numPerPage t1.field1, t1.field2 from t1 LEFT
JOIN t2 ON t2.field1=t1.field1
WHERE t2.another_field='specific_val'
AND t1.fields
NOT IN
(SELECT DISTINCT TOP $offset tmpT1.field1
FROM t1 AS tmpT1 LEFT
JOIN t2 ON t2.field1=tmpT1.field1
WHERE t2.another_field='specific_val'
)";

// then run the above $qry_string using the while loop
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