文字

fbsql_fetch_field

(PHP 4 >= 4.0.6, PHP 5, PHP 7)

fbsql_fetch_fieldGet column information from a result and return as an object

说明

object fbsql_fetch_field ( resource $result [, int $field_offset ] )

Used in order to obtain information about fields in a certain query result.

参数

result

fbsql_query() fbsql_db_query() 返回的结果标识符。

field_offset

The numerical offset of the field. The field index starts at 0. If not specified, the next field that wasn't yet retrieved by fbsql_fetch_field() is retrieved.

返回值

Returns an object containing field information, or FALSE on errors.

The properties of the object are:

  • name - column name
  • table - name of the table the column belongs to
  • max_length - maximum length of the column
  • not_null - 1 if the column cannot be NULL
  • type - the type of the column

范例

Example #1 fbsql_fetch_field() example

<?php
fbsql_connect
( $host $user $password )
    or die(
"Could not connect" );
$result  fbsql_db_query ( "database" "select * from table" )
    or die(
"Query failed" );
# get column metadata
$i  0 ;
while (
$i  fbsql_num_fields ( $result )) {
    echo 
"Information for column  $i :<br />\n" ;
    
$meta  fbsql_fetch_field ( $result );
    if (!
$meta ) {
        echo 
"No information available<br />\n" ;
    }
    echo 
"<pre>
max_length:   
$meta -> max_length
name:         
$meta -> name
not_null:     
$meta -> not_null
table:        
$meta -> table
type:         
$meta -> type
</pre>"
;
    
$i ++;
}
fbsql_free_result ( $result );
?>

参见

  • fbsql_field_seek() - Set result pointer to a specified field offset
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