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Ce document utilise Manuel du site Web PHP chinois Libérer
(PHP 4 >= 4.0.6, PHP 5, PHP 7)
fbsql_fetch_field — Get column information from a result and return as an object
$result
[, int $field_offset
] )Used in order to obtain information about fields in a certain query result.
result
由 fbsql_query() 或 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.
Returns an object containing field information, or FALSE
on errors.
The properties of the object are:
NULL
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 );
?>