(16) int mysql_field_seek(int result, int field_offset); 为随后的mysql_fetch_field()调用设置索引。发布没有明确列号的mysql_fetch_field()的下一次调用,将返回列col_num的信息。如果搜索成功,返回真,否则返回假。 col_num的范围为0到mysql_num_fields()-1. <?php $link=mysql_pconnect("localhost","sunsoft","suixiang") or die("Could not connect"); mysql_select_db("stamp_db") or die("Could not select database"); $query="SELECT * FROM president"; $result=mysql_query($query) or die("Query failed"); for($i=0;$i<mysql_num_fields($result);$i++) { printf("Information for column %d:<BR> ",$i); if(!mysql_field_seek($result,$i)) { print("Cannot seek to colum<BR> "); continue; } $meta=mysql_fetch_field($result,$i); if(!$meta) { print("No information available<BR> "); continue; } print("<PRE> "); printf("blob: %s ",$meta->blob); printf("max_length: %s ",$meta->max_length); printf("multiple_key: %s ",$meta->multiple_key); printf("name: %s ",$meta->name); printf("not_null: %s ",$meta->not_null); printf("numeric: %s ",$meta->numeric); printf("primary_key: %s ",$meta->primary_key); printf("table: %s ",$meta->table); printf("type: %s ",$meta->type); printf("unique_key: %s ",$meta->unique_key); printf("unsigned: %s ",$meta->unsigned); printf("zerofill: %s ",$meta->zerofill); print("</PRE> "); } ?>(17) string mysql_field_table(int result_id, int col_num); 返回结果集给定列的表名。对于计算列,此名为空。 col_num的范围为0到mysql_num_fields()-1.
<?php
$link=mysql_pconnect("localhost","sunsoft","suixiang") or die("Could not connect");
mysql_select_db("stamp_db");
$query="SELECT * FROM president";
$result=mysql_query($query) or die("Query failed");
for($i=0;$i<mysql_num_fields($result);$i++)
{
print("column $d:",$i);
printf("Name %s
",mysql_field_name($result,$i));
printf("Table %s
",mysql_field_nmae($result,$i));
print"<BR>
";
?>
(18) string mysql_field_type(int result_id, int col_num);
返回结果集给定列的类型名。类型名敬请等待参考本人的另外“MySQL列类型参考”。 col_num的范围为0到mysql_num_fields()-1.
<?php
$link=pconnect("localhost","sunsoft","suixiang") or die("Could not connect");
mysql_select_db("stamp_db");
$query="SELECT * FROM president";
$result=mysql_query($query) or die("Query failed");
for($i=0;$i<mysql_num_fields($result);$i++)
{
printf("colum %d:",$i);
printf("Name %s,
",mysql_field_name($result,$i));
printf("Type %s
",mysql_field_type($result,$i));
}
?> (19) string mysql_field_flags(int result_id, int col_num); 作为字符串返回结果集中给定列的相关元数据信息,如果出现错误,则返回假。这个字符串由以空格分开的词组成,说明哪个列的标记值为真。对于假的标记,在字符串中给出相应的词。
col_num的范围为0到mysql_num_fields()-1.
<?php
$link=mysql_pconnect("localhost","sunsoft","suixiang") or die("Could not connect");
mysql_select_db("stamp_db");
$query="SELECT * FORM member";
$result=mysql_query($query) or die("Query failed");
for($i=0;$i<mysql_num_fields($result);$i++)
{
printf("column %d:",$i);
printf("Name %s,
",mysql_fields_name($result,$i));
printf("Flags %s
",mysql_fields_flags($result,$i));
}
?>
(20) int mysql_field_len(int result, int field_offset);
返回结果集给定列中值可能的最大长度。 col_num的范围为0到mysql_num_fields()-1.
<?php
$link=mysql_pconnect("localhost","sunsoft","suixiang") or die("Could not connect");
mysql_select_db("stamp_db");
$query="SELECT * FROM member";
$result=mysql_query($query) or die("Query failed");
for($i=0;$i<mysql_num_fields($result);$i++)
{
printf("Column %d:",$i);
printf("Name %s,
",mysql_field_name($result,$i));
printf("Len %d
",mysql_field_len($result,$i));
print"<BR>
";
}
?> |