(PHP 5 >= 5.1.0, PHP 7, PECL pdo >= 0.9.0)
PDOStatement::fetchColumn — 锟接斤拷锟斤拷锟斤拷械锟斤拷锟揭伙拷蟹锟斤拷氐锟斤拷锟斤拷锟揭伙拷小锟�
$column_number = 0
] ) : string
锟接斤拷锟斤拷锟斤拷械锟斤拷锟揭伙拷蟹锟斤拷氐锟斤拷锟斤拷锟揭伙拷校锟斤拷锟斤拷没锟斤拷锟剿ｏ拷锟津返伙拷 FALSE 锟斤拷
column_number锟斤拷锟斤拷锟斤拷锟斤拷锟饺★拷氐锟斤拷械锟斤拷锟斤拷锟斤拷锟斤拷郑锟斤拷锟�0锟斤拷始锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫伙拷锟斤拷峁┲碉拷锟斤拷锟� PDOStatement::fetchColumn() 锟斤拷取锟斤拷一锟叫★拷
PDOStatement::fetchColumn() 锟接斤拷锟斤拷锟斤拷械锟斤拷锟揭伙拷蟹锟斤拷氐锟斤拷锟斤拷锟揭伙拷小锟�
锟斤拷锟绞癸拷锟� PDOStatement::fetchColumn() 取锟斤拷锟斤拷锟捷ｏ拷锟斤拷没锟叫办法锟斤拷锟斤拷同一锟叫碉拷锟斤拷锟斤拷一锟叫★拷
Example #1 锟斤拷锟斤拷锟斤拷一锟叫的碉拷一锟斤拷
<?php
$sth = $dbh->prepare("SELECT name, colour FROM fruit");
$sth->execute();
/* 锟接斤拷锟斤拷锟斤拷械锟斤拷锟揭伙拷谢锟饺★拷锟揭伙拷锟� */
print("锟接斤拷锟斤拷锟斤拷械锟斤拷锟揭伙拷谢锟饺★拷锟揭伙拷校锟絓n");
$result = $sth->fetchColumn();
print("name = $result\n");
print("锟接斤拷锟斤拷锟斤拷械锟斤拷锟揭伙拷谢锟饺★拷诙锟斤拷校锟絓n");
$result = $sth->fetchColumn(1);
print("colour = $result\n");
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
锟接斤拷锟斤拷锟斤拷械锟斤拷锟揭伙拷谢锟饺★拷锟揭伙拷校锟� name = lemon 锟接斤拷锟斤拷锟斤拷械锟斤拷锟揭伙拷谢锟饺★拷诙锟斤拷校锟� colour = red