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我想在文本字段中显示行0和行1的值。这是我的code.but它显示“未定义偏移:1在C:\ wamp \ www \ member \ sys- admin \ groups.php第15行,未定义偏移量:2位于C:\ wamp \ www \ member \ sys-admin \ groups.php第16行,未定义偏移量:3位于C:\ wamp \ www \ member \ sys-第17行的管理员\ groups.php“。如何显示mysql表格行值
<?php
$r_sql = "SELECT ugroup FROM ugroups ";
$r_result = db::getInstance()->query($r_sql);
$row = $r_result->fetch(PDO::FETCH_NUM);
$g1 = $row['0'];
$g2 = $row[1];
$g3 = $row[2];
$g4 = $row[3];
?>
HTML
<input name="g1" type="text" id="g1" style="width:300px;" value="<?php echo $g1; ?>" />
<input name="g2" type="text" id="g2" style="width:300px;" value="<?php echo $g2; ?>" />