php - 将 mysql 代码转换为 codeigniter

Question

如何将此代码转换为可接受的 codeigniter 代码:

mysql_select_db($database_connection_ched, $connection_ched);
$query_Institutions = "SELECT * FROM tb_institutional_profile ORDER BY tb_institutional_profile.institution_name ASC";
$Institutions = mysql_query($query_Institutions, $connection_ched) or die(mysql_error());
$row_Institutions = mysql_fetch_assoc($Institutions);
$totalRows_Institutions = mysql_num_rows($Institutions);

<td width="192"><select name="institution_id">
<?php 
do { 
<option value="<?php echo $row_Institutions['institution_id']?>" ><?php echo $row_Institutions['institution_name']?></option>
<?php
} while ($row_Institutions = mysql_fetch_assoc($Institutions));
?>
</select></td>

Answer 1

首先，在application/config/ 文件夹中正确设置您的database.php，然后自动加载或使用$this->load->database( ); 在你的 Controller /模型上

<?php

$this->db->order_by("institution_name", "asc"); 
$result = $this->db->get('tb_institutional_profile');

$totalRows_Institutions = $this->db->count_all_results();

?>

<td width="192"><select name="institution_id">
    <?php 
        foreach($result->result() as $row ){
            ?>
            <option value="<?= $row->institution_id ?>">
            <?= $row->institution_name ?>
            </option>
            <?php
        } 
    ?>
</td>