如何解决Codeigniter-计算表上的所有内容无效
请您帮我这个忙。我正在尝试计算表中有多少，因为它没有在视图中显示结果。
控制器
<tbody style="page-break-inside: avoid">
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top" class="style3">R5</td>
<td style="" id="column3" valign="top" class="style2">A</td>
<td style="" id="column4" valign="top" colspan="2" class="style2">
<a target="_blank" href="CoverSheet.aspx?ItemID=19186&MeetingID=779">
<p>AN ORDINANCE OF THE MAYOR AND CITY COMMISSION OF THE CITY OF MIAMI BEACH,FLORIDA,AMENDING CHAPTER 30 OF THE MIAMI BEACH CITY CODE,ENTITLED "CODE ENFORCEMENT," BY AMENDING ARTICLE Il,ENTITLED "SPECIAL MASTER," BY AMENDING SECTION 30-37,ENTITLED "TERMS OF OFFICE; COMPENSATION"; BY AMENDING THE COMPENSATION OF THE SPECIAL MASTER(S); PROVIDING FOR CODIFICATION,REPEALER,SEVERABILITY,AND AN EFFECTIVE DATE.</p>
</a>
</td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top"></td>
<td style="" id="column5" valign="top"></td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top" class="style6">First Reading</td>
<td style="" id="column5" valign="top" class="style3">Office of the City Clerk</td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top" class="style7"></td>
<td style="" id="column5" valign="top" class="style3">Commissioner Michael Gongora</td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
</tbody>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top"></td>
<td style="" id="column5" valign="top"></td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top"></td>
<td style="" id="column5" valign="top" colspan="1" class="style8"></td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
<tbody style="page-break-inside: avoid">
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top" class="style3">R5</td>
<td style="" id="column3" valign="top" class="style2">B</td>
<td style="" id="column4" valign="top" colspan="2" class="style2">
<a target="_blank" href="CoverSheet.aspx?ItemID=19206&MeetingID=779">
<p>SHORT TERM RENTAL FINE REVISIONS</p>
<p>AN ORDINANCE OF THE MAYOR AND CITY
COMMISSION OF THE CITY OF MIAMI BEACH,AMENDING MIAMI BEACH CITY CODE CHAPTER 142,"ZONING disTRICTS AND REGULATIONS," ARTICLE IV,"SUPPLEMENTARY disTRICT REGULATIONS,"
SECTION 142-905,"PERMITTED ACCESSORY USES IN
SINGLE-FAMILY disTRICTS," AT SUBSECTION (b)(5)
THEREOF,AND AMENDING SECTION 142-1111,"SHORTTERM
RENTAL OF APARTMENT UNITS OR
TOWNHOMES," FOR THE LIMITED PURPOSE OF
DELETING THE FINE AMOUNTS SPECIFIED THEREIN
FOR VIOLATIONS OF THE CITY'S SHORT-TERM RENTAL
RESTRICTIONS (INCLUDING CORRESPONDING
RESTRICTION ON SPECIAL MASTER'S INABILITY TO
WAIVE OR REDUCE SAID FInes),AND SUBSTITUTING
THEREFOR THOSE FINE AMOUNTS WITHIN THE
STATUTORILY-PRESCRIbed LIMITS SET FORTH IN
CHAPTER 162,FLORIDA STATUTES; AND PROVIDING
FOR REPEALER,CODIFICATION,AND
AN EFFECTIVE DATE.
</p>
</a>
</td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top"></td>
<td style="" id="column5" valign="top"></td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top" class="style6">First Reading</td>
<td style="" id="column5" valign="top" class="style3">Planning/Office of the City Attorney</td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top" class="style7"></td>
<td style="" id="column5" valign="top" class="style3">Mayor Dan Gelber</td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
</tbody>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top"></td>
<td style="" id="column5" valign="top"></td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
<tr>
<td style="" id="column1" valign="top"></td>
<td style="" id="column2" valign="top"></td>
<td style="" id="column3" valign="top"></td>
<td style="" id="column4" valign="top"></td>
<td style="" id="column5" valign="top" colspan="1" class="style8">Supplemental updated on 9/25/2020 (Memorandum & Ordinance)</td>
<td style="" id="column6" valign="top"></td>
<td style="" id="column7" valign="top"></td>
<td style="" id="column8" valign="top"></td>
</tr>
</TABLE>
模型
public function enrollment_summary()
{
$data['title'] = 'Enrollment Summary';
$this->load->model('report_model');
$data['query'] = $this->report_model->get_students();
$this->load->view('report_enrollment_summary',$data);
}
查看
<?PHP
class report_model extends CI_Model
{
public function __construct()
{
parent::__construct();
$this->load->database();
}
public function get_students()
{
$query = $this->db->count_all('students');
}
}
解决方法
您的get_students（）不返回任何内容吗？
因此，您需要添加退货。
您当前的方法...
public function get_students()
{
$query = $this->db->count_all('students');
}
成为
public function get_students()
{
$query = $this->db->count_all('students');
return $query;
}
OR
public function get_students()
{
return $this->db->count_all('students');
}
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