Multidimensional-proof解决方案:

array_walk_recursive($array, function(&$arrValue, $arrKey){ $arrValue = trim($arrValue);});

function trim_value(&$value) 
{ 
    $value = trim($value); 
}


// ut_sreco_dis Module
public function disExcelUpload($file=""){

    ini_set('MAX_EXECUTION_TIME', -1);
    ini_set('memory_limit', '-1');   

    $file_upload    = $file;

    if (isset($file_upload) && !empty($file_upload)){ 

    //You can add directly the Composer Autoloder in your controller: 
    require FCPATH . 'vendor/autoload.php';

    try{   
        $objPHPExcel = PHPExcel_IOFactory::load($file_upload);   
    }   
    catch (Exception $e){
        die('Error loading file "' . pathinfo($file_upload, PATHINFO_BASENAME) . '": '.@$e->getMessage()); 
    }   

    $allDataInSheet         = $objPHPExcel->getActiveSheet()->toArray(null, true, true, true);  
    $sheet                  = $objPHPExcel->getSheet(0);  
    $highestRow             = $sheet->getHighestRow();  
    $highestCol             = $sheet->getHighestColumn();  
    $highestco              = $sheet->getHighestDataColumn();  
    $arrayCount             = count($allDataInSheet);   
    $now                    = date("Y-m-d H:i:s");      
    $flag = 0;

    $check_template = array(
        'A' => 'FIN_ID',
        'B' => 'SECCODE',
        'C' => 'SCHEME_NO',
        'D' => 'SEC_SCH',
        'E' => 'DISNO',
        'F' => 'DISQTY',
        'G' => 'BILLQTY',
        'H' => 'BILLREF',
        'I' => 'BILLDT',       
    );

        $input_template = $allDataInSheet[1];

        array_walk($input_template, $this->trim_value);

        $result = array_diff($check_template, $input_template);

        if(empty($result))
        {
            $this->srObject->truncTableDis();

            # loop for inserting data 
            for ($i = 2,$j=0; $i <= $highestRow; $i++){

                $db_ch_ot = 64;

                $fin_id         = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
                $sec_code       = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
                $sch_no         = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
                $sec_sch        = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
                $dis_no         = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
                $dis_qty        = trim($allDataInSheet[$i][chr(++$db_ch_ot)]); 
                $bill_qty       = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);
                $bill_ref       = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);             
                $bill_dt        = trim($allDataInSheet[$i][chr(++$db_ch_ot)]);

                if(empty($bill_dt)){
                    $bill_dt = null;
                }else{
                    $dip_dt = date("Y-m-d",strtotime($bill_dt));                    
                }                

                $dt             = date('Y-m-d H:i:s');
                
                $insert_data = array(  
                    "fin_id_data"           => $fin_id,
                    "sec_code_data"         => $sec_code,
                    "sch_no_data"           => $sch_no,
                    "sec_sch_data"          => $sec_sch,
                    "dis_no_data"           => $dis_no,                   
                    "dis_qty_data"          => $dis_qty,                   
                    "bill_qty_data"         => $bill_qty,
                    "bill_ref_data"         => $bill_ref,                   
                    "bill_dt_data"          => $bill_dt,                    
                    "created_at_data"       => $dt,
                    "updated_at_data"       => $dt,           
                );
                
                if($this->srObject->insertSdisData($insert_data))
                {
                    ++$flag;
                }


            } //loop close  
        } else {
            $this->session->set_flashdata('error', 'Error. Invalid Excel Template');
            redirect(site_url('schill-bill-checking-suuti/sreco'));
        }  

        $this->session->set_flashdata('success', 'File Uploaded Successfully ..'.' New Record Inserted : '.$flag);
        redirect(site_url('schill-bill-checking-suuti/sreco'));

        
    }
    
}

Array_map ('trim'， $data)将所有子数组转换为null。如果只需要为字符串修剪空格，而保持其他类型不变，你可以使用:

$data = array_map(
    function ($item) {
        return is_string($item) ? trim($item) : $item;
    },
    $data
);

Array_map和trim可以完成这项工作

$trimmed_array = array_map('trim', $fruit);
print_r($trimmed_array);

$fruit= array_map('trim', $fruit);

如果值为NULL，则在array_map中修改类型。

更好的做法是:

$result = array_map(function($v){ 
  return is_string($v)?trim($v):$v; 
}, $array);