我研究了 CodeIgniter 4 中有關 Helpers 的常見問題，但到目前為止沒有一個答案有幫助：
CodeIgniter 論壇 Thread-77770
StackOverflow 問題-62404109
我撰寫了一個名為 的助手arithmetic_helper.php，通過 將其加載到 BaseController 中protected $helpers = ['url', 'html', 'session', 'Arithmetic'];，并嘗試使用helper('Arithmetic'). 我不斷收到錯誤
呼叫未定義的函式 App\Controllers...
這是我的幫手Arithmetic_Helper.php：
namespace App\Helpers;
class Arithmetic_Helper
{
/**
* Round percentage to nearest whole number
* @param float value of percentage
* @param integer value of precision desired
* @return string percentage %
*/
public function round_percentage($percentage, $precision)
{
return round($percentage, $precision) . '%';
}
/**
* Calculate percentage by adding values together to find
* total, then dividing by key value. Then calls round
* percentage
* @param array of values from table to include in
* calculation
* @param integer of key value in percentage
* @return float of calculated percentage to desired precision
*/
public function get_percentage($total, $key_value, $precision)
{
// Can't divide by zero
if ($total == 0) {
return round_percentage(0,0);
}
else {
$percentage = ($key_value / $total) * 100;
$roundPercent = round_percentage($percentage, $precision);
return $roundPercent;
}
}
/**
* Determine which time interval is most reasonable
* @param datetime1 object of date in question
* @param datetime2 object of date in queston
* @return string of date elapsed in words
*/
public function get_date_words($datetime1, $datetime2)
{
$dateIntervals = get_intervals_date($datetime1, $datetime2);
$dateWords = '';
if ($dateIntervals['years'] > 0) {
$dateWords = $dateIntervals['years'] . ' Years';
if ($dateIntervals['years'] == 1) {
$dateWords = $dateIntervals['years'] . ' Year';
}
}
elseif ($dateIntervals['months'] > 0){
$dateWords = $dateIntervals['months'] . ' Months';
if ($dateIntervals['months'] == 1) {
$dateWords = $dateIntervals['months'] . ' Month';
}
}
elseif ($dateIntervals['weeks'] > 0){
$dateWords = $dateIntervals['weeks'] . ' Weeks';
if ($dateIntervals['weeks'] == 1) {
$dateWords = $dateIntervals['weeks'] . ' Week';
}
}
elseif ($dateIntervals['days'] > 0){
$dateWords = $dateIntervals['days'] . ' Days';
if ($dateIntervals['days'] == 1) {
$dateWords = $dateIntervals['days'] . ' Day';
}
}
elseif ($dateIntervals['hours'] > 0){
$dateWords = $dateIntervals['hours'] . ' Hours';
if ($dateIntervals['hours'] == 1) {
$dateWords = $dateIntervals['hours'] . ' Hour';
}
}
elseif ($dateIntervals['mins'] > 0){
$dateWords = $dateIntervals['mins'] . ' Mins';
if ($dateIntervals['mins'] == 1) {
$dateWords = $dateIntervals['mins'] . ' Min';
}
}
elseif ($dateIntervals['secs'] > 0){
$dateWords = $dateIntervals['secs'] . ' Secs';
if ($dateIntervals['secs'] == 1) {
$dateWords = $dateIntervals['secs'] . ' Sec';
}
}
else {
$dateWords = 'Just Now';
}
return $dateWords;
}
/**
* Convert Y/m/d to string date and find today's date
* Calculate difference between today's date and date passed as * variable.
* Store each interval in array
* @param datetime formatted date to find difference between
* @param datetime formatted date to find differnce between
* @return array of all time intervals
*/
public function get_intervals_date($datetime1, $datetime2)
{
$date1 = new DateTime($datetime1);
$date2 = new DateTime($datetime2);
$interval = date_diff($date1, $date2);
$years = $interval->format('%y');
$months = $interval->format('%m');
$weeks = $interval->format('%W');
$days = $interval->format('%d');
$hours = $interval->format('%h');
$mins = $interval->format('%i');
$secs = $interval->format('%s');
$dateIntervals = array(
'years' => $years,
'months' => $months,
'weeks' => $weeks,
'days' => $days,
'hours' => $hours,
'mins' => $mins,
'secs' => $secs,
);
return $dateIntervals;
}
/**
* Convert DATETIME format to Y/m/d format
* @param DATETIME
* @return string 'Y/m/d'
*/
public function get_string_time($datetime)
{
$datetime_str = strtotime($datetime);
$date_str = date('m/d/y', $datetime_str);
return $date_str;
}
/**
* Convert numbers into nearest thousand format to one decimal place
* (i.e. ---.- k, m, b, t)
* @param int number to be formatted
* @return string number formatted in nearest thousand format with trailing decimal place
*/
public function get_num_words($num)
{
if ($num > 999) {
$num_round = round($num);
$num_separated = number_format($num_round);
$num_array = explode(',', $num_separated);
$num_parts = array('k', 'm', 'b', 't');
$num_count_parts = count($num_array) - 1;
$num_display = $num_round;
// First part of thousand separated format (up to 3 digits). If the first digit of the second part of thousand separated format (the decimal in this case) does not equal 0, add decimal place and digit. Otherwise do not display 0 after decimal.
$num_display = $num_array[0] . ((int) $num_array[1][0] !== 0 ? '.' . $num_array[1][0] : '');
// Based on number of thousand separations -1 (for array starting at [0]) select k,m,b,t
$num_display .= $num_parts[$num_count_parts - 1];
return $num_display;
} else {
return $num;
}
}
}
引發錯誤的代碼行是（getViews()是從另一個控制器呼叫的方法）：
$data['views'] = get_num_words(getViews($viewkey));
uj5u.com熱心網友回復：
查看您的 system\Helpers*.php 檔案。他們都沒有課程。一些提示可以在https://codeigniter.com/user_guide/general/helpers.html找到
轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/485345.html