The issue you're facing stems from the deprecation of the `strftime()` function, which you are trying to replace with PHP's `date()` function. The custom calendar field you are creating should override the necessary parts to avoid this deprecation warning. Here’s a step-by-step approach to resolve the issue:
1. **Create a Custom Calendar Field Class**:
This class will override the Joomla `CalendarField` class where the `strftime` function is being used.
2. **Update XML Form File**:
Ensure the date format in the XML file uses the PHP `date()` format.
3. **Debugging and Troubleshooting**:
Add debugging statements to ensure your custom field class is correctly loaded and used.
Here's the refined approach:
### Step 1: Create a Custom Calendar Field Class
Create your custom calendar field class in the appropriate location, typically under `administrator/components/com_yourcomponent/models/fields/`.
#### CustomCalendarField.php
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php
<?php
defined('JPATH_BASE') or die;
use Joomla\CMS\Form\FormHelper;
use Joomla\CMS\Form\Field\CalendarField;
FormHelper::loadFieldClass('calendar');
class JFormFieldCustomCalendar extends CalendarField
{
protected function getInput()
{
// Debug statement to verify the custom field is loaded
error_log('Custom Calendar Field Loaded', 0);
// Override the format to remove '%' and translate it
$this->format = str_replace('%', '', $this->format);
$this->format = $this->translateFormat($this->format);
// Format the value if it exists
$value = $this->value ? date($this->format, strtotime($this->value)) : '';
// Set the formatted value
$this->value = $value;
// Call the parent getInput method
return parent::getInput();
}
private function translateFormat($format)
{
// Translate strftime format to date() format
$replacements = [
'Y' => 'Y',
'm' => 'm',
'd' => 'd',
'H' => 'H',
'M' => 'i',
'S' => 's',
];
return strtr($format, $replacements);
}
}
### Step 2: Update Your XML Form File
Ensure your format in the XML file uses PHP’s `date()` format.
#### form.xml
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xml
<?xml version="1.0" encoding="utf-8"?>
<form>
<fieldset name="event">
<field
name="id"
type="hidden"
label="JGLOBAL_FIELD_ID"
description="JGLOBAL_FIELD_ID_DESC"
/>
<field
name="event_start_date"
type="customcalendar"
label="START_DATE"
hint="ENTER_EVENT_START_DATE"
required="true"
showtime="true"
timeformat="12"
format="Y-m-d H:i:s" <!-- Correct format -->
/>
<field
name="event_end_date"
type="customcalendar"
hint="ENTER_EVENT_END_DATE"
label="END_DATE"
required="true"
showtime="true"
timeformat="12"
format="Y-m-d H:i:s" <!-- Correct format -->
/>
</fieldset>
</form>
### Step 3: Clear Cache and Validate Path
1. **Clear Cache**: Ensure Joomla's cache is cleared to reflect the changes.
2. **Validate Path**: Check if the custom field file is correctly placed in the expected directory.
3. **Check Overrides**: Ensure there are no other overrides or plugins affecting the `calendar` field type.
4. **Check PHP Error Logs**: Add a debug statement to confirm the custom field is loaded.
### Additional Debugging
Check your PHP error logs to see if the debug message appears. If the custom field is not loaded, there may be an issue with how the custom field class is defined or included.
By following these steps, you should be able to override the deprecated `strftime` function and ensure your calendar fields are clickable and functional without any deprecation warnings.
