What steps can be taken to troubleshoot when a pre-filter in Smarty is not working as expected?

If a pre-filter in Smarty is not working as expected, you can troubleshoot the issue by checking the syntax of the pre-filter function, ensuring it is properly registered with Smarty, and verifying that the pre-filter function is being applied to the template. Additionally, you can try clearing the Smarty cache to see if that resolves the issue. 

// Check the syntax of the pre-filter function
function myPreFilter($tpl_source, $smarty) {
    // Pre-filter logic here
    return $tpl_source;
}

// Register the pre-filter function with Smarty
$smarty->registerFilter('pre', 'myPreFilter');

// Verify that the pre-filter function is being applied to the template
$smarty->display('template.tpl');

// Clear the Smarty cache
$smarty->clearAllCache();

Keywords

Smarty pre-filter troubleshooting PHP error

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