Using WordPress ‘did_filter()’ PHP function

by

The did_filter() WordPress PHP function retrieves the number of times a filter has been applied during the current request.

Usage

To use did_filter(), you need to provide the name of the filter hook for which you want to check the count. Here’s a simple example:

$hook_name = 'init';
$filter_count = did_filter($hook_name);
echo $filter_count;

In this example, the function will return the number of times the ‘init’ filter has been applied during the current request.

Parameters

  • $hook_name (string) – The name of the filter hook.

More information

See WordPress Developer Resources: did_filter()

Please note, this function is not deprecated and it is part of the WordPress core.

Examples

Checking the ‘init’ filter

$hook_name = 'init';
$filter_count = did_filter($hook_name);
echo $filter_count;

This code will print out the number of times the ‘init’ filter has been applied during the current request.

Checking the ‘the_content’ filter

$hook_name = 'the_content';
$filter_count = did_filter($hook_name);
echo $filter_count;

This code checks the number of times ‘the_content’ filter has been used in the current request.

Checking the ‘admin_init’ filter

$hook_name = 'admin_init';
$filter_count = did_filter($hook_name);
echo $filter_count;

This snippet checks the ‘admin_init’ filter’s count.

Checking a custom filter

$hook_name = 'my_custom_filter';
$filter_count = did_filter($hook_name);
echo $filter_count;

This code checks the application count of a custom filter named ‘my_custom_filter’.

Conditional logic based on filter count

$hook_name = 'init';
$filter_count = did_filter($hook_name);
if($filter_count > 5) {
    echo "Filter 'init' has been used more than 5 times.";
} else {
    echo "Filter 'init' has been used 5 times or less.";
}

This code checks if the ‘init’ filter has been used more than 5 times and outputs a message accordingly.