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filter is not described

attribute_escape filter-hook . WP 2.0.6

Filters a string cleaned and escaped for output in an HTML attribute.

Text passed to esc_attr() is stripped of invalid or special characters before output.

Usage

add_filter( 'attribute_escape', 'filter_function_name_4801', 10, 2 );
function filter_function_name_4801( $safe_text, $text ){
	// filter...

	return $safe_text;
}
$safe_text(string)
The text after it has been escaped.
* @param string $text The text prior to being escaped.
$text
-

Where the hook is called

esc_attr()
attribute_escape
wp-includes/formatting.php 3991
return apply_filters( 'attribute_escape', $safe_text, $text );

Where the hook is used (in WP core)

Does not used.