wp_kses_check_attr_val()

wp_kses_check_attr_val() — Performs different checks for attribute values. The currently implemented checks are “maxlen”, “minlen”, “maxval”, “minval”, and “valueless”.

Inputs: $value (string): Attribute value. $vless (string): Whether the attribute is valueless. Use ‘y’ or ‘n’. $checkname (string): What $checkvalue is checking for. $checkvalue (mixed): What constraint the value should pass.

Returns bool: Whether check passes.