<?phpprint_r(filter_list());?>输出类似：Array([0] => int[1] => boolean[2] => float[3] => validate_regexp[4] => validate_url[5] => validate_email[6] => validate_ip[7] => string[8] => stripped[9] => encoded[10] => special_chars[11] => unsafe_raw[12] => email[13] => url[14] => number_int[15] => number_float[16] => magic_quotes[17] => callback)【php】 自带的过滤机制
原文地址：https://www.cnblogs.com/china-flint/p/9684945.html