#include <amxmodx>
    #include <amxmisc>
    #include <fun>
    #include <regex>
    #define MAX_PLAYERS 32
    #define MAXINPUT 7
    #define SANITARY "abcdefg"
    new bool:g_restart_attempt[MAX_PLAYERS + 1]
    new amx_show_activity
    //new hitbox_allow_knife
    //new hitbox_allow_he
    new hitbox_bit
    public plugin_init(){
    register_plugin("Hitbox Manipulator", "1.00", "Migs Davis")
    register_event("ResetHUD", "event_hud_reset", "be")
    register_event("TextMsg", "event_restart_attempt", "a", "2=#Game_will_restart_in")
    register_clcmd("fullupdate", "clcmd_fullupdate")
    register_concmd("amx_hitbox", "admin_set_hitbox", ADMIN_KICK, "<0|a|b|c|d|e|f|g> - Set hitboxes. Letters equal the body part, can combine letters.")
    //hitbox_allow_knife = register_cvar("hitbox_allow_knife", "1")
    //hitbox_allow_he = register_cvar("hitbox_allow_he", "1")
    hitbox_bit = register_cvar("hitbox_bit", "255")
    amx_show_activity = get_cvar_pointer("amx_show_activity")
    }
    public clcmd_fullupdate() {
    return PLUGIN_HANDLED
    }
    public event_restart_attempt(){
    new players[32], num
    get_players(players, num, "a")
    for ( new i; i < num; ++i )
    g_restart_attempt[players[i]] = true
    }
    public event_hud_reset(id){
    if (g_restart_attempt[id]) {
    g_restart_attempt[id] = false
    return
    }
    set_properties(id)
    }
    public set_properties(id){
    set_user_hitzones(0, 0, get_pcvar_num(hitbox_bit))
    }
    public admin_set_hitbox(id, level, cid){
    new flags[MAXINPUT+1], name[32], error[128], result_code, bit = 1
    if ( !cmd_access(id, level, cid, 2) )
    return PLUGIN_HANDLED
    read_argv(1, flags, MAXINPUT)
    strtolower(flags)
    new Regex:re = regex_match(flags, "0", result_code, error, 127)
    if (re >= REGEX_OK) { //This if/else will detect strange syntax, even if it doesn't need to
    regex_free(re)
    if (flags[0] == '0') {
    if (flags[1] == '^0'){
    bit = 0;
    } else {
    bit = 0; //they have a 0 followed by unnecessary characters
    }
    } else{
    bit = 1 // there is a 0 mixed in with other characters
    }
    } else {
    new buf[2] = {0,0}
    for (new i = 0; i<MAXINPUT; i++){
    buf[0] = flags[i];
    re = regex_match(SANITARY, buf[0], result_code, error, 127)
    if (re >= REGEX_OK){
    regex_free(re)
    } else {
    flags[i] = 0 //They have weird characters in here
    }
    }
    }
    if (bit) {
    new buf2[2] = {97,0} //97 = a.
    for (new j = 2; j <= 128; j*=2, buf2[0]++){
    re = regex_match(flags, buf2, result_code, error, 127)
    if (re >= REGEX_OK){
    regex_free(re)
    bit += j
    }
    }
    }
    if (bit == 1){
    //They didn't type any valid flags at all
    }
    set_pcvar_num(hitbox_bit, bit)
    get_user_name(id, name, 31)
    switch ( get_pcvar_num(amx_show_activity) ){
    case 2:	client_print(0, print_chat, "[AMXX] ADMIN %s has manipulated the hitboxes!", name)
    case 1:	client_print(0, print_chat, "[AMXX] ADMIN has manipulated the hitboxes!")
    }
    set_properties(0)
    log_amx("[AMXX] ADMIN %s: set hitboxes to %d", name, bit)
    return PLUGIN_HANDLED
    }