驗證 IP 地址
驗證值是有效的 IP 地址
var_dump(filter_var('185.158.24.24', FILTER_VALIDATE_IP));
var_dump(filter_var('2001:0db8:0a0b:12f0:0000:0000:0000:0001', FILTER_VALIDATE_IP));
var_dump(filter_var('192.168.0.1', FILTER_VALIDATE_IP));
var_dump(filter_var('127.0.0.1', FILTER_VALIDATE_IP));
結果:
string(13) "185.158.24.24"
string(39) "2001:0db8:0a0b:12f0:0000:0000:0000:0001"
string(11) "192.168.0.1"
string(9) "127.0.0.1"
驗證有效的 IPv4 IP 地址:
var_dump(filter_var('185.158.24.24', FILTER_VALIDATE_IP, FILTER_FLAG_IPV4));
var_dump(filter_var('2001:0db8:0a0b:12f0:0000:0000:0000:0001', FILTER_VALIDATE_IP, FILTER_FLAG_IPV4));
var_dump(filter_var('192.168.0.1', FILTER_VALIDATE_IP, FILTER_FLAG_IPV4));
var_dump(filter_var('127.0.0.1', FILTER_VALIDATE_IP, FILTER_FLAG_IPV4));
結果:
string(13) "185.158.24.24"
bool(false)
string(11) "192.168.0.1"
string(9) "127.0.0.1"
驗證有效的 IPv6 IP 地址:
var_dump(filter_var('185.158.24.24', FILTER_VALIDATE_IP, FILTER_FLAG_IPV6));
var_dump(filter_var('2001:0db8:0a0b:12f0:0000:0000:0000:0001', FILTER_VALIDATE_IP, FILTER_FLAG_IPV6));
var_dump(filter_var('192.168.0.1', FILTER_VALIDATE_IP, FILTER_FLAG_IPV6));
var_dump(filter_var('127.0.0.1', FILTER_VALIDATE_IP, FILTER_FLAG_IPV6));
結果:
bool(false)
string(39) "2001:0db8:0a0b:12f0:0000:0000:0000:0001"
bool(false)
bool(false)
驗證 IP 地址不在私有範圍內:
var_dump(filter_var('185.158.24.24', FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE));
var_dump(filter_var('2001:0db8:0a0b:12f0:0000:0000:0000:0001', FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE));
var_dump(filter_var('192.168.0.1', FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE));
var_dump(filter_var('127.0.0.1', FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE));
結果:
string(13) "185.158.24.24"
string(39) "2001:0db8:0a0b:12f0:0000:0000:0000:0001"
bool(false)
string(9) "127.0.0.1"
驗證 IP 地址不在保留範圍內:
var_dump(filter_var('185.158.24.24', FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE));
var_dump(filter_var('2001:0db8:0a0b:12f0:0000:0000:0000:0001', FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE));
var_dump(filter_var('192.168.0.1', FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE));
var_dump(filter_var('127.0.0.1', FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE));
結果:
string(13) "185.158.24.24"
bool(false)
string(11) "192.168.0.1"
bool(false)