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PHP 身份证号验证函数

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2017-03-23 10:48:421595browse

PHP 身份证号验证函数

function validation_filter_id_card($id_card) 
{ 
if(strlen($id_card) == 18) 
{ 
return idcard_checksum18($id_card); 
} 
elseif((strlen($id_card) == 15)) 
{ 
$id_card = idcard_15to18($id_card); 
return idcard_checksum18($id_card); 
} 
else 
{ 
return false; 
} 
} 
// 计算身份证校验码,根据国家标准GB 11643-1999 
function idcard_verify_number($idcard_base) 
{ 
if(strlen($idcard_base) != 17) 
{ 
return false; 
} 
//加权因子 
$factor = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2); 
//校验码对应值 
$verify_number_list = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'); 
$checksum = 0; 
for ($i = 0; $i < strlen($idcard_base); $i++) 
{ 
$checksum += substr($idcard_base, $i, 1) * $factor[$i]; 
} 
$mod = $checksum % 11; 
$verify_number = $verify_number_list[$mod]; 
return $verify_number; 
} 
// 将15位身份证升级到18位 
function idcard_15to18($idcard){ 
if (strlen($idcard) != 15){ 
return false; 
}else{ 
// 如果身份证顺序码是996 997 998 999,这些是为百岁以上老人的特殊编码 
if (array_search(substr($idcard, 12, 3), array(&#39;996&#39;, &#39;997&#39;, &#39;998&#39;, &#39;999&#39;)) !== false){ 
$idcard = substr($idcard, 0, 6) . &#39;18&#39;. substr($idcard, 6, 9); 
}else{ 
$idcard = substr($idcard, 0, 6) . &#39;19&#39;. substr($idcard, 6, 9); 
} 
} 
$idcard = $idcard . idcard_verify_number($idcard); 
return $idcard; 
} 
// 18位身份证校验码有效性检查 
function idcard_checksum18($idcard){ 
if (strlen($idcard) != 18){ return false; } 
$idcard_base = substr($idcard, 0, 17); 
if (idcard_verify_number($idcard_base) != strtoupper(substr($idcard, 17, 1))){ 
return false; 
}else{ 
return true; 
} 
}

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