PHP身份证验证函数

身份证效验: 15位身份证验证 18位身份证验证

<?php
function checkidentity($identity) {
    $id = strtoupper ( $identity );
    $regx = "/(^\d{15}$)|(^\d{17}([0-9]|X)$)/";
    $arr_split = array ();
    if (! preg_match ( $regx, $id )) 
    {
        return FALSE;
    }

    if (15 == strlen ( $id )) //检查15位  
    {
        $regx = "/^(\d{6})+(\d{2})+(\d{2})+(\d{2})+(\d{3})$/";
        @preg_match ( $regx, $id, $arr_split );
        //检查生日日期是否正确  
        $dtm_birth = "19" . $arr_split [2] . '/' . $arr_split [3] . '/' . $arr_split [4];
        if (! strtotime ( $dtm_birth )) 
        {
            return FALSE;
        } else {
            return TRUE;
        }
    } 
    else //检查18位  
    {
        $regx = "/^(\d{6})+(\d{4})+(\d{2})+(\d{2})+(\d{3})([0-9]|X)$/";
        @preg_match ( $regx, $id, $arr_split );
        $dtm_birth = $arr_split [2] . '/' . $arr_split [3] . '/' . $arr_split [4];
        if (! strtotime ( $dtm_birth )) //检查生日日期是否正确  
        {       
            return FALSE;
        } else{
            //检验18位身份证的校验码是否正确。  
            //校验位按照ISO 7064:1983.MOD 11-2的规定生成,X可以认为是数字10。  
            $arr_int = array (7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 );
            $arr_ch = array ('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2' );
            $sign = 0;
            for($i = 0; $i < 17; $i ++) {
                $b = ( int ) $id {$i};
                $w = $arr_int [$i];
                $sign += $b * $w;
            }
            $n = $sign % 11;
            $val_num = $arr_ch [$n];
            if ($val_num != substr ( $id, 17, 1 )) {
                return FALSE;
            } else {
                return TRUE;
            }
        }
    }
}
?>

Leave a Reply

(will not be published)