php正则表达式实例

1。判断字符串是否为空，非空时检测输入字符串是否为汉字、平假名、片假名或全角数字

if (empty($paymentway->bank_name)) {
    $_REQUEST["ERROR_MESSAGE"] = BANK_NAME_NOT_INPUT;
    $_REQUEST["PAYMENT_EDIT_SEARCH_RESULT"] = $paymentway;
    $doContinueFlg = false;
}else if(!mb_ereg("^([一-龠]|[ぁ-ん]|[ァ-ヴ]|[ａ-ｚＡ-Ｚ０-９])+$",$paymentway->bank_name)){
    $_REQUEST["ERROR_MESSAGE"] = BANK_NAME_INPUT_ERROR;
    $_REQUEST["PAYMENT_EDIT_SEARCH_RESULT"] = $paymentway;
    $doContinueFlg = false;
}

 2。判断字符串是否为空，非空时检测输入字符串是否为数字

if(empty($paymentway->bank_account)){
    $_REQUEST["ERROR_MESSAGE"] = BANK_ACCOUNT_NOT_INPUT;
    $_REQUEST["PAYMENT_EDIT_SEARCH_RESULT"] = $paymentway;
    $doContinueFlg = false;
}else{
           if(!is_numeric($paymentway->bank_account)){
                          $_REQUEST["ERROR_MESSAGE"] = BANK_ACCOUNT_NOT_ILLEGAL;
                          $_REQUEST["PAYMENT_EDIT_SEARCH_RESULT"] = $paymentway;
                          $doContinueFlg = false;
    }                
}

3。判断字符串是否为空，非空时检测输入字符串是否合法邮编

if(empty($paymentway->post_office_mark)){
    $_REQUEST["ERROR_MESSAGE"] = POST_OFFICE_MARK_NOT_INPUT;
    $_REQUEST["PAYMENT_EDIT_SEARCH_RESULT"] = $paymentway;
    $doContinueFlg = false;            
}else{
    if(!mb_ereg("^[0-9]{3}[-]?[0-9]{4}$",$paymentway->post_office_mark)){
        $_REQUEST["ERROR_MESSAGE"] = POST_OFFICE_MARK_NOT_ILLEGAL;
        $_REQUEST["PAYMENT_EDIT_SEARCH_RESULT"] = $paymentway;
        $doContinueFlg = false;
    }
}