dongzhong5573 2014-09-07 15:58
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检查多个字符串的PHP Strlen

I have 4 fields from a previous page using an html form in the post method. Everything works fine except I am trying to check to make sure the strlens of each field are below 200. The following code always says that they are too long even though I am making sure they are way below 200.

PHP:

$hsname = trim($_POST['hsname']);
$hsstate = trim($_POST['hsstate']);
$hsemail = trim($_POST['hsemail']);
$hspassword = trim($_POST['hspassword']);

if (strlen($hsname) || strlen($hsstate) || strlen($hsemail) || strlen($hspassword) > 200){

die("Each field can only contain 200 characters");  //this is always returned even though the fields are below 200.
}
else {
echo "fields have good characters";
}
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4条回答 默认 最新

  • douzhan1963 2014-09-07 16:03
    关注

    I will translate Your if condition:

    if (strlen($hsname) || strlen($hsstate) || strlen($hsemail) || strlen($hspassword) > 200)
    

    It`s like:

    if(strlen($hasname)!='' || strlen($hsstate)!='' || strlen($hsemail)!='' || strlen($hspassword) > 200)
    

    So You should know why it`s wrong now ;) Compare every strlen or try that:

    $maximumValue = max(strlen($hsname), strlen($hsstate), strlen($hsemail), strlen($hspassword));
    // You got maximum value now, so:
    if($maximumValue > 200){}
    
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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