如何验证PHP表单中的数组？

问题描述：

I'm fairly new to php and was wondering how do I validate the array for the states and where do I place the php code at? I already did the address part but I'm stuck at the states part.

Here is the validation code.

if (isset($_POST['contact_info_submitted'])) { // Handle the form.

    $address = mysqli_real_escape_string(htmlentities($_POST['address']));

}

Here is the form code.

<li><label for="address-1">Address 1: </label><input type="text" name="address-1" id="address-1" size="25" class="input-size" value="<?php if (isset($_POST['address'])) echo $_POST['address']; ?>" /></li>

<li><label for="state-province">State/Province: </label>
<?php
echo '<select name="state-province" id="state-province">' . "
";
    foreach($state_options as $option) {
        if ($option == $state) {
            echo '<option value="' . $option . '" selected="selected">' . $option . '</option>' . "
";
            } else {
              echo '<option value="'. $option . '">' . $option . '</option>'."
";
            }
        }
            echo '</select>';

?>
</li>
<li><input type="submit" name="submit" value="Save Changes" class="save-button" />
    <input type="hidden" name="contact_info_submitted" value="true" />

我对php很新，我想知道如何验证数组的状态以及我在哪里放置 php代码在？我已经完成了地址部分，但是我被困在状态部分。 p>

这是验证码。 p>

  if（isset）  （$ _POST ['contact_info_submitted']））{//处理表单。
 
 $ address = mysqli_real_escape_string（htmlentities（$ _ POST ['address']））; 
 
} 
  code>  
 
 这是表单代码。 p> 
 
 
 ＆lt; li＆gt;＆lt; label for =“address-1”＆gt;地址1：＆lt;  ; / label＆gt;＆lt; input type =“text”name =“address-1”id =“address-1”size =“25”class =“input-size”value =“＆lt;？php if（isset（$）  _POST ['address']））echo $ _POST ['address'];？＆gt;“  /＆gt;＆lt; / li＆gt; 
 
＆lt; li＆gt;＆lt; label for =“state-province”＆gt;州/省：＆lt; / label＆gt; 
＆lt;？php 
echo'＆lt; select name =“ 州 - 省“id =”州 - 省“＆gt;”  。  “
”; 
 foreach（$ state_options as $ option）{
 if（$ option == $ state）{
 echo'＆lt; option value =“'。$ option。'”selected =“selected”  ＆GT;”  。  $选项。  '＆LT; /选项＆GT;'  。  “
”; 
}其他{
 echo'＆lt; option value =“'。$ option。'”＆gt;'  。  $选项。  '＆lt; / option＆gt;'。“
”; 
} 
} 
 
回音'＆lt; / select＆gt;'; 
 
？＆gt; 
＆lt; / li＆gt; 
＆lt; li＆gt;＆lt;  input type =“submit”name =“submit”value =“Save Changes”class =“save-button”/＆gt; 
＆lt; input type =“hidden”name =“contact_info_submitted”value =“true”/＆gt;  
  code>  pre> 
  div>

答

If you're wondering how to check if someone submitted a valid value for state just check to see if there value they posted is in your array of states. If it's not there it's not valid:

if (!in_array($_POST['state-province'], $state_options)) {
    // not valid
}

If you're just trying to store in the a database like the other form values it's no different then any text field:

if (isset($_POST['contact_info_submitted'])) { // Handle the form.
    $state= mysqli_real_escape_string($_POST['state-province']);
}

如何验证PHP表单中的数组？

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