php開發中trim()表單驗證不爲空的代碼實例

時間 2019-11-11

標籤 php 開發 trim 表單驗證不爲空的代碼實例欄目 PHP 简体版

原文原文鏈接

php開發中trim()表單驗證不爲空的代碼實例，應該算是入門級的實例了，告訴你如何利用trim函數來刪除空格而後判斷用戶提交的數據是否爲空。php

<html>
<body>
<form method="post" action="formerrorcheck.php">
<h1>contact information</h1>
<table>html

<tr>
<td><b>nickname:</b></td>
<td><input type="text" name="nickname"></td>
</tr>函數

<tr>
<td>title:</td>
<td><input type="text" name="title"></td>
</tr>post

<tr>
<td><b>first name:</b></td>
<td><input type="text" name="firstname"></td>
</tr>ui

<tr>
<td>middle name:</td>
<td><input type="text" name="middlename"></td>
</tr>orm

<tr>
<td><b>last name:</b></td>
<td><input type="text" name="lastname"></td>
</tr>htm

<tr>
<td><b>primary email:</b></td>
<td><input type="text" name="email"></td>
<td width="20"> </td>
<td>secondary email:</td>
<td><input type="text" name="secondaryemail"></td>
</tr>ip

<tr>
<td>company name:</td>
<td><input type="text" name="companyname"></td>
</tr>ci

<tr>
<td>office address:</td>
<td><input type="text" name="officeaddres1"></td>
<td width="20"> </td>
<td>home address:</td>
<td><input type="text" name="homeaddress"></td>
</tr>開發

<tr>
<td></td>
<td><input type="text" name="officeaddress2"></td>
</tr>

<tr>
<td>city:</td>
<td><input type="text" name="officecity"></td>
<td width="20"> </td>
<td> </td>
<td><input type="text" name="homecity"></td>
</tr>

<tr>
<td>state:</td>
<td><input type="text" name="officestate"></td>
<td width="20"> </td>
<td> </td>
<td><input type="text" name="homestate"></td>
</tr>

<tr>
<td>zip:</td>
<td><input type="text" name="officezip"></td>
<td width="20"> </td>
<td> </td>
<td><input type="text" name="homezip"></td>
</tr>

<tr>
<td>phone:</td>
<td><input type="text" name="officephone"></td>
<td width="20">&www.3ppt.com;</td>
<td> </td>
<td><input type="text" name="homephone"></td>
</tr>

<tr>
<td>birthday:</td>
<td><input type="text" name="birthday"></td>
</tr>

<tr>
<td>spouse name:</td>
<td><input type="text" name="spousename"></td>
<td width="20"> </td>
<td>childrens' names:</td>
<td><input type="text" name="children"></td>
</tr>

<tr>
<td>anniversary:</td>
<td><input type="text" name="anniversary"></td>
</tr>

</table>

<br>
<br>
<br>
<input type="submit" value="submit">
<br>
<br>
<input type="reset" value="clear the form">

</form>
</body>
</html>

<!-- formerrorcheck.php
<html>
<body>
<?php

$errors=0;
if (!trim($nickname)) {
      echo "<br><b>nickname</b> is required.";
     $errors++;
}

if (!trim($firstname)) {
      echo "<br><b>first name</b> is required.";
     $errors++;
}

if (!trim($lastname)) {
      echo "<br><b>last name</b> is required.";
      $errors++;
}

if (!trim($email)) {
      echo "<br><b>primary email address</b> is required.";
      $errors++;
}

if ($errors > 0)
      echo "<br><br><br>please use your browser's back button " .
        "to return to the form, and correct error(s)";

?>

</body>
</html>

這是個簡單的驗證函數

<?php function phone_validate($data, $desc) { $regex = "/^([2-9][0-9]{2})[2-9][0-9]{2}-[0-9]{4}/i"; if(preg_match($regex, $data) != 1) { return "the '$desc' field isn't valid!"; } return true; } ?>