PHP trim () Form validation is not an empty instance

Last Update:2017-09-14 Source: Internet

Author: User

Keywords Web Programming PHP Tutorials

Tags address data echo email entry-level function how to how to use

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PHP Tutorial trim () Form validation is not an empty instance, it should be an entry-level instance, telling you how to use the trim function to remove a space and then determine if the user is submitting data that is empty.

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

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

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

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

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

<tr>
<td><b>primary email:</b></td>
<td><input type= "text" name= "email" ></td>
<TD width= > </td>
<td>secondary email:</td>
<td><input type= "text" name= "SecondaryEmail" ></td>
</tr>

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

<tr>
<td>office address:</td>
<td><input type= "text" name= "Officeaddres1" ></td>
<TD width= > </td>
<td>home address:</td>
<td><input type= "text" name= "HomeAddress" ></td>
</tr>

<tr>
<td>state:</td>
<td><input type= "text" name= "Officestate" ></td>
<TD width= > </td>
<td> </td>
<td><input type= "text" name= "Homestate" ></td>
</tr>

<tr>
<td>phone:</td>
<td><input type= "text" name= "Officephone" ></td>
<TD width= > </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= > </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>

</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 the form, and correct error (s);

?>

</body>
</html>

It's a simple validation function.

<?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;
}
?>

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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