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All the submitted fields are available in $_POST array. So we can iterate over this array to check if the value of required fields are exist or not.The code is as follows:
<?php
$post = $_POST;
if(count($post) > 0) {
foreach($post as $key => $value) {
if(empty($post[$key])) {
$message = $key . " is required!";
break;
}
}
}
?>
I want to this action:
For example when the username field is empty the message is printed input1 is required!. input1 is same the name of the username field.
I want to echo username is required but without changing name of the username field.
For example, a code like the following, but does not work and I do not know where and how!
if($key == 'input1'){
$key = 'username';
}
else
if($key == 'input2'){
$key = 'password';
}
Form and inputs elements in the following code:
<html>
<head>
<style>
.tableheader {
background-color: #CCC;
color:white;
font-weight:bold;
}
.tablerow {
background-color: #f9f9f9;
color: #333;
}
.message {
color: #FF0000;
font-weight: bold;
text-align: center;
width: 100%;
padding: 10;
}
</style>
</head>
<body dir="rtl">
<div align="center" class="message"><?php if(isset($message)) echo $message; ?></div>
<form name="registrationform" method="post" action="" style="direction: ltr">
<table border="0" cellpadding="10" cellspacing="1" width="500" align="center">
<tr class="tableheader">
<td align="center" colspan="2">Registration Form</td>
</tr>
<tr class="tablerow">
<td align="right">Username</td>
<td><input type="text" name="input1" value="<?php if(isset($_POST['input1'])) echo $_POST['input1']; ?>"></td>
</tr>
<tr class="tablerow">
<td align="right">Password</td>
<td><input type="password" name="input2" value="<?php if(isset($_POST['input2'])) echo $_POST['input2']; ?>"></td>
</tr>
<tr class="tableheader">
<td align="center" colspan="2"><input type="submit" name="submit" value="Submit"></td>
</tr>
</table>
</form>
</body></html>
304
asked Aug 09 '26 21:08
If understood correctly... you need another array where you'd keep a "map" of your input fields' names and their actual "human" names. Something like:
$fields_map = array(
'input1' => 'Username',
'input2' => 'Password',
'whatever' => 'something'
)
..then, when you want to output the message to user, then you'd do something like:
if(empty($post[$key])) {
$message = $fields_map[$key] . " is required!";
}
You have to use a switch statement or find a way to map the actual names you want to display, e.g username to the form names, e.g input1.
An example of such mapping is presented below:
$map = array('input1'=>'username', 'input2'=>'surname', 'input3'=>'othernames');
$post = $_POST;
if(count($post) > 0) {
foreach($post as $key => $value) {
if(empty($post[$key])) {
$message = $map[$key] . " is required!";
break;
}
}
}
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