error checking keywords

[DuaneCawaling]

Type SMART[space]WALLET[space]keyword*

KEYWORDS:
register[space]password
bal
menu
drinks
snacks
buy[space]qty-item_keyword ex: ADZU WALLETbuy 1-M1,1-M2,3-S1
pass[space]password ex: ADZU WALLET pass 12345

 

i want to check all the errors that may occur in the scenario of inputing the different keywords.

for example:

ADZU WALLET pass

in this string, the error would be that there is no password ..a message should be shown to the user that it is an error

 

please help me check every possible error and scenario

[Christian F.]

What have you tried?

 

This section is for getting help with code that you're writing yourself, but have gotten stuck on for some reason. It's not for getting us to write the code for you, but for us to help you learn to do it yourself.

 

If you want others to do it for you, you'll need to post in the Freelancer section. Also, be prepared that this will most likely cost you money.

[DuaneCawaling]

<?php
echo ('Type <strong>ADZU</strong>[space]<strong>UEW</strong>[space]<em>keyword</em>*')."<br />";
echo "<em>KEYWORDS</em>:"."<br />".
		"<strong>register</strong>[space]<em>password</em>"."<br>"
		."<strong>bal</strong>"."<br />"."<strong>menu</strong>"."<br />"."<strong>drinks</strong>"."<br />"
		."<strong>snacks</strong>"."<br />"."<strong>buy</strong>[space]<em>qty-item_keyword</em> ex: ADZU UEW buy 1-M1"."<br />"
		."<strong>pass</strong>[space]<em>password</em>"."<br />";
?>
<form action="keyword.php" method="post">
 Message: <input type="text" name="message">
 Contact no.: <input type="text" name="number">
 <input type="submit">
 </form>

 

this is the code for asking message and mumber

 

<?php
$str_full = "$_POST[message]";		//full message
$number = "$_POST[number]";		//contact number
$message = explode(" ",$str_full);
$str_keyword = strtolower($message[2]); //----->message [2]

echo iskeyword($str_full,$str_keyword);

function iskeyword($word,$dummy){
	if($dummy == "register"){
		$msg = substr($word,17);
		$msg1 = str_replace(' ','',$msg);
		return $msg1;
	}else
	if($dummy == "bal"){
		$msg = substr($word,12);
		$msg1 = str_replace(' ','',$msg);
		return $msg1;
	}
	if($dummy == "buy"){
		$msg = substr($word,12);
		$msg1 = str_replace(' ','',$msg);
		return $msg1;
	}
}
?>

 

this is the part im checking for errors in some keywords, im still in the process of finishing the codes 

[Christian F.]

I don't see any attempts to check for missing input there, at all. Nor do I see any specific questions as to what you're having a difficulty with. So I'm forced to assume that you haven't tried to solve this on your own, at all, and is just looking for people to work for free.

As previously noted: This is not the correct section for that.

[DuaneCawaling]

im sorry for the wrong use of section. i would post the working codes after. thank you and i apologize for the inconvenience