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I have an input text area which when filled out and sent, puts whatever was typed in into the variable
$input
This is then put through an if statement to check whether or not its the letter a. If it is then echo - you wrote the letter a, else - you did not write the letter a.
<?php
$input = $_POST["textarea"];
echo $input;
echo "<br />";
if($input = "a"){
echo "You wrote a";
}else{
echo "You did not write a";
}
?>
It does work, but in the wrong way. Every letter I type in comes as 'You wrote a'. I only want it to echo this if the user typed a. Otherwise, echo 'You did not write a' .
EDIT: When I try == instead of = it says 'You did not write a' for everything. Even when I type a.
EDIT 2: When I try the string compare parameter, It didnt work. Any suggestions where I am going wrong?
FULL SCRIPTS OF BOTH PAGES:
index.php
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<h1>Fun Translator</h1>
<form method="post" action="query.php">
<textarea name="textarea" id="textarea">
</textarea>
<input type="submit" name="send" value="Translate" />
</form>
</body>
</html>
query.php
<?php
$input = $_POST["textarea"];
echo $input;
echo "<br />";
if(strcmp($input,'a')==0){
echo "You wrote a";
}else{
echo "You did not write a";
}
?>
Solution:
trim()
849
== is the conditional for comparison. = is the assignment operator.
if($input == "a"){
echo "You wrote a";
}else{
echo "You did not write a";
}
You might want to use strcmp as it is binary-safe.
if(strcmp($input,'a')==0){
echo "You wrote a";
}else{
echo "You did not write a";
}
http://php.net/manual/en/language.operators.comparison.php
http://php.net/manual/en/function.strcmp.php
EDIT: Taking another stab here - in your code as posted (I copy pasted it) you have whitespace in your textarea by default.
Don't put a line break between the and tags. This adds whitespace to the start of 'a'.
Removing this made it work properly in my test.
EDIT: As per the accepted answer and reposted code, trim() is in fact the proper function to remove all leading and trailing whitespace.
169
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