case statement failing.

[stockton]

Please tell me what stupid mistake I have made in the following code.

<?php
$operator = fgets(STDIN);
$operator = $operator[0];
echo "\n".$operator."\n";
switch ($operator) {
case '+':
   echo "Plus";
   break;
case '-':
   echo "Minus";
   break;
}
?>

 

The switch never finds a case for either operator. Why?

[trq]

Obviously because $operator never equals + or -

[stockton]

Not too obvious to me and that was why I did the echo.

echo "\n".$operator."\n"

To see what it contained. It prints the plus sign.

[n3ssi3]

Have you tried with trim() ? maybe you have a space or something in $operator ... but if i set $operator = array('-','+');

it works nothing wrong with you're switch case

[stockton]

However if the user types the + or - on the keyboard it fails.

[n3ssi3]

However if the user types the + or - on the keyboard it fails.

macbookpro:~ phptest$ php test.php 
+

+
Plus
macbookpro:~ phptest$ php test.php 
-

-
Minus

 

sry but it works for me...even with STDIN ...

 

Have you other code in the script ? maybe there is the error...

 

 

 

 

[oni-kun]

However if the user types the + or - on the keyboard it fails.

 

<?php
$operator = fgets(STDIN);
echo var_dump ($operator) . "<br/>\n";
echo ord(trim($operator[0]));
?>

 

Please post the results of this.

What you are most likely getting is something encoded, or as mentioned an untrimmed character. This will verify it 'bit by bit' to prove your point.

[stockton]

The following now works but I don't understand what changed to make it work.

<?php
$operator = fgets(STDIN);
$operator = $operator[0];
echo var_dump ($operator) . "<br/>\n";
echo ord(trim($operator[0]));
// echo "\n".$operator."\n";
switch ($operator) {
case '+':
   echo "\nPlus\n";
   break;
case '-':
   echo "\nMinus\n";
   break;
}
?>

the result of the above is:-

php Switch.php
+
string(1) "+"
<br/>
43
Plus