Quote:
Originally Posted by GrouchyAdmin
Not quite. For PHP, anything that isn't 0 is considered to be legitimate. I used a ternary operator because I love 'em.
Another way of writing it would be if ($test != FALSE) { echo "Found." } else { echo "Not found." }
See the link on strpos above; my shorthand was a little difficult to read if you're not familiar with the nuances of PHP, but it's valid.
Code:
<?php
$data="hello";
$testfor="h";
$test=strpos($data, $testfor);
echo ($test != FALSE) ? "'$testfor' found in '$data'.\n" : "'$testfor' not found in '$data'.\n";
?>
It's precisely the same, only with more text in it. As noted, 0 has the same value as FALSE, so unless you explicitly test for it, you can have nasty results. |
It's precisely the same in the sense that both methods are completly wrong.
If you program in C, then you know that strpos is not a boolean function.
It
MAY return a boolean value but it will also return an interger which is
0 ,
which is confused as boolean zero. But, in this fuction, zero is not a boolean value yet you tried to evaluate it at as such.
You have to tell php that you want to perform an
incongruent comparison by using the "===" operator.
http://en.wikipedia.org/wiki/Congruent
See zero and FALSE are not EQUAL but the are congruent!
The "===" says "ignore congruence" and find exact equivalency to
FALSE.
See you can read all the stuff you want on the internet but it obvioulsy can't replace my education that a boolean function returns either zero or one.
If it returns anything else then don't do a boolean test on it.
I didn't know php had "===" but I still would have gotten it right because the code you did is just wrong wrong wrong wrong wrong and I would have never written that, because I know what a boolean value is.
I never wrote even one line of php code and I saw that right away in your example. But yet you still can't see that.
http://us2.php.net/strpos
Quote:
|
Originally Posted by http://us2.php.net/strpos
Warning
This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE, such as 0 or "". Please read the section on Booleans for more information. Use the === operator for testing the return value of this function.
|
The manual tells you that.
I told you that.
I never read the manual until 5 mins ago and already knew that.
But you don't want to hear that.
Which proves one thing.
Progammers may not be incompetent, but they sure are
Fucking Hard Headed
So I back down on my "self taught programmer can write good code" statement.
Go to fucking college like I did.