"All" == 0?

[OBCENEIKON]

Can anyone tell me why this evaluates to true?

<?php

$selOpt = "All";
$key = 0;

if ($selOpt == $key) {

	echo "Match.";

} else {

	echo "No Match.";

}

?>

[lazzerous]

not entirely sure, but put some quotes around the zero and you'll be fine

<?php

$selOpt = "All";
$key = "0";

if ($selOpt == $key) {

    echo "Match.";

} else {

    echo "No Match.";

}

?> 

[OBCENEIKON]

quotes are a fix, but the question still remains....

😉

Also, not sure if quotes will be the fix in my function...this is actually used to select a key from an array and compare it with a value

[OBCENEIKON]

hmm, apparently
any sequence of letters is equal to 0

<?php

$selOpt = "asdfawefazfcawerawe";
$key = 0;

// This doesn't work either...
$key = settype($key, "string");

if ($selOpt == $key) {

	echo "Match.";

} else {

	echo "No Match.";

}

?>

[devinemke]

the results you are getting are consistent with the info contained in the PHP type comparison tables

[OBCENEIKON]

ahh, thank you...

I was searching for something like that...now to figure out how to fix it.

[tekky]

isn't that the purpose of the === operator?

$a === $b Identical TRUE if $a is equal to $b, and they are of the same type. (introduced in PHP 4)

[OBCENEIKON]

i tried that, wouldnt work

i have mixed values as array keys and for some reason it wouldnt compare right, but I did fix it however.

<?php

$selOpt = "All";
$key = 0;

if (gettype($key) == "integer") {

	// a numerical value with a leading zero is considered a string.
	$keystring = "0" . $key;

	if ($selOpt == $keystring) {

		echo "Match.";

	} else {

		echo "No Match. $selOpt";

	}

} else {


	if ($selOpt == $key) {

		echo "Match.";

	} else {

		echo "No Match. $selOpt";

	}

}


?>

Its a hack, but it works

[tekky]

<?php

$selOpt = "All";
$key = 0;
// a numerical value with a leading zero is considered a string.
if ($selOpt == $key || $selOpt == '0'.$key) {
	echo "Match.";
} else {
	echo "No Match. $selOpt";
}
?>

That should be a bit more efficient 'hack' 😉

[OBCENEIKON]

hmm, its not working....

<?php
    $selOpt = "All";
    $key = 0;
    // a numerical value with a leading zero is considered a string.
    if ($selOpt == $key || $selOpt == '0'.$key) {
        echo "Match. " . $key . " = " . $selOpt;
    } else {
        echo "No Match." . $key . " != " . $selOpt;
    }

?>

prints "Match. 0 = All"

[tekky]

try this... might have had to put the concatenation into ()'s to make it eval right...

<?php

$selOpt = "All";
$key = 0;
// a numerical value with a leading zero is considered a string.
if ($selOpt == $key || $selOpt == ('0'.$key)) {
	echo "Match.";
} else {
	echo "No Match. $selOpt";
}
?>

[OBCENEIKON]

nope, still giving a match...

I never learned the shorthand way of writing statements like that.

[tekky]

looking at your code, your's would give the exact same result....

[OBCENEIKON]

you never tested to see if it was an integer or not

if (gettype($key) == "integer")

[Installer]

How about this:

if ($selOpt == (string) $key) { 
    echo "Match."; 
} else { 
    echo "No Match."; 
}

[tekky]

yes, I did not because the || statement should do the same thing.... testing for something doesnt do anything... notice I still did the '0' . $key in the if check....

[OBCENEIKON]

Originally posted by Installer
How about this:

if ($selOpt == (string) $key) { 
    echo "Match."; 
} else { 
    echo "No Match."; 
}

[/B]

that one worked

[Installer]

I'm waiting for tekky to hit 2000, just so I can say I was there. 🆒

[tekky]

Originally posted by Installer
I'm waiting for tekky to hit 2000, just so I can say I was there. 🆒

😉

[Installer]

I'll treasure that. 🙂 This calls for a Coors.