Re: [PHP] Boolean type forced on string assignment inside if statement
On 01/02/2013 10:21 AM, Marc Guay wrote:
Won't this type of condition/test always return true?
I simplified the example. In my real life case the "foo" and "bar"
are variables which can be empty strings, and if they both are not, I
would like to display them.
Marc
Then why not use empty()?
$a = "foo";
$b = "bar";
if ( !empty($a) && !empty($b) ){
echo $a."".$b;
}
The reason I ask is that what if one of your strings was a "0" (zero) I
would expect your code would not work as you had intended.
php -r 'if ( $a="foo" && $b="0" ) { echo "\n\n{$a}\n{$b}\n\n"; }'
In my testing, it does not. I would then have to ask, how often do you
think a string will be "0"?
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Re: [PHP] Boolean type forced on string assignment inside if statement
On 01/02/2013 07:53 AM, Marc Guay wrote:
Hi folks,
if ($a = "foo"&& $b = "bar"){
echo $a."".$b;
}
Returns:
1
bar
I expect:
foo
bar
Is this documented?
Marc
Why would you do this.
I cannot envision a time or condition that would require such a "test".
Can you please explain why you would want to do this?
Won't this type of condition/test always return true?
--
Jim Lucas
http://www.cmsws.com/
http://www.cmsws.com/examples/
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[PHP] Re: Boolean type forced on string assignment inside if statement
On 02 Jan 2013 at 16:05, Stephen wrote:
> On 13-01-02 10:53 AM, Marc Guay wrote:
>> Hi folks,
>>
>> if ($a = "foo" && $b = "bar"){
>> echo $a."".$b;
>> }
>>
>> Returns:
>> 1
>> bar
>>
>> I expect:
>> foo
>> bar
>>
>> Is this documented?
>>
>
> && takes precedence over =
>
> http://php.net/manual/en/language.operators.precedence.php
>
> You may want to use brackets
OP may want to avoid doing something unusual which may confuse a casual reader.
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Re: [PHP] Boolean type forced on string assignment inside if statement
On 13-01-02 10:53 AM, Marc Guay wrote:
Hi folks,
if ($a = "foo" && $b = "bar"){
echo $a."".$b;
}
Returns:
1
bar
I expect:
foo
bar
Is this documented?
&& takes precedence over =
http://php.net/manual/en/language.operators.precedence.php
You may want to use brackets
--
Stephen
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