Valid syntax in PHP for different

Question

Is this a valid syntax in php? I want a call to be done if these two conditions are met.

if($valuear[$i] < $rake) and ($winuser != $winar[$i])

Thanks.

I think you are missing the opening and closing bracket for your if statment , else it is okay — Andrew, Nov 12 '15 at 09:24
`and` may not work as you expect it to, it is not the same as `&&` : http://stackoverflow.com/questions/2803321/and-vs-as-operator — CD001, Nov 12 '15 at 09:31

score 1 · Accepted Answer · answered Nov 12 '15 at 09:22

1

No, it isn't

if (($valuear[$i] < $rake) && ($winuser != $winar[$i]) ){}

You must wrap the whole condition in brackets.

This could help you:

and : &&

or : ||

answered Nov 12 '15 at 09:22

Luis González

2

You could also use the words `and` and `or`: http://php.net/manual/en/language.operators.logical.php – tino.codes Nov 12 '15 at 09:24
1

@tino.codes you could but `and` and `or` have lower operator precedence so you may not get what you're expecting : http://stackoverflow.com/questions/2803321/and-vs-as-operator – CD001 Nov 12 '15 at 09:38
1

@CD001 As a programmer you should know the difference between a _comparison operator_ (http://php.net/manual/en/language.operators.comparison.php) an a _logical operator_ (http://php.net/manual/en/language.operators.logical.php). So the operator precedence is absolutly clear (http://php.net/manual/en/language.operators.precedence.php). Simple rule: _Comparison_ before _Logic_ (execpt the `!` ;) ). – tino.codes Nov 12 '15 at 09:51
1

@tino.codes I'm not arguing the point - you're obviously aware of the difference... the same cannot be said of everyone on SO - so I'd tend to err on the side of caution. Yes you can use `and` and `or` **but** you need to know when not to - I've never run into a use case with PHP where `&&` and `||` don't get the desired result. – CD001 Nov 12 '15 at 09:54
2

@CD001 You only get into trouble when you mix it (use `and` and `&&` or `or` and `||`). Than it's hard to understand (for beginners) wich operator has the higher precedence. – tino.codes Nov 12 '15 at 09:59

ThinkTank · Answer 2 · 2015-11-12T10:20:17.427

0

This is the valid way :

if($valuear[$i] < $rake && $winuser != $winar[$i])

edited Nov 12 '15 at 10:20

answered Nov 12 '15 at 09:20

ThinkTank

Could you rephrase your answer to make yourself clear ? Written this way, one can think that the code you provide is not valid. – xlecoustillier Nov 12 '15 at 09:22

score 0 · Answer 3 · answered Nov 12 '15 at 09:23

0

Set the brackets in this way:

if($valuear[$i] < $rake and $winuser != $winar[$i])

The basic syntax is:

if (expr)
  statement

answered Nov 12 '15 at 09:23

tino.codes

score 0 · Answer 4 · answered Nov 12 '15 at 09:25

0

you will get syntax error for what you have done

if($valuear[$i] < $rake) and ($winuser != $winar[$i])

It should be

if(($valuear[$i] < $rake) and ($winuser != $winar[$i]))
  ^                                                   ^

answered Nov 12 '15 at 09:25

Niranjan N Raju

4 Answers4