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Thanitsak Leuangsupornpong
7,490 PointsI mean we can put more than 3 expression in the loop on not?
Angel Lozano Jimenez
7,255 PointsNo, Thanitsak. It seems like no one really answered your question, but the answer is no. From PHP syntax, to many other languages like C, within a for-loop, you can only have the three expressions within the conditions. Your counter, your comparison and your increment, that is about it.
Thanitsak Leuangsupornpong
7,490 PointsThank you! Angel
4 Answers
Holger Liesegang
50,595 PointsHi Thanitsak Leuangsupornpong !
You might want to have a look at http://php.net/manual/en/control-structures.for.php :
for (expr1; expr2; expr3)
statement
"...Each of the expressions can be empty or contain multiple expressions separated by commas. In expr2, all expressions separated by a comma are evaluated but the result is taken from the last part..."
There are some nice examples illustrating this, too.
Thanitsak Leuangsupornpong
7,490 PointsThanks for answer,and that mean we can put only 3 expression in the loop right?
Thanitsak Leuangsupornpong
7,490 PointsDo you know that why,when I put the <?php?> tag in the workspace or .php file,when I view the code,with the little eye Icon.It can't load the resource error.With all my workspace,I am feel confuse.Any Idea Please?
Ankit Rawat
5,094 PointsIs there a code block that you're trying to execute which requires more than 3 expressions? If yes, please do share it for us to get a better picture of what exactly you're trying to achieve with the loop. Thanks.
Thanitsak Leuangsupornpong
7,490 PointsNow,I have no require for more than 3 expression,but I just want to know,that it can or not.More than 3?Thanks you very much that you want to help.
Ankit Rawat
5,094 PointsI have never seen any for/while/do while loop with more than three expressions. I'm not sure whether you can have more than 3 expressions or not but then again, I've never come across a problem which required more than 3 expressions.
Thanitsak Leuangsupornpong
7,490 PointsThank you very much for your answer!The normal is 3 expression.
Guilherme Oliveira
3,463 PointsMaybe I am a bit late, but I will give it a try.
So, the regular expression on the for loop is - for(expr1; expr2; expr3) - there are just three expressions. Of course you have the option not to use one of them, for(;expr2;expr3) or for(;;expr3) are valid loops (you can play with it), even for(;;;) is a valid loop if you want an infinite loop.
While you can choose not to use all of the expressions, you can't add a fourth expression, but an expression can be composed by many evaluations, for example for($i = 0, $j = 0 ; $i < 10 or $j < 12; $i++, $j++) - try playing with it and echoing $i and $j
Thanitsak Leuangsupornpong
7,490 PointsThank you! Guilherme
geoffrey
28,736 Pointsgeoffrey
28,736 PointsCould you give us more details please ? What do you mean by more than 3 expressions exactly !?