multiple If conditions

[MaranV]

Hi, new guy to php here. I`m trying to put 2 if conditions (true) together as you can see below.I checked on various sites and from what I understand /$/b/) - remove the / characters to get the actual code I typed instead of this smirking smiley if (is_numeric ($a & $ ) || ($a == $ should be working but it gives me: Parse error: syntax error, unexpected '||' (T_BOOLEAN_OR) in E:\xamp\xampp\htdocs\PHP\week1opdr4\phpweek1opdr4.php on line 14 I have also tried replacing || by &&,syntax error, unexpected '&&' (T_BOOLEAN_AND) <?php $a = $_POST["Invoerlinks"]; $b = $_POST["Invoerrechts"]; if (isset ($_POST["testplus"])) global $a, $b; if (is_numeric ($a & $ ) || ($a == $ { print "$a is wel gelijk aan $b en zijn beide nummers"; } else { print "$a is NIET gelijk aan $b"; } ?> any help on getting these 2 conditions working to produce an echo/print would be appreciated, ALOT (somehow spending 10 hours on your first home work assignment isn`t that motivating ^^)

Edited September 8, 2012 by MaranV

[roy0702]

You lack 1 closing parenthesis, here try this one...Edit: ok I saw some errors, just try this new one

if ((is_numeric ( $a) && is_numeric($ b )) || ( $a == $ b ))

anyhow, I think the condition is wrong, because the first argument will be ignored if the 2nd is true, and vice versa, maybe you want to change the || condition to && Edited September 8, 2012 by roy0702

[Ingolme]

I believe you actually had one extra parenthesis right after the is_numeric() function

[MaranV]

I believe you actually had one extra parenthesis right after the is_numeric() function

yes thanks Ingolme, it looks a bit odd but this is the only way the function works for me roy, I exchanged the || for && and removed the spaces you left after the $ in the b variables and now it seems to be working like a charm if ((is_numeric ( $a) && is_numeric($b )) && ( $a == $b )) gonna mess around with multiple ifs to get echos for different entries, thanks for the help

[MaranV]

ok I got the numeric checking down, thanks again but now I`m trying to do the same text (letters only) based EDIT: forgot to place ! at both numeric checkers here is the working code elseif ((! is_numeric ( $a) && ! is_numeric($b )) && ( $a == $b )) SOLVED - thanks

Edited September 8, 2012 by MaranV

[MaranV]

just noticed something ((is_numeric ( $a & $b )) && ( $a == $b )) this works aswell (ironicly i was 1 ( away from a working code myself ....) how is this different from ((is_numeric ( $a) && is_numeric($b )) && ( $a == $b )) is the upper code just shorter or are there any advantages/disadvantages between the 2 ?

[birbal]

this

is_numeric ( $a & $b )

and this

  (is_numeric ( $a) && is_numeric($b )

are not same & is bitwise operator && is logical operator in first case bits will be set where both in $a and $b bits are set. and then the evaluated value will be passed in is_numeric() parameter. if $a or/and $b are string operator will work in characters ascii equivalant, in second case it will check if $a is numeric and also $b is numeric if both are evaluates true it returns true. referencehttp://www.php.net/m....comparison.phphttp://www.php.net/m...ors.bitwise.php

Edited September 8, 2012 by birbal

[MaranV]

this

is_numeric ( $a & $b )

and this

  (is_numeric ( $a) && is_numeric($b )

are not same & is bitwise operator && is logical operator in first case bits will be set where both in $a and $b bits are set. and then the evaluated value will be passed in is_numeric() parameter. if $a or/and $b are string operator will work in characters ascii equivalant, in second case it will check if $a is numeric and also $b is numeric if both are evaluates true it returns true. referencehttp://www.php.net/m....comparison.phphttp://www.php.net/m...ors.bitwise.php

thanks for the answer birbal and another question about global scopes this time I used the global code only once in the first if function, yet my functions even work without having the global code in there and on a subsequent note, all the functions function with out how is this possible? w3schools said I need to enter the global code per function <?php $a = $_POST["Invoerlinks"]; $b = $_POST["Invoerrechts"]; if (isset ($_POST["testplus"])) global $a, $b; //(is_numeric ( $a & $b )) && ( $a == $b ))if ((is_numeric ( $a & $b )) && ( $a == $b )) {print "De waarden van $a en $b en zijn gelijk";}elseif ((is_numeric ( $a) && is_numeric($b )) && ( $a !== $b )) {print "De waarden van $a en $b en zijn niet gelijk"; }elseif ((! is_numeric ( $a) && ! is_numeric($b )) && ( $a == $b )) {print "$a is gelijk aan $b";}elseif ((! is_numeric ( $a) && ! is_numeric($b )) && ( $a !== $b )) {print "$a is NIET gelijk aan $b"; } else { print "$a met $b vergelijken is gelijk aan appels met peren vergelijken, het is niet gelijk";}?>

[roy0702]

No, you're not using any funtions in your code, the is_numeric function you use is a php built function, wherein you can use anytime without declaring and you dont need any parameters to use. Here is the function that w3schools is pertaining to: http://www.w3schools...p_functions.aspYou can't use any variables from the outside of your declared function if you dont insert them as a parameter (or parameters if you want many).But you can still use them without inserting, just by declaring it anywhere outside the function as a $global variable. Therefore, your variables up there need not to be declared as globals.

Edited September 8, 2012 by roy0702

[MaranV]

No, you're not using any funtions in your code, the is_numeric function you use is a php built function, wherein you can use anytime without declaring and you dont need any parameters to use. Here is the function that w3schools is pertaining to: http://www.w3schools...p_functions.aspYou can't use any variables from the outside of your declared function if you dont insert them as a parameter (or parameters if you want many).But you can still use them without inserting, just by declaring it anywhere outside the function as a $global variable. Therefore, your variables up there need not to be declared as globals.

he shoots, he scores thanks