concatinating strings 2

[TheConeHead]

is this valid in php:

$var = "This is ";
$var += "a sentence.";

thus:

$var would be: "This is a sentence.";

if not, what would the alternative be?

 

[sleipnir214]

Nope. "+" and "+=" only have meaning for numbers.

http://us2.php.net/manual/en/language.operators.string.php

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[vbkris]

$var .= "a sentence.";

or

$var = "$var a sentence.";

or

$var = $var. "a sentence.";

Known is handfull, Unknown is worldfull

 

[vbkris]

ah, didnt notice ur reply...

Known is handfull, Unknown is worldfull

 

[Vragabond]

No, it is not. The + is an arithmetic operator used to summing up variables. The concatenating operator in php is dot (.) so correct code would be:

$var  = "This is ";
$var .= "a sentence.";

Find out more about operators here (concatenating is under string operators):

http://at.php.net/manual/en/language.operators.php

 

[Olavxxx]

When I have a variable inside the string, I use brackets like so:

$foo = "foo {$bar}";

Olav Alexander Mjelde

http://www.volvo-power.net

Admin & Webmaster

 

[sleipnir214]

I strongly recommend against that. PHP, even with the brackets, can be picky about associative array references inside quoted strings.

Anyway, except for strings containing escaped characters ("\n", "\t", etc) or SQL queries that use single quotes internally, I recomend using single-quotes around string literals. If you're outputting HTML, it can greatly improve readability to not have to escape all your internal doublequotes.


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[Vragabond]

If you're outputting HTML, it can greatly improve readability to not have to escape all your internal doublequotes.

Albeit one can opt to use single quotes in HTML and double quotes in PHP and avoid escaping that way.

 

[sleipnir214]

True. But most people use double quotes for HTML parameter values.

I've even heard of some interpretations of XHTML that require doublequotes around parameter values.


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