字符串连接中的PHP错误或我错了吗？ [关闭]

i allways thought, that the Concatenation Dot is to combine multiline-Strings. But today i ran into trouble doing the following:

if (strlen($col->getValue())>$col->getLength())
          $this->errors[]=$name." ist ".
          strlen($col->getValue())-$col->getLength().
          " too much chars!";

i thought this to be one single line after the if-clause, but PHP evaluated line 2 and 3 after the if even when the condition wasn't given here. I needed to do some

if (strlen($col->getValue())>$col->getLength()) {
          $this->errors[]=$name." ist ".
          strlen($col->getValue())-$col->getLength().
          " Zeichen zu lang!";
}

brackets around to get correct result instead of strange Parser errors. Am i understanding the concatenation-Sign usage wrong? I noticed the same when creating multi-line constants in classes ( i.E. prepared SQL Statements).

Does anybody know what i am doing wrong here. Any point i haven't seen?

You need to put parens around this expression:

(strlen($col->getValue())-$col->getLength())

Because you are using the horrible practice of not using braces with your if. Only the first line following the condition is considered part of the condition.