Concatenating ECHO syntax in PHP

Question

I have made a small function (WordPress), using echo .

/* .. Some code */
switch ($linktype) {
    case \"next\":
        echo \'


        

Answer 1

everything that needs to be EVALUATED in some way (expression, function) will be inevitably "pushed" to the end when using dots?

I can't reproduce this behavior. And, according to my knowledge, it should be contrary: echoed (not evaluated) values goes first, and then goes the result of the echo.

it seems you are mixing 2 matters - evaluation and echoing.
when concatenated, all expressions gets evaluated in turn:

function aplus($b){
  global $a;
  $a += $b;
}

$a=1;

echo $a."|".aplus(1).$a."||".aplus(1).$a;

while if you are of bad practice of mixing echo with statements having output of their own, this separate echo goes first:

function e($s){
  echo $s;
}

$a=1;

echo $a."|".e($a +1)."||".e($a+2);