PHP-output in PHP bewerken

<?php
if (...) {
  echo ("iets 1");
} else {
  echo ("iets anders");
}

<?php
if (...) {
  echo ("iets 1");
} else {
  echo ("iets anders");
}

$ietsofietsanders = include(pag1.php); //nee, dit werkt dus niet...

$ietsofietsanders = include(pag1.php); //nee, dit werkt dus niet...

include(pag1.php);

include(pag1.php);

<?php
#pag1.php

function echoPage (){
if (...) {
  $echo ("iets 1");
} else {
  $echo ("iets anders");
echo $echo
return $echo;
}
}?>

<?php
#pag2.php
include ('pag1.php');
$pag1 = echoPage();
?>

<?php
#pag1.php
 
function echoPage (){
if (...) {
  $echo ("iets 1");
} else {
  $echo ("iets anders");
echo $echo
return $echo;
}
}?>
 
<?php
#pag2.php
include ('pag1.php');
$pag1 = echoPage();
?>

<?php
ob_start();
include ('pag1.php');
$pag1 = ob_get_contents();
ob_end_clean();
?>

<?php
ob_start();
include ('pag1.php');
$pag1 = ob_get_contents();
ob_end_clean();
?>

<?php
$pag1= file_get_contents("pag1.php");
?>

<?php
$pag1= file_get_contents("pag1.php");
?>