new template in wordpress is not displayed under page attributes -> template

Question

i want to integrate several layouts into my theme. so far I have solved it via page.php and page-blue.php because I saw it that way in tutorials. unfortunately the other template is not displayed under the page attributes. i don't see the error. even if i choose a different theme the attributes do not appear. what am I doing wrong?

it should look like this

this is how it looks

this is the page.php

this is the page-blue.php

Answer 1

pls Use This code

<?php
/*
* Template Name: page-blue
* Template Post Type: post
*/
get_header();
?>

instead of this

<?php
/*
* Template Name: page-blue
*/
get_header();
?>

Answer 2

Change the name of the template, page is reserved word, also create brand-new file with file name other than page.php, which is also reserved file name. And, for god's sake, name your template files in a way they mean something, self-explanatory.

Example for dummies:

<?php
/*
* Template Name: Some Template
*/

And the file name of the template should be some-template.php inside your theme's folder!

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