When i write php code with html using php short open tag, it prints 1 every time.
<?= include_once 'includes/footer.php';?>
Why it's happening ?
Because it returns true. You need to use include_once without the short open tag, so like this:
<?php include_once 'includes/footer.php';?>
When you write an open short tag, like this;
<?= include_once 'includes/footer.php';?>
You actually write this:
<?php echo include_once 'includes/footer.php';?>
Which results in "1" on your screen.
Php Short Tag is used to echo the variable not for including the file
<?= ?> (echo short tags)
See this http://php.net/manual/en/language.basic-syntax.phptags.php
Because include_once return TRUE, so if you print it it will display "1"
Just remove the "=" sign and try. In short tags "=" used for echo and since you're including the file without any problem it returns 1 and it will be echoed back.
Happy Coding...!!! :)