This question already has answers here:
<? ?> tags not working in php 5.3.1
(5 answers)
Closed 9 years ago.
Note: I'm using PHP 5.3.3 on a CentOS 6 server.
I'm testing out a new web host and I've discovered that it is simply ignoring the <?= $var ?> blocks of PHP code. For instance, if I have this in a PHP file:
<div id='<?=$page_id?>'>
Then it does not display the value of $page_id, it writes it just as you see there. On the other hand, if I write:
<div id='<?php echo $page_id; ?>'>
Then it displays the variable as it should. On its own, this isn't a big deal. Unfortunately I have a TONNE of inherited code that uses the <?= $var ?> syntax all over the place, so I'd like to avoid having to change it all.
Does anyone know what setting I have to change in order for PHP to recognize this syntax? Our old server was running PHP 5.3.14 and it worked fine.
You need to enable short tags.
Related
This question already has answers here:
<? ?> tags not working in php 5.3.1
(5 answers)
Closed 2 years ago.
I'm trying to install a site locally. Using XAMPP 3.2.3 and php 5.6.
I have an index2.php file which looks like this:
<?
if (2>1)
{
echo 'aa';
}
I open http://localhost/index2.php and see:
1) { echo 'aa'; }
somehow the ">" is interpreted as the end of the php code. How can I make it interpret '>" signs in condition expressions properly? I.e. so the output is
aa
You need to use <?php, not <?, as your script block start.
<? is an XML thing, not a PHP thing.
The <?= syntax is shorthand for <?php echo and is always legal.
But the <? syntax (without the =) is only supported when short_open_tag (in php.ini) is enabled, but this is an obsolete option that is no-longer supported.
This question already has answers here:
How to enable PHP short tags?
(21 answers)
Closed 5 years ago.
im trying to setup my php server to use
<?
echo 'ok';
?>
syntaxis without 'php' inside opening tag. Now my code works like this
<?php
echo 'ok';
?>
How can i achieve this?
I tried to install latest version of php, but it still not working.
ANSWER:
Set short_open_tag=On in your php.ini and restart the server.
CAVEAT:
Short open tags are not used according to PHP coding standard PSR-1 which states:
PHP code MUST use the long <?php ?> tags or the short-echo <?= ?> tags; it MUST NOT use the other tag variations.
The reason for this as mentioned by #Magnus Eriksson is that there may be situations where you do not have access to edit the php.ini and therefore code that uses short tags will be rendered unusable in those environments. Adhere to the standard for maximum portability!
You need to edit your php.ini file and turn short_open_tags on
short_open_tag = On
This question already has answers here:
Are PHP short tags acceptable to use?
(28 answers)
Closed 5 years ago.
After migrate a webpage to a new server (with more updated php-server), I have problems in some pages. These pages uses some different php blocks:
<?
$result = 1;
?>
some html code...
<?php
$result2 = $result;
?>
This works before the migration, but now the $result in the second part is reported as undefined variable in the apache2 error log.
How can I make that variables still are defined in second part?
Make sure to use long tags for php: <? needs to be: <?php
Either that, or enable short_open_tag in php.ini
This question already has answers here:
Difference between <?php and <?
(7 answers)
Closed 6 years ago.
I've got some old legacy code written in PHP 5.3.
All PHP blocks in this code are like
<? some_php_code_here ?>
and my Apache just ignores them, while works good with
<?php some_php_code_here ?>
Why old code contains invalid blocks, and why this old code works good on old server ? It's really hard to google something with so much special symbols, sorry for stupid question
<? is called a php short tag
Here is what the manual has to say about it
PHP also allows for short open tag <? (which is discouraged since it
is only available if enabled using the short_open_tag php.ini
configuration file directive, or if PHP was configured with the
--enable-short-tags option).
You can enable them at runtime with <?php ini_set('short_open_tag',1) ?>
But if you do so you won't be able to use inline xml like so <?xml ?>
and instead you can use
<?php echo '<?xml version="1.0"?>'; ?>
As a side note I do often use:
<?= "Hello world" ?>
<?= 'foo' ?> is equivalent to <?php echo 'foo' ?> and looks much cleaner in template files in my opinion
Since php version 5.4, <?= is no longer tied to short_open_tag but prior to that it was, so care should be taken if you might be running your code on older php versions
This question already has answers here:
Difference between <?php and <?
(7 answers)
Closed 8 years ago.
Sometimes when I use 'php codes' working with <?php and sometimes working with <? as this code
<?php
if(isset($_GET['url']))
{
echo 'There is a url!';
}
?>
Doesn't work to remove php after and use <?, but sometimes working in another projects!
I want to know there are different between <?php and <? ?
They do the same thing. However, you should use <?php unless you're completely sure that you will have full control over the configuration of your server. I say this because short tags (<?) can be disabled on certain hosts and using short tags can make your code less portable.
The first is a safe open and close tag variation, the second is the so called short-open tag. The second one is not always available, use the first option if it's possible. You could check the availability of short open tags in php.ini, at the short_open_tag.