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What is the difference between the PHP open tags “<?=” and “<?php”/“<?”?
Rather than type:
<?php echo $foo; ?>
I have seen it written
<?= $foo; ?>
But I've often wondered what the risk/impracticalities are of doing it? Just curious. Thanks!
分享 If you happen to move the code to an environment where short_open_tag isn't enabled, you'll be exposing a lot of internal variable names (security issue) and have a whole lot of damaged output.
The other downside is that the same setting that allows usage of <?= is the same that lets you open PHP tags with just <?, so having it disabled would not only expose those specific variables you were attempting to display, but also display any PHP code within short tags.
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