https://www.php.net/manual/en/language.basic-syntax.phptags.php
Three types of tag are available in php
1.normal tag(<?php ?>)
2.short echo tag(<?= ?>)
3.short tag(<? ?>)
<?= ?>
用于输出，等同于 <?php echo xxx ?>可以直接使用
<?= 'print this string' ?>. 等同于 <?php echo 'print this string' ?>.
标签：short,tags,等同于,代码,tag,php From： https://www.cnblogs.com/cute/p/16945166.html