What is the difference between <? and <?php
1067
Are PHP short tags acceptable to use?
32886
What is the difference between != and =! in Java?
19555
Difference between >>> and >>
37909
Understanding nested PHP ternary operator
70947
DEFINE vs Variable in PHP
47400
How are echo and print different in PHP?
43522
What is the "?" symbol in URL used for in php?
84584
Difference between | and || or & and && for comparison
84802
What is the difference between <%: and <%= in ASP.NET MVC?
89873
PHP: a short cut for isset and !empty?
15994
Reference — What does this symbol mean in PHP?
26804
What is the difference between HTML tags  and ?
2182
vs. . Which to use?
56824
What is the difference between <%# and <%= in ASP.NET MVC?
21907
Why is "\?" an escape sequence in C/C++?
34625
What is the difference between $* and $@?
59666
what is "?" in ruby