What does $$ in php mean?
4615
What does $$ (dollar dollar or double dollar) mean in PHP?
15994
Reference — What does this symbol mean in PHP?
34625
What is the difference between $* and $@?
108661
In php, is 0 treated as empty?
139020
explain php output
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What does a leading zero do for a php int?
101854
What is the difference between $@ and $* in shell scripts?
27328
What are \r and \n meaning in PHP?
36359
What does $# mean in shell?
59642
Strange echo, print behaviour in PHP?
111655
What is the difference between single-quoted and double-quoted strings in PHP?
138524
$* in bash scripting
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Javascript string replace weirdness -- $$$$ gets collapsed to $$ -- what's the reason behind this result?
93920
What does @ mean in PHP?
65571
How to print "$" in here-document
75605
What does ~$ stand for?
112888
What does $#array mean in Perl?