[SYMBOL]
[A]
[B]
[C]
[D]
[E]
[F]
[G]
[H]
[I]
[J]
[K]
[L]
[M]
[N]
[O]
[P]
[Q]
[R]
[S]
[T]
[U]
[V]
[W]
[X]
[Z]
<=> (NULL-safe equality comparison operator)
<base> element (HTML)
<pre> tags
\ (backslash)
in regular expressions
{} (braces) (regular expressions)
[] (brackets) client side scripts and
in regular expressions
. (dot operator)
== (double-equal operator)
$ (end anchor) (regular expressions)
=> (equal-to or greater-than operator)
== (equality operator) string comparisons and
/* and */ (multi-line comments)
// (one-line comments)
# (one-line comments)
=== (is-identical operator)
!== (is-not-identical operator))
* (matching operator) (regular expressions)
+ (matching operator) (regular expressions)
? (matching operator) (regular expressions)
% (modulo function)
!= (not equals operator)
^ (not operator) (regular expressions)
<?php and ?> script tags
^ (start anchor) (regular expressions)
4/5 rounding rules
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