Introduction to PHP Tutorial:? (question mark) and: (colon)

For example:

1	$shenhe = $val [' Available ']? Audited ": Not audited"

Often have just contacted a friend of Php asked me, PHP often see such as the code on the statement, question mark and colon what meaning, this statement is what meaning?

In fact, this is the abbreviation of an if statement, syntax in C language, conditional expression E1?e2:e3, if E1 is true (not 0), then the value of this expression is e2 value; If False, the value of the expression is E3. Equal to

1 2 3 4 5 6

$e = "" 02.if (E1) { $e =e2; } else{ $e =e3; }

Where E1, E2, E3 are expressions.