只需要了解用于设置POSTed var [duplicate]的PHP语法

Question

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• What is ?: in PHP 5.3? [duplicate] 3 answers

So I'm using the following php code to set variables that are received from a POST method, but I'm interested in how it works.

$var1 = isset($_REQUEST['var1']) ? $_REQUEST['var1'] : 'default';

I understand what it does, but I don't understand the syntax.

Thanks for the help :)

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Answer 1

This is a short hand IF statement and from that you are assigning a value to $var1

The syntax is :

$var = (CONDITION) ? (VALUE IF TRUE) : (VALUE IF FALSE);