Php ternary computation

$ A = 2; $ a = 1? $ Test = & quot; Enterprise & quot; :( $ a = 2? $ Test = & quot; Region & quot;: $ test = & quot; other places & quot;); echo $ test; first, judge whether $ a is 1. if it is a direct output enterprise. if it is not, then determine whether $ a is equivalent to another nested if in else. if it is equal to $ a = 2; $ a = 1? $ Test = "enterprise": ($ a = 2? $ Test = "region": $ test = "other places"); echo $ test; first, judge whether $ a is 1. if it is a direct output enterprise, if it is not to continue to judge, it is equivalent to embedding another if in else. if it is equal to 2, the output area is equivalent to $ a = 2 if it is not the output area. if ($ a = 1) {echo $ test = "enterprise";} else {if ($ a = 2) {$ test = "region ";} else {$ test = "other places" ;}} echo $ test; or if ($ a = 1) {echo $ test = "enterprise ";} else {$ a = 2? $ Test = "region": $ test = "other places ";}